S-91858A542 1/4"-20 x 1" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws
Stainless Steel Slotted 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 in harsh environments due to 316 stainless steel construction and passivated finish
- Reliable high-strength performance with 70,000 psi tensile strength and Rockwell B80 hardness for demanding applications
- Precise flush mounting enabled by the standard 82° countersink angle and flat head design
- Easy manual installation and removal with slotted drive style and right-hand coarse UNC threading
- Consistent thread engagement ensured by Class 2A thread fit and full threading along the 1" length
- Compliance with industry standards including ASME B18.6.3 for dimensional accuracy and reliability
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for safe usage
Professional Applications & Engineering Value
These 1/4"-20 UNC flat head screws in 316 stainless steel are engineered to solve critical challenges in corrosive and high-stress environments. The passivated finish enhances the natural corrosion resistance of the material, making these flat head slotted screws ideal for chemical processing, marine applications, and outdoor equipment where exposure to moisture, salts, and chemicals is common. The coarse thread spacing and Class 2A thread fit provide quick assembly and reliable holding power, reducing installation time while maintaining joint integrity. Fully threaded along the 1" length, they ensure maximum grip in thin materials or pre-tapped holes, offering engineers a dependable industrial fastener that minimizes maintenance and replacement costs in aggressive operational settings.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC thread with Class 2A fit for standard tolerance, coarse thread spacing, and full threading over the 1" length. Manufacturing and dimensional accuracy adhere to ASME B18.6.3 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets current environmental and safety standards for industrial use.
