S-92210A555 1/4"-20 x 3" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive Flat 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
- Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
- Precise thread engagement with Class 3A fit and UNC coarse threads ensuring reliable fastening and vibration resistance
- High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Optimal flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
- Enhanced torque transmission through hex drive design preventing cam-out and enabling secure installation
- Full thread coverage along the 3" length providing maximum grip and load distribution
- Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH
Professional Applications & Engineering Value
This 1/4"-20 flat head hex drive screw delivers exceptional engineering value through its 18-8 stainless steel composition and passivated finish, providing critical corrosion resistance for industrial equipment, marine components, and food processing machinery where moisture and chemicals are present. The Class 3A thread fit with UNC coarse threading ensures rapid assembly and maintains integrity under vibration, while the hex drive design prevents stripping during high-torque applications. The 82° countersink and flat head profile create flush surfaces in machinery, enclosures, and structural assemblies, eliminating protrusions that could interfere with operation. With full threading across its 3" length, it offers complete engagement for heavy-load applications where shear strength and pull-out resistance are paramount.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and UNC coarse thread profile (1/4"-20). Features include 82° countersink angle, right-hand thread direction, and full threading along the 3" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
