Engineered for heavy-duty assemblies, these Hex Head Cap Screws are made from Grade 8 steel with a plain finish and fine thread for reliable, high-strength fastening in demanding environments. The 1 3/8-12 size and 5 1/2″ length (PT) are designed for precise fit in machinery, equipment, and structural applications.

Key features

• High-strength Grade 8 steel: rugged performance for critical fastenings.
• Plain finish: ready for painting, coating, or optional surface treatment.
• Fine thread: improved adjustment, better clamp load distribution, and vibration resistance.
• Hex head drive: provides easy tool access with standard wrenches or sockets.
• Size and length: 1 3/8-12 thread with 5 1/2″ length (PT).
• Right-hand thread: standard configuration suitable for most applications.

Applications

Perfect for automotive, industrial, and heavy equipment assemblies where high-strength fasteners are required. Use with tapped holes or nuts that match 1 3/8-12 UNC threads. The plain finish accepts paint or protective coatings to suit your project needs.

Specifications

• Material: Grade 8 steel
• Finish: Plain
• Thread size: 1 3/8-12
• Length: 5 1/2″ (PT)