S-92240A439 1/2"-20 x 2 1/4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws
18-8 Stainless Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
- High tensile strength of 80,000 psi ensures reliable fastening in demanding industrial applications
- Superior thread engagement through UNF fine spacing and Class 2A thread fit for vibration resistance
- Easy installation and removal with external hex drive design and 3/4" head width for standard tool compatibility
- Full threading along the 2 1/4" length provides maximum grip and load distribution
- Consistent hardness (Rockwell B70) maintains structural integrity under repeated stress
- Comprehensive regulatory compliance including ASME B18.2.1, RoHS 3, and REACH for global acceptance
Professional Applications & Engineering Value
These 18-8 stainless steel hex head screws deliver critical performance advantages in industrial settings where corrosion resistance and structural integrity are paramount. The UNF fine thread configuration with Class 2A thread fit provides superior vibration resistance compared to coarse threads, making them ideal for machinery, equipment assembly, and structural applications subject to dynamic loads. The combination of 80,000 psi tensile strength and Rockwell B70 hardness ensures these external hex drive fasteners maintain clamping force under extreme conditions. Their fully threaded design maximizes contact surface area, distributing stress evenly to prevent joint failure in heavy-duty fastening scenarios across manufacturing, construction, and marine industries.
Specification Summary & Compliance
This 1/2"-20 UNF hex head screw features precise Class 2A thread fit tolerances and fine thread spacing manufactured to ASME B18.2.1 specifications. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance. With dimensions of 2 1/4" length, 3/4" head width, and right-hand threading, these screws meet industrial standards for reliability and interchangeability.
