PennEngineering® Trident Heat-Treated Carbon Steel Locknuts - Type SL - Unified SL-0420-2ZI

SL-0420-2ZI is a self-clinching locknut with a TRI-DENT® locking feature, designed for use in sheets with a Rockwell B hardness of 80 or less and Brinell hardness of 150 or less. It is a 1/4-20 thread size with a shank depth of 1.38 mm and a maximum sheet thickness of 0.344 inch, suitable for applications requiring a cost-effective prevailing torque locking solution. The locking feature provides 3-cycle performance when used with steel socket head cap screws of 180 ksi / property class 12.9 with thermal oxide and light oil finish. Both the clinching profile and locking feature appearance may vary without affecting performance, and the part is compatible with a minimum hole-to-edge distance of 0.34 inch. All SL locknuts are made to maintain fastening strength up to 800°F / 426°C, though temperatures above 300°F / 149°C may dehydrate the conversion coating.