1 1/2-12 x 12 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (12)

The slots are for the insertion of a cotter pin to secure the nut when used with a drilled shank fastener

10-32 x 5 Socket Cap Screw Alloy

50 x 240 Socket Cap Screw 12

7/16-20 x 5 1/2 Hex Cap Screw SS 18-8 (A2)

1/2-13 x 1 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (50) Square Flat-Head Self Drilling Screws with Wings 410 Stainless Steel 1 1/2-12 x 12 L91 2 13 x 1 1 2 Grade 8 Hex Cap Screw Plain Domestic USA (50). Grade 8 Hex Cap Screws are manufactured in the USA from medium carbon alloy steel. In diameters 1 4 to 1 1 2 inches our Grade 8 material meets or exceeds SAE J429 Grade 8 specifications. Diameters over 1 1 2 inches meet or exceed ASTM A354 Grade BD. All material is manufactured with rolled threads. Yellow zinc plated bolting will meet or exceed ASTM F1941. Typical hardness on diameters 1 4