5/16 Inch Roll Pin Set, 1-1/4 Inch Long Spring Pin Tension Pin, Heat Treated Steel With Black Finish, Beefy 6-Pack For Auto, Machinery, And DIY Projects

Beefy 5/16 Roll Pin Set: 1-1/4in Heat-Treated, Black, 6-Pack
✔️ 5/16 in dia (7.94 mm), 1-1/4 in long (31.75 mm), steel with black finish

These heavy-duty roll pins are spring pins designed to lock assemblies in automotive, machinery, and DIY projects. Made from heat-treated steel with a durable black finish, they provide reliable retention even under vibration and shock.

✅ Diameter: 5/16 in (7.94 mm)
✅ Length: 1-1/4 in (31.75 mm)
✅ Material: heat-treated steel with black finish
✅ Pack size: 6 pieces
✅ Type: roll pin / tension pin, spring pin
✅ Finish: black oxide for durability

💡 What is a roll pin used for in mechanical assemblies?

It's handy for securing components where movement must be restricted, yet is easy to remove with the right tools.

• Helps retain shafts, gears, and housings under vibration
• Distributes load to prevent stress concentrations and loosening
• Removable with proper tooling for maintenance
• Ideal for auto, machinery, and DIY projects needing quick assembly