Tender For manufacturing and supply of single piece spring inserted reusable seize nut for size m-25 lock nut m 025. specifications of saper lock nut model no sp25 pitch: 3, hn: 22, bn:38.0, cn: 43.5, ln 37 sn: 38 materials sts, s45c, scm, plating electro zinc plating, melted zinc, nickel, chrome, zinc powder plating. make: saper lock or similar [ warranty period: 30 months after the date of delivery ]