2.1& ASTM F593. The 6 sided head makes them easy to install using a standard wrench or socket tool.Size: 5/16 inch-18 X 1 inchOne of the most common and versatile fastenersDesigned for use with a nut or a threaded hole of the same diameter and thread sizeFeatures a 6 sided head and can be fastened using a wrench or socket toolNuts & washers not includedThread Type: Coarse, Thread Class: UNC-2A, Point Style: BluntSpecification(s) Met: ASME B18.
Used by numerous homeowners as added security at home or the officeUsed to cover door viewer and peepholes from the inside9/16 in. inside diameter with 1-1/2 in. outside diameter cover for privacy and easy gripping. Brown Plastic Fixed Privacy Cover Privacy covers feature a large 1-1/2 in.