US Size : #8
Thread Size : 32 TPI - UNC Coarse Thread
Type : "K" Lock Nut with Exterior Tooth Lock Washer
Specification : Shakeproof* #501-01
Wrench Size : 11/32"
Material : Stainless Steel: Nuts - 302, 303, 303Se, 304 or XM7; Washers - 420 stainless
*Shakeproof is the original writer for these specifications