1/4-20 NTU NTU Nylon Insert Heavy Thin Pattern Nut Zinc (Pack Qty 1,000) BC-14NSTH

Thin pattern heavy hex nuts are used when an insufficient number of projecting threads are present to use a full heavy hex nylon insert stop nut. 1/4" through 5/8" -- AISI 1008 - 1010 or equivalent steel; 3/4 through 1"-- AISI C1117 or equivalent steel. Rockwell C 28 maximum.You may also like 5/8-18X3 3/4 Fine Thread Hex Cap Screw Grade 8 Zinc Yellow (Pack Qty 100) BC-6360CH8O.