S-91781A546 1/4"-20 x 1 1/2" 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 with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
- Precision thread engagement through Class 2A fit UNC coarse threads ensures secure fastening and vibration resistance
- Flush mounting capability with standard 82° countersink angle flat head design for smooth surface finishes
- Full threading along 1-1/2" length provides maximum grip and adjustment flexibility in various material thicknesses
- Industry-standard compliance with ASME B18.6.3 specifications guarantees interchangeability and quality assurance
- Environmental regulation adherence through RoHS 3 and REACH compliance for sustainable procurement
Professional Applications & Engineering Value
These 1/4-20 UNC flat head screws deliver critical engineering solutions where corrosion resistance and structural integrity are paramount. The 18-8 stainless steel composition with passivated finish provides exceptional protection against chemical exposure and atmospheric corrosion, making them ideal for marine equipment, food processing machinery, and outdoor structural applications. The fully threaded design with coarse thread spacing ensures rapid installation and superior pull-out resistance in softer materials like aluminum or wood composites. The flat head profile with standard 82° countersink enables seamless flush mounting in precision assemblies where protrusion isn't permissible. These industrial screws solve common fastening challenges by combining high-strength performance with regulatory compliance for demanding B2B applications.
Specification Summary & Compliance
Manufactured to exact ASME B18.6.3 specifications with Class 2A thread fit for consistent dimensional accuracy. Features UNC coarse threads (1/4"-20) with right-hand direction and standard flat head profile. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Mechanical properties include Rockwell B80 hardness and 80,000 psi tensile strength rating.
