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) Part of the Monster Bolts

Part of the Monster Bolts Made in USA Fasteners Collection

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

Pair these bolts with USA-made 3/8-16 nuts and washers for a complete installation:

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

and daily wear without losing integrity

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) Part of the Monster BoltsMonster 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