Collared prevailing torque metal locknuts are used in applications where assemblies are subject to vibration

3/4 x 7 Hex Lag Screw Zinc Plated

Tensile strength on diameters 1/4 to 2 1/2 inches is a minimum of 150

1 1/2-6 x 11 Socket Cap Screw Alloy

5/8-11 x 2 Hex Tap Bolt Silicon Bronze

1/4-20 x 3 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (550) Wedge Anchors 316 Stainless Steel Collared prevailing torque metal locknuts1 4 20 x 3 1 2 Grade 8 Hex Cap Screw Plain Domestic USA (550). Grade 8 Hex Cap Screws are manufactured in the USA from medium carbon alloy steel. In diameters 1 4 to 1 1 2 inches our Grade 8 material meets or exceeds SAE J429 Grade 8 specifications. Diameters over 1 1 2 inches meet or exceed ASTM A354 Grade BD. All material is manufactured with rolled threads. Yellow zinc plated bolting will meet or exceed ASTM F1941. Typical hardness on diameters 1 4