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$25.99
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SPECIFICATIONS
Heat treated Hex nut with a nylon-filled collar at its back end. The grade-5 nut shall be marked with a dot and dash on the chamfered surface of the nut, 120° apart. The grade-8 nut shall be grade-marked in one of two ways: (1) with double notched corners or (2) with six symmetrically spaced identical symbols on the chamfered surface on top of the nut. When the cap-screw or bolt reaches the collar, the threads and nylon form a tight, frictional fit, restricting movement of the cap-screw or bolt when it is subjected to vibration. The nylon insert comes in various colors. Designed to be used in structural applications with Grade-8 cap-screws or bolts which have a minimum tensile strength of 150,000 psi. or greater. Some such applications include engines, turbines, hydraulic cylinders,
railroads and aerospace. Nylon insert nuts are not designed to be used at temperatures over 250° F.