Latest machine shaft Tenders | Government machine shaft Tenders

corporations/Associations/Others

CTN :41275545

30 Aug, 2025 NA

Cuddalore - Tamil Nadu

Tender For supply of item no. 1: cs010040068: forged, normalized and fully machined shaft for stage-1 2000mm conveyor prim , item no. 2: cs010040066: forged, normalised and fully machined shaft for stage-i 2000mm conveyor seco , item no. 3: cs010040067: forged, normalized, quenched & tempered and fully machined shaft for mine-ii , item no. 4: cs010040065: forged, normalised and fully machined shaft for stage-ii 2000mm conveyor dri

CTN :41275325

11 Aug, 2025 NA

Krishna - Andhra Pradesh

Tender For supply of s and i of conveyor section e e - design and sply of conveyor chain , design and sply of conveyor bend , chain conveyor sys 5hp drive unit 18to20 , erec of chain conveyor system test and commn , design and sply of conveyor tail end , erection and commng of conveyor tail end , basic engg design eqpts consultancy , design and sply of conveyor overhead , lock pin,chain conveyor , sprocket teeth 14,cs,bore dia 60mm , sprocket teeth 14,cs,bore diameter 65mm , 8 teeth sprocket , brg unit,plummer block,ntn 212 , brg unit,plummer block,ucp 213 , tail end shaft en8,dia 40xlg 380mm , 5by2 valve, double external pilot, port s , antenna valve swivel lever with antenn , hand lever valve, config 5by2, port size , uhmwpe wear strip 2500x40x10 , corner teflon for c bend , conveyor side railing teflon 6x50 mm , housing 212 skf bearing , housing 213 skf bearing , double stopper with cyl , z arm double stopper with cyl

CTN :40842255

01 Aug, 2025 NA

Chandigarh - Chandigarh

Tender For bid to ras bid to ras corrigendum : supply of force traveller vehicle spare parts - acc cable , air filter element , bearing crank shaft , big end bearing std bm euro ii , bonnet catcher cable , bonnet catcher lock , copper brush 12v , centre bearing with rubber , chain tensioner oil pump chain , chain tensioner timing chain , clutch plate , clutch release bearing , connector oil pump pump to engine gallery , copper bush self , cr bush semi std , crank shaft gear c0tter , cut out alternator , cylinder linner std , door trim pad , drag link end , engine mounting , eng oh gaskit comp w o ring valve in and exh seal ckt shaft oil seal , engine timing chain , fan belt ac , fan belt alternator , fiber washer armature , fip assy , front brake disc pad both side , fuel filter set , fuel injector , gear linkages kit , gear ring fly wheel , gun metal bush fuel pressure pump shaft , hand brake cable , main bearing std bm , oil filter , oil jet banjo bolt , oil pipe turbo , oil pressure switch , oil pump assy , oil pump drive chain , oil retainer drain pipe breather , oil rubber hose , paint white 2k , piston ring std , piston set pin and lock set std , pressure plate assy , propeller shaft slip joint , radiator assy , rear brake shoe adjust kit , rear brake shoe both side , rear brake shoe lock , rear wheel bearing inner , rear wheel bearing outer , rear wheel brake cylinder , rear wheel oil seal , regulator handle , bar bacon light , self armature , shock absorber front , shock absorber rear , side indicator assy small , silencer mounting rubber , solenoid switch self 12 volt , speedometer assy , speedometer cable , suspenssion bush kit , tail light assy , temp switch , thermostate valve assy with body , thrust washer std , timing chain guide set with guide pin , turbocharger assy , valve guide inlet and exhaust std , valve inlet and exhaust std , valve seat inlet and exhasut , water hose set , water pump assy , wipper blade , brake shoe rear with rivits , center bearing with rubber , door regulator handle , front brake disc pad , front wheel bearing big , front wheel bearing small , front wheel oil seal outer and inner , pressure plate , rear wheel oil seal inner , rear wheel oil seal outer , solenoid switch self , tail light assy lhs and rhs , brake caliper assy front rh , brake caliper assy front lh

CTN :41220007

11 Aug, 2025 NA

Ghaziabad - Uttar Pradesh

Tender For supply of mechanical spares at loni lpg top d d - brgballradial2122z , housingp212 , brg unitplummer blockucp212 , brgballradial213 2z , brg unitplummer blockucp213 , duplex chainconveyor , lock pinchain conveyor duplex chain , lock pinchain conveyor , conveyor chain rivetted , conveyor chain detachable , conveyor chain pin , counter weightchain conveyor , standard ms couplingshaft , tyre couplingpump , tyrecoupling , spidercoupling l110 , spidercoupling l100 , spidercoupling l150 , sply of swivel double stopper , double stopper setstraight , arm for swivel double stopper , oil sealgear box , tail end shaft 40x380 , chain conveyor shaft 40x350 , conveyor shaft 60x850 , conveyor shaft 60x650 , shaftchain conveyor 60x750 , shaftconveyor 65x850 , sprocketduplex gear teeth 22 51 bore , sprocketduplex teeth 24 51bore , sprocketduplex gear teeth 28 60bore , sprocketduplex gear teeth 32 60 bore , sprocketduplex gear teeth 34 60 bore , sprocketduplex gear teeth 38 60 bore , 8 teeth sprocketdrive unit , sprocket 14 teeth 60 bore , e platechain conveyor , flat e plateconveyor , uhmwpe wear strip 2500x40x10 , wear stripchain conveyor , half leg railing supportconve , leg supportconveyor , taper stripconveyor bend 4pc , bolthex hdcsm10x30 mm , allen cs bolt m8x25 with nylon lock nut , hex cs bolt m8x50 with nut , bolthex hdcsm8x100 mm , bolthex hdcsm10x50 mm , bolthex hdcsm10x100 mm half thread , bolthex hdcsm12x30 mm , bolthex hdcsm12x 50 mm , bolthex hdcsm16x50 mm , bolthex hdcsm18x50 mm , bolthex hdcsm4x25 mm , bolthex hdcsm4x50 mm , bolthex hdcsm6x25 mm , bolthex hdcsm6x50 mm , boltallen headasm8x25mm , screwallen headasm2x5mm , boltallen headasm6x50mm , boltallen headasm5x50mm , bolthex hdcsm4x20mm , boltallen headssm6x20mm , boltallen headssm6x25mm , bolthex hdssm8x20mm , bolthex hdcsm10x25mm , boltallen headssm4x10mm , fastner 12x150 , fastner 16x150 , conveyor drive section , conveyor section straight cha , conveyortail end section , conveyorbend wo chain , fabrication of soap tray , c channelconveyor , gi tray350x40x2mm , shaft helical drive 60x780x230x50 , shaft helical drive 65x780x230x60 , sprocketduplex gear teeth 18 45 bore , sprocketduplex gear teeth 18 65 bore , sprocket 14 teeth 65 bore , sprocketduplex gear teeth 22 50 bore , diverter , sprocket 12 teeth 65 bore //bid details 2 / 63

CTN :41030874

16 Aug, 2025 5.79 Crore

Karwar - Karnataka

Tender For corrigendum : procurement of fcbt and td auxiliary spares - bushing, countersunk screw m-8, rear thrust pad, gasket paronite (p)oh-(b)t s 1.0 gost 481-80, insert, shaft, impeller, ring, coupling, condensate pump, lock washer, oil retaining ring, turbine rotor assembly, two-half ring, gear shaft, flange, oil retaining ring, coupling, feed pump, jacket, nut, lock washer, intermediate bushing, spinner, nut m64 x 3, jacket, throttle valve, ring, ring, insert, reduction gear case, bolt - m10- 6g x 50, bolt - m10- 6g x 50, bolt - ml2-6g x 30, bolt - ml2-6g x 45, guide blade assembly, hex head nut m-12-6h, hex head nut m-14-6h, hex head nut m-16-6h, nozzle, plug, pocket, semi ring, screw, stud ml2- 6g x 25, stud m12- 6g x 30, stud m14 -6g x 30, stud m16-6g x 40, stud m12- 6g, nut, ring, rod, rod, safety valve, hand oil pump, male threaded-end straightway, bronze threaded-end angle stop valve, hand pump filter, oil indicator, rotor assembly, thrust disk, gland case in two halves, four segment sealing ring, reduction gear rotor assembly, reduction gear rotor, gear, roller, coupling, lock ring, coupling roller, nut m24x1.5-6h 05 06, gear wheel, key, setting ring, ring of two half, spherical washer, cover, gasket, slide valve, special nut, axle box, stud ?8-6g?22 56 029, ring 8?12, cap, gasket, flange, bushing, drive gear, bushing, bushing, bushing, bushing, spring coupling, pin 4?15, bracket, through woven stuffing, key 5?5?30, drive gear, bushing, pin 2?14, gasket, gasket, screw-in union, pin, plug, screw ?6-6g?10 14? 029, lever, jacket, slide valve, bellows, piston, spring, slide valve, speed regulator spring, tension screw, bushing, yoke, ring 2-43.8-4.1, spring, lower bushing of driven screw, lower bushing of driving screw, thrust plate (end thrust bearing), pump half-coupling, flat spring, gasket sail cloth no.1(p)b code no.11102 grade 1,100 cm wid, gasket rubber (i)p(p)-2025 s 2.0, sheild in two half, support pad, guide blades & steam shield, bushing, floating ring of two halves, support pad, sheild, support plate, support plate, thrust pad, valve seat, ball d84, lock washer a.6.08?18?10?, lock washer a.8.08?18?10?, ball link, spherical end thrust bearing in two half, spring, spring, bellow, magnet ball bearing 6010, gasket cardboard ? s 0.3 gost 9347-74, gasket polytetrafluoroethyl ene plate, grade 1 s 2.0, lock washer 10.08?18?10?, lock washer 16.08?18?10?, bolt m10, axle, ball link, end-thrust bearing, bushing, axle, bushing 12x10, shackle, bushing 10x10, cap nut, cross-piece, valve, gasket paronite (p)oh-(b)t s 1.0 gost 481-80, gasket paronite (p)oh-(b)t s 1.0 gost 481-80, lock washer 16.08x18x10t, stud m24, stop valve assembly, stem, valve seat, valve, bellows as an assembly, tail piece, coupling of 2 halves, spring, gasket d 189?153?4, key, key, gasket cardboard ? s 0.3 gost 9347-74, gasket cardboard ? s 0.3 gost 9346-74, gasket paronite a-1 s 1.0 gost 481-80, gasket paronite b-1 s 1.0 gost 481-80, gasket paronite c-1 s 1.0 gost 481-80, lock washer 12. 08?18?10?, lock washer 20. 8?18?10?, lock washer 8. 08?18?10?, spring washer 5 65? 029, spring washer 6 65? 029, stop angle valve dn10 pn 6.4 mpa, lock nut, bolt m12, bolt m10, stud m16, stud m16, stud m20, serrated metal washer, nut m12, nut m10, nut m16, nut m20, special nut, nozzle segment, seal ring - assembl, seal ring - assembl, rear bearing insert, front bearing insert, gland steam regulator assembly, flat spring, membrane assembly, cup, driving half-coupli, ring, driven gear, electric pump shaft, bearing(626)

CTN :40800559

29 Jul, 2025 NA

Pune - Maharashtra

Tender For bid to ras bid to ras supply of 000296 chain assy single leg 50 11 12 mk ii , 10318970 lv7 itr beml 4720 000414 hose assy rubber 600 long lot 2 to 4 , 10319114 lv7 itr beml 5306 005207 bolt square head for thrust pad m14x110 , 10321496 lv7 itr beml 3110 003549 coller brg od 105 id 66 x thk 8 , 10321632 lv7 itr beml 3110 003551 coller bearing od 146 x id 198 x thk 18 , 10322542 lv7 itr beml 5315 008518 steering lock pin , 10322770 lv7 itr beml 5315 003174 pin straight headed long 30 mm dia 31 mm , 10323074 lv7 itr beml 50 66 51 pin lot 1 2 , 10325974 lv7 itr beml 2540 000628 wheel chock block , 10345483 lv7 itr beml 2510 000655 cover assy , 10311177 lv7 itr beml 50 223 24 hand lamp assy lot 2 to 4 , 10311297 lv7 itr beml 5310 004995 nut plain hex black steel m 3 , 10311368 lv7 itr beml 5365 181246 spacer ring , 10312051 lv7 itr beml 50 319 113 slotted chesses hd screw am 6 x 10 , 10312254 lv7 itr beml 50 193 dust cover lot 2 , 10317676 lv7 itr beml 50 1 77 removeable walk way plate lot 1 2 , 10318212 lv7 itr beml 50 476 guide roller bracket assy , 10318382 lv7 itr beml 50 367 11 pin dia 32 x 110 lot 3 4 , 10318977 lv7 itr beml 5306 005217 bolt machine 50 182 mk ii only , 10322512 lv7 itr beml 50 55 2 15 0 30b 6 core pvc cable 8 m long , 10326038 lv7 itr beml 2530 004623 50 82 dust shield lot 1 , 10311335 lv7 itr beml 3120 000671 bushing sleeve ms od 125 x id 83 x thk , 10311363 lv7 itr beml 6220 000161 tail light stop light lh sb 122 bn , 10311473 lv7 itr beml 4730 000929 adopter straight hose to suit 8 mm hose , 10311532 lv7 itr beml 4730 000927 nut union pipe 3 8 m 911030 , 10312061 lv7 itr beml 50 319 111 pipe l 2100 x 5 8 od x16g seamless , 10312822 lv7 itr beml 4730 077835 bush lot 2 , 10316536 lv7 itr beml 5120 007050 solid box spr with handle se 36 , 10318436 lv7 itr beml 50 359 8 fork rh 50 x 45 x 140 long lot 3 4 , 10320896 lv7 itr beml 50 416 spacer lot 3 4 , 10321251 lv7 itr beml 50 296 8 spacer od 102 x id 58 3 x thk 8 , 10321744 lv7 itr beml 5310 006451 nut slotted hex thin black steel m 56 , 10322502 lv7 itr beml 50 8 7 centre pivot bottom plate mk i , 10323067 lv7 itr beml 50 264 3 cable l4 25 mtrs lot 3 4 , 10323079 lv7 itr beml 50 66 75 d shackle lot 2 , 10326457 lv7 itr beml 50 64 18 spring washer m14 b lot 1 , 10326898 lv7 itr beml 2530 002547 chamber air pressure brk type 36 , 10372711 w17 mh 39200048 converter pump supremo , 10369852 w17 mh 39550164 hose daul filter to injection pump , 10373399 w17 iws vs 7852135 00 lub oil filter , 10351184 w17 mh 59176938 brake shoe , 10350299 w17 mh 02367750 hose , 10351236 w17 mh 02556055 fan belt s4 , 10351183 w17 mh 59076399 cable engine stop , 10351241 w17 mh 37110001 kit master cyl major , 10350496 w17 mh 02050550 shoe and lining assy , 10369850 w17 mh 39550621 hose sump to pump , 10558622 w17 2023466 dummy shaft , 10371990 w17 mh 02354659 filter return , 10351119 w17 iws gbm 59076399 exhaust pipe engine end , 10558684 w17 iws ace coq03210200w wheel cylinder kit , 10351232 w17 mh 39550630 hose tee piston rod to lh rh tilt cyl , 10369847 w17 mh 39550629 hose lift rod end to lh rh tilt cyl , 10350558 w17 mh 02012102 trans oil filter , 10369848 w17 mh 39550625 hose steering unit to cyl , 10351107 w17 iws gbm 39400087 seal kit lift cyl repairs dantal , 10350554 w17 mh 02006899 //bid details 3 / 150 moulded hose radiator top , 10371411 w17 iws vs 785775304 battery cable ve , 10341435 lv7 t 815 5365 183269 rubber bushing , 10340139 lv7 t 815 5310 240614 sealing ring 12x16 is 3175 74 cu , 10318014 lv7 t 815 107 901 324 000 sealing ring 22x27 , 10311989 lv7 t 815 4x4 130 010 420 154 suspension eye , 10319247 lv7 t 815 4x4 131 400 172 000 cable clamp 430x8 8 tsl 430 hd 8320 261 , 10319264 lv7 t 815 4x4 131 400 168 000 cable clip 140x3 6 , 10519303 lv7 t 815 hmv 324 937 032 168 insert fvh 103 15 , 10532167 lv7 t 815 hmv 442 051 361 294 plug , 10531998 lv7 t 815 hmv 442 076 827 844 line , 10518755 lv7 t 815 hmv 130 075 030 594 pedal bearing , 10530973 lv7 t 815 hmv 442 052 780

Central Government/Public Sector

CTN :40937110

07 Aug, 2025 NA

Mandal - Gujarat

Tender For corrigendum : supply of h.b.f spares> - wear belt (56850 x 50 x 6mm thk), scrapper blades 4.2mtrs hbf, curb of 125mm height (each meter), 4 numbers of end slides, buta seal (1mm thk x 29000mm), teflon strips (4200mm lg) (uhmwpe), spray nozzles (each), belt guide rollers, cloth trackig air bellows (1 set = 2 nos), plummer blocks for 110 sq.mm "uhmwpe"-1210ek with out bearing, plummer blocks "uhmwpe"-1209ek with out bearing, vacuum box lifting cylinder assembly, 4 nos ss304 clamps, air duct sleeve, 400 nb belt return rollers "msrl", feed dam roller msrl, 100 nb cloth return rollers, 150 nb cloth return rollers, cloth tension assembly, pneumatic panel, filtration hose along with 100mm x 2900mm length with 4nos ss304 clamps, filtration hose along with 100mm x 3000mm length with 4nos ss304 clamps, one set of seal strips s for 110 m2 hbf (one set consists of 18 pieces for the vaccum box, 1 piece at head end, 1 piece tai end, 4 pieces half moon at ends), slurry feeder hose for nuetral hbf flexible hose -274m id x 1850mm long with hose clamps to suite 250b pipe., slurry feeder hose for nuetral hbf flexible hose -169m id x 1800mm long with hose clamps to suite 150b pipe., bowed roller for horizontal belt filter of diameter 150mm (moc of shaft : ss316), axle diameter : 75mm.roller face : 4450mm, height of bow : 74mm, wear belt(56850 x 50 x9 mm thk), vacuum box (moc :ss304), vacuum box lifting leaver assembly(moc :ss304), spares of 5 m2 horizontal vaccum belt filter (model: 12b/02-30v product filter), cloth tensioner assembly, belt return rollers 250 nb, feed dam rollers 285 nb, cloth roller 75 dia, cloth tension roller 75 dia, cloth tracking roller 75 dia, belt guide roller m.k a ss304/hdpe, belt guide roller m.k b ss304/hdpe, belt guide roller m.k c ss304/hdpe, seal water assy-ss304, spray pipe assembly, spray sheet pvc, cloth tracking unit-ss304/nr bellows, pneumatic pannel/cloth sensor assy, spray pipe manifold, slurry feeder assy, curb 75mtrs ht (each meter), wear belts endless (6thk x 35 width, 12875 length), plummer blocks "uhmwpe"-1207ek with out bearing, cloth scrapper, plummer blocks 30 dia for scrapper "uhmwpe" with out bearing, feed dam roller bearing blocks with out bearing, filtrate hoses along with hose id 75 x 1750mm long with 4 nos of ss316 clamps, seal strip sets consistes of 4 nos of seal strip, 1 no. head end pad, 1 no. tail end pad, and 4 nos of end slides

CTN :41185563

13 Aug, 2025 NA

Patiala - Punjab

Tender For supply of spare parts tyre batteries tarpaulin hood - oil filter tata 1613 bus , combination switch 24 volt tata 1613 truck , fuel filter water sep tata 1512 bus , oil filter tata 1212 truck , front brake shoe tata 1512 1212 tc , rear brake shoe tata 1512 1212 tc , center bearing tata 1512 bus , clutch plate with pressure plate release bearing 352 dia , pilot bearing tata 1212 1512 1613 tc , clutch master cylinder tata 1613 truck , clutch slave cylinder tata 1613 truck , dd unit major kit tata 1212 truck , u j cross assy tata 1212 truck , air filter hose tata 1212 truck , door glass machine rh tata 1212 1613 truck , door glass machine lh tata 1212 1613 truck , door glass regulator tata 1212 1613 truck , stg universal joint tata 1212 1613 truck , front fender rh lh tata 1212 1613 truck , tie rod end set tata 1212 1613 truck , king pin bush 4x4 tata 1212 truck , king pin bearing lower tata 1212 truck , king pin bearing upper tata 1212 truck , speedo sensor 24 volt tata 1512 1212 tc , propeller shaft dust boot tata 1212 1613 tc , gear lever boot tata 1212 1613 truck , radiator reservoir tank tata 1512 bus , hand brake switch 24 volt tata 1212 tc , water body tata 1613 truck , water pump assy tata 1212 tc , rear brake booster assy tata 1212 tc , front brake chamber tata 1212 tc , tail light assy lh rh tata 1212 tc , oil filter tata 712 , air filter tata 712 , oil filter tata 407 , front brake shoe set tata 709 712 , rear brake shoe set tata 709 712 , clutch cover assy tata 709 , clutch plate assy tata 709 , clutch booster assy tata 709 , clutch release bearing tata 709 , clutch slave cylinder tata 407 , clutch master cylinder tata 407 , main oil filter sml bs iv , by pass filter sml bs iv , air filter assy sml truck bs iv , uj cross assy tata 407 , wheel cylinder assy tata 407 bs iv , wheel brake adjuster tata 407 , head light assy sml truck bs iv , front indicator set sml truck bs iv , pressure plate 280 dia tata 410 , clutch release bearing tata 410 , oil filter tata sumo , oil filter maruti gypsy , air filter maruti gypsy , disc pad assy tata sumo , brake shoe rear tata sumo , tyre size 7 50 x 16 rib tube and flap , tyre size 235 65 r17 tubeless , tyre size 215 75 r15 , battery 12 volt 80 ah buy back offer tata 407 , battery 12 volt 100 ah buy back offer tata 709 , battery 12 volt 70 ah ey 700 buy back offer scorpio s 11 , battery 12 volt 70 ah ey 700 buy back offer scorpio s 10 , tarpaulin hood std cabin tata 1212 1613 truck , tarpaulin hood sml truck , tarpaulin hood tata 407 , tarpaulin hood tata 709 truck , tarpaulin hood rope 14 15 mm

CTN :41163099

02 Aug, 2025 NA

Gorakhpur - Uttar Pradesh

Tender For supply of conveyor chain , 8 teeth sprocket , tail end shaft , 14 teeth sprocket , shaft 60 mm od x 850 mm length

CTN :41075880

04 Aug, 2025 5.00 Lacs

Khorda - Odisha

Tender For supply of piston with pin std , piston ring set std , big end bearing connecting rod , main bearing connecting rod , valve inlet , valve exhaust , valve guide inlet , valve guide exhaust , valve seal inlet , valve seal exhaust , crank shaft oil seal front rear , cylinder linner complete set , cam shaft oil seal , oil pump assy , oil filter , fuel filter , water pump assy , disk clutch with cover assy , accelerator cable , cylinder head gasket , fly wheel pilot bearing , element air filter , dhoti , engine overhaling gasket complete set , shock absorber front , shock absorber rear , brake master cylinder , crank shaft thrust washer , cam shaft bush , thermostate valve , oil sending unit , temprature sending unit , benjo washer all type , anabond tube , brake pad , rear brake shoe , uj cross , wiper blade , side rear view mirror lh , side rear view mirror rh , head light assy , tail light assy , clutch release bearing , chain tensioner assembly , gasket for chain tensioner , shoe for chain tensioner chain shoe , side rail upper chain lower , side rail for chain upper side rail , bushing oil pump drive , gasket exhaust manifold , side rail assembly with bush , assembly bearing pin sliding rail , radiator cap , cylinder kit , came chain kit , kit disc clutch friction , clutch pressure plate kit , clutch hub , clutch housing , center complete clutch , gaskit kit , valve kit with oil seal , o ring kit , chain sprocket set , shoe complete brake set front , shoe complete brake set rear , horn12v , connecting rod with bearing , spark plug , speedometer cable , brake cable front , clutch cable , winker assy with bulb front rear left right , roller assy cam chain tensioner , tensioner assy cam chain , guide cam chain , brake cable front clutch cable , lifter assy tensioner , tata oil filter bs vi , tata fuel filter bs vi , tata wiper blade bs vi , sml oil filter bs vi , sml fuel filter , sml clutch plate , sml pressure plate , sml release bearing , sml combination switch bs vi , sml clutch cylinder upper , sml sleeve cylinder lower , sml wiper blade , tail light assy led left right tata sumo , wiper blade tata sumo , side mirror left right tata sumo , wiper blade mm scorpio , head light relay 6 pin , anabond 100gm , tie rod end complete set tata sumo , dash board flag stand , door guard , seat beat , back seat organiser bag , door glass film roller

Machine Shaft Tenders

By Cities

By States

By Agencies

By Ownerships

By Sectors

corporations/Associations/Others

Central Government/Public Sector