Bulk 5/16"-18 Socket Head Cap Screws – Coarse Thread, Alloy Steel, Black Oxide – Monster Bolts Length:300 QTY - 5/16"-18 x 3-1/2" (PT) Quality & Supply: Each bulk

Quality & Supply: Each bulk lot meets Monster Bolts’ rigorous strength

Large HVAC Installations

Standards: Built to DIN 9427 / ISO 7380 geometry for universal compatibility

Expect consistent fit

Our 3/8"-16 Hex Flange Screws are meticulously engineered for applications that demand exceptional strength and reliability

Bulk 5/16"-18 Socket Head Cap Screws – Coarse Thread, Alloy Steel, Black Oxide – Monster Bolts Length:300 QTY - 5/16"-18 x 3-1/2" (PT) Quality & Supply: Each bulkMonster 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