For use with socket head cap screws. High strength and ductility made from carbon steel helical. The design ensures secure locking of socket head cap screws. Per package of 100. SKU: 42639122 MFG: 18007 Shop more products by Imperial. Buy Nuts, Bolts, Screws & Fasteners on sale from largest building hardware materials store in USA 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 $17.5 Sold out $0.14 Quantity Sold Out Sold out Request a Bulk Quote Thank you for your quote request. We will be in touch. DETAILS Description DESCRIPTION Highlights: For use with socket head cap screws High strength and ductility made from carbon steel helical The design ensures secure locking of socket head cap screws Conforms to ANSI B18.21.1 Size: 3/8" Per package of 100 FEATURES MFR: 18007 SKU: 42639122 Brand: Imperial