Overview
The 18-8SS hex head cap screw 1/2-13 x 3-3/4″ is a corrosion-resistant fastener made from 304 stainless steel. These screws feature a standard hex head design and coarse UNC threads, conforming to ASME B18.2.1 specifications. Supplied in a box of approximately 15 units, these fasteners are ideal for environments where atmospheric corrosion resistance is critical.
Key Features
- 18-8 (304) stainless steel construction resists corrosion in chemical and marine environments
- Hex head design allows use with standard wrenches and sockets
- 1/2-13 UNC coarse thread standard specifications for reliable fastening
- 3-3/4″ length provides deep penetration for multi-layer assemblies
- Plain finish, fully threaded for maximum engagement length
- Box of ~15 screws, ideal for maintenance stocking and small-batch assembly
Technical Specifications
Material: 18-8 Stainless Steel (304)
Thread Size: 1/2-13 UNC (Coarse)
Length: 3-3/4 inches
Head Style: Hex
Finish: Plain
Torque Range: Typically 100-140 ft-lbs (full engagement, lubricated)
Standards: ASME B18.2.1
Operating Temperature: -58°F to +302°F (-50°C to +150°C)
Quantity Per Box: Approximately 15 units
Typical Applications
- Chemical and food processing equipment assembly
- Marine and saltwater environments
- Outdoor industrial installations
- HVAC and water treatment systems
- Agricultural and landscape equipment
- General maintenance and repair fastening
Compatibility & Replacements
Compatible With
- Standard 1/2″ hex wrenches and sockets (13/16″ across flats)
- Any assembly or structure designed for 1/2-13 UNC fasteners
- Applications requiring ASME B18.2.1 compliant fasteners
- Stainless steel and carbon steel base materials
Replaces / Drop-In Replacement For
This 18-8SS hex head cap screw 1/2-13 x 3-3/4″ is a direct replacement for any equivalent hex cap screw of the same specifications. Common equivalent part numbers across distributors use similar sizing notation (1/2″-13 UNC x 3-3/4″ SS).
Works With
- Stainless steel washers (flat or lock) — recommended for load distribution
- 18-8 stainless steel nuts in 1/2-13 UNC pitch
- Standard mechanical and pneumatic assembly tools
- All general industrial fastening systems
