Serrated Flange Hex Bolts 5/16 Inch-18 X 1 Inch Built Tough Zinc Plated Case Hardened 25 Pack Built-In Flange With Serrations That Grip Surfaces No Washer Needed For Use With Nuts

Serrated Flange Hex Bolts 5/16-18 x 1 in, zinc, 25-pack
✔️ Built-in flange with serrations for grip and no washer

These serrated flange hex bolts measure 5/16-18 x 1 inch, zinc-plated and case-hardened, packed 25 per set. They feature a built-in flange under the head that distributes load evenly and eliminates the need for a separate washer, making surface protection a plus in many projects. Use with matching nuts or threaded holes of the same size for secure, reliable fastening in automotive, appliance, furniture, and outdoor equipment applications.

✅ Size: 5/16-18 x 1 in (7.94 mm x 25.40 mm)
✅ Hex bolt with serrated flange under head
✅ Built-in flange eliminates separate washer
✅ Serrations bite into surface to resist loosening
✅ Pack size: 25 bolts in the set
✅ Finish: zinc plated for corrosion resistance

💡 What is a flange bolt used for in everyday repairs and builds?

A handy explanation: - Built-in flange provides load distribution and surface protection - Washerless design reduces parts and speeds assembly - Serrations help resist loosening under vibration - Works with nuts or threaded holes of size 5/16-18