4-40 NTM Thin Pattern Nylon Insert Hex Lock Nut 18 8 Stainless Steel (Pack Qty 2,000) BC-04NST188

Same general applications as the standard pattern, but thin pattern nuts are used when an insufficient number of projecting threads are present to use a standard nylon insert nut. Steel: #4 through 5/8” diameters: AISI 1008 - 1010 or equivalent steel. 3/4” diameter: AISI C1117 or equivalent steel. Stainless: 18-8: Type 303 or equivalent stainless steel. 1/4 through 5/8: Rockwell B95 - C32; 3/4 through 1-1/2”: Rockwell B80 - C32