Bulk 5/16"-18 Socket Head Cap Screws – Coarse Thread, Alloy Steel, Black Oxide – Monster Bolts Length:500 QTY - 5/16"-18 x 2-1/4" (PT) Choose the right length and

Choose the right length and bulk quantity above and click "Add to Cart" to keep your operation supplied with dependable UNF hardware

Power your toughest builds with Bulk 3/8"-16 Grade 8 Hex Cap Screws in a corrosion-resistant zinc yellow CR+3 finish

SAE J429 Grade 8 mechanical properties System of Measurement Inch / SAE Lengths Available Available in common 5/8-18 lengths

Alloy Steel

Bulk 5/16"-18 Socket Head Cap Screws – Coarse Thread, Alloy Steel, Black Oxide – Monster Bolts Length:500 QTY - 5/16"-18 x 2-1/4" (PT) Choose the right length andMonster Overview: Fix your project right the first time with Bulk 5 16 18 Socket Head Cap Screws from Monster Bolts. These heavy duty fasteners are made from premium alloy steel and finished with a thermal black oxide coating for mild corrosion resistance and a sleek, uniform appearance. Ideal for machinery, tooling, robotics, and structural assemblies requiring maximum strength and precision alignment. All Monster Bolts black oxide socket fasteners