Overview
The 18-8 stainless steel hex head cap screw (1/2-13″ x 1-1/4″) is a premium corrosion-resistant fastening solution designed for industrial, commercial, and marine applications. Manufactured to ASME B18.2.1 standards, this screw combines superior strength with excellent corrosion resistance. Each box contains 10 individually produced units meeting strict dimensional and material tolerances.
Key Features
- 18-8 Stainless Steel: Superior corrosion resistance for wet, salty, or chemically aggressive environments
- ASME B18.2.1 Compliant: Meets industry standards for dimensions, head geometry, and thread specifications
- UNC-2A Thread: Standard coarse thread pitch (13 threads per inch) for reliable engagement and ease of installation
- Hex Head Design: Provides excellent grip with standard wrenches and sockets for controlled torque application
- Box of 10: Convenient packaging for small repairs, maintenance, and assembly projects
Technical Specifications
- Diameter: 1/2″ (0.500″)
- Thread Pitch: 13 TPI (threads per inch) UNC-2A
- Length: 1-1/4″ (1.250″)
- Material: 18-8 Stainless Steel (ASTM A240 / SAE J429)
- Head Style: Hex (Hexagonal)
- Standard: ASME B18.2.1, ANSI B1.1
- Finish: Passivated stainless steel
- Quantity per Box: 10 units
Typical Applications
18-8 stainless steel hex cap screws are widely used in:
- Marine and offshore equipment assembly
- Chemical processing and food service machinery
- Water treatment and environmental systems
- Architectural and structural fastening in humid climates
- Laboratory and medical device assembly
- Automotive and transportation component retention
Compatibility & Replacements
Compatible With
- Standard hex wrenches (wrench size for 1/2″ hex cap screw: 3/4″)
- Standard socket sets and impact drivers
- Any application requiring 1/2-13 UNC threaded holes
- Corrosion-resistant fastening systems and assemblies
Replaces / Drop-In Replacement For
- Generic 1/2-13″ x 1-1/4″ hex cap screws in stainless steel
- Any equivalent 18-8 stainless steel hex head cap screw meeting ASME B18.2.1
Works With
- Standard torque wrench calibration (consult installation torque charts for your application)
- Any UNC-compatible threaded hole or insert
- Both metric and inch-based assembly specifications
