Five Pack Heavy Duty Alloy Steel Shoulder Bolts, Three Eighths Inch Shoulder Diameter, One Inch Shoulder Length, Five Sixteenths-18 UNC Threads, Hex Socket Drive, Grade 12.9, ISO7979, Fully Threaded, Silver Finish, Precision Machined, 1.77 Inch Overall
UPC:
✔️ 3/8 in shoulder dia, 1 in length, 5/16-18 UNC, hex socket
These heavy-duty shoulder bolts are precision-machined alloy steel fasteners designed for precise alignment and smooth pivoting in automotive, industrial machinery, and general mechanical assemblies. The 3/8" shoulder diameter and 1" shoulder length create a robust guide surface, while the 5/16-18 UNC threads provide reliable mating with compatible components. The set includes 5 pieces with a black oxide finish and silver tone for durability. ISO7979 compliance and Grade 12.9 ensure strength and dimensional accuracy.
✅ Material: Alloy steel with black oxide finish
✅ Finish: Silver tone with black oxide
✅ Drive type: Hex socket head
✅ Thread: 5/16-18 UNC; thread length 12 mm (0.47 in)
✅ Shoulder diameter: 3/8 in (9.525 mm)
✅ Shoulder length: 1 in (25.4 mm)
✅ Pack size: 5 pieces
✅ ISO7979 compliant, Grade 12.9
💡 What is a shoulder bolt used for in precision mechanical assemblies?
This handy fastener guides motion and provides a fixed pivot point for rotating parts.
- It creates a precise shoulder surface for alignment
- The hex socket head enables easy installation with common tools
- Grade 12.9 alloy steel offers high strength for demanding setups