H & S Locking Nuts Product Page

Hex Jam Nut
Description	A six-sided internally threaded fastener which is only 2/3 the thickness of a full form nut.
Applications / Advantages	Jam nuts are tightened against the work surface and a finished or heavy hex nut is tightened against the jam nut to keep it from loosening.
Material	Steel: Nuts shall be made from a low carbon steel which conforms to the following chemical composition requirements—Carbon: 0.47% maximum; Phosphorus: 0.12% maximum; Sulfur: 0.23% maximum. Stainless: Nuts shall be made from one of the following austenitic alloys: 303, 303Se, 304, XM7, all of which have a chromium content of 18% and a nickel content of 8%.

Nylon Insert Lock Nut
Description	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. The nylon insert comes in various colors.
Applications / Advantages	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. Steel nylon insert stop nuts are less expensive than grade-C automation lock nuts. However, nylon will begin to deteriorate at temperatures from 150`-350`F.
Material	Steel: #4 through 5/8”–AISI 1008-1010 or equivalent steel; 3/4 through 11/2” –AISI C1117 or equivalent steel. Stainless: AISI 303 or equivalent stainless steel

Slotted Hex Nut
Description	Hex nut with opposed slots cut into the top of the nut through the centers of the flats. The slots are on the end opposite the bearing surface. Also called a castle nut.
Applications / Advantages	The slots are for the insertion of a cotter pin to secure the nut when used with a drilled shank fastener.
Material	Nuts shall be made from a low-carbon steel which conforms to the following chemical composition requirements—Carbon: 0.47% max.; Phosphorus: 0.12% max.; Sulfur: 0.23% max..

Kep Nut
Description	A hex nut pre-assembled with a free spinning external lock washer. The locking action is achieved when the nut is tightened against a bearing surface as the teeth of the lock washer dig into it.
Applications / Advantages	This is the most popular type of lock nut because of its versatility, cost and ease of installation. Doesn’t gall screw threads.
Material	Steel: Nuts—AISI 1008-1020 or equivalent steel; Washers—1050-03 or equivalent steel. Stainless: Nuts—One of the following austenitic alloys: 303, 303Se, 304, XM7; Washers—SAE 300-305 stainless.