The Hillman Group 180396 1 1 1 1/4-20 Whiz Lock Nut, 100-Pack Product Description Whiz-Lock, one-piece, all-metal, free-spinning nuts have been proven to overcome vibration and a variety of other forces. The underside, or bearing surface of the fastener, has a series of spiraling serrations, or teeth, to provide a locking, reliable hold. The application of this nut is as simple as spinning it on. From the Manufacturer Whiz-Lock, one-piece, all-metal, free-spinning nuts have been proven to overcome vibration and a variety of other forces. The underside, or bearing surface of the fastener, has a series of spiraling serrations, or teeth, to provide a locking, reliable hold. The application of this nut is as simple as spinning it on. Features A Whiz-Lock Nut is the brand name for a reusable, serrated flange lock nut Whiz-Lock nuts are resistant to being loosened by torque or vibrations Zinc-plated for moderate corrosion resistance Country of Origin: China USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.