Greater resistance to loosening from vibration. Zinc; yellow plating for corrosion resistance. Tempered for non-linking positive locking. Per package of 250. SKU: 42612776 MFG: 76173 Shop more products by Imperial. We offer lowest price on Nuts, Bolts, Screws & Fasteners. With Life and Home you always get the best deals SHARE Share on Facebook Tweet on Twitter Share on Google+ Pin on Pinterest Shipping not available to AK,AE,AA,AE,AE,AE,AP,GU,HI,PR,VI Free shipping over $35 Sold out $0.11 Quantity Sold Out Sold out Request a Bulk Quote Thank you for your quote request. We will be in touch. DETAILS Description DESCRIPTION Highlights: Size: 7/16" SAE approved alloy coil spring steel Tempered for non-linking positive locking Greater resistance to high temperature Not brittle at low temperature Greater resistance to loosening from vibration Tighter assemblies due to greater bolt tension per unit of torque Zinc; yellow plating for corrosion resistance ASME B18.21.1 approved ASTM B633 Type II SC1 Per package of 250 FEATURES MFR: 76173 SKU: 42612776 Brand: Imperial