Bulk 5/16"-24 Socket Head Cap Screws – Alloy Steel, Black Oxide – USA Made – Monster Bolts DIN 931 Each heat-treated carbon-steel screw receives

Each heat-treated carbon-steel screw receives a deep black-oxide conversion finish for low-glare corrosion protection

Versatile Options: Available in both Tap Bolt (Full Thread) and Partial Thread for various applications

Zinc plated with CR+6 for corrosion resistance and baked to reduce hydrogen embrittlement risks

These Plain Steel Split Lock Washers are perfect for use in indoor applications where vibration

Bulk 5/16"-24 Socket Head Cap Screws – Alloy Steel, Black Oxide – USA Made – Monster Bolts DIN 931 Each heat-treated carbon-steel screw receivesMonster Overview: Proudly Made in the USA, these Bulk 5 16" 24 Socket Head Cap Screws are manufactured from premium alloy steel and finished with a uniform thermal black oxide coating. The fine thread UNF design allows for superior clamp control and vibration resistance, making these ideal for precision assemblies and critical mechanical connections. All Monster Bolts USA made black oxide socket fasteners are fully RoHS compliant and ship fast from