25 x 190 Socket Cap Screw 12

5/16-18 x 3 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (450)

5/8-11 x 7 1/2 Hex Cap Screw SS 316 (A4)

The interlock between the tabs of the take-up washer and the threads under the head of the SDWF prevent the screw from sliding back under load

9/16-18 Nylon Insert Locknut 316 Stainless Steel Drop-In Anchors Zinc Plated 25 x 190 Socket Cap9 16 18 Nylon Insert Locknut 316 Stainless Steel . 316 stainless steel hex nut with a nylon filled collar at its back end. When a screw reaches the collar, the threads and nylon form a tight, frictional fit, restricting movement of the screw when it is subjected to vibration. Designed to be used with like material machine screws and bolts. It is able to be reused more times than a two way reversible nut, however, nylon will begin to deteriorate at