S-91249A631 8-32 x 4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws
Stainless Steel Pan Head Phillips 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
- Enhanced corrosion resistance with black-oxide coated 18-8 stainless steel construction, ideal for humid or chemically aggressive environments
- Superior tensile strength of 70,000 psi ensures reliable fastening under high-stress conditions without failure
- Optimized drive engagement through No. 2 Phillips drive style, reducing cam-out and improving installation efficiency
- Full threading along the 4" length provides maximum grip and uniform load distribution across joined materials
- Precise UNC coarse threading with Class 2A fit guarantees consistent, vibration-resistant connections in industrial assemblies
- Compliance with ASME B18.6.3 ensures dimensional accuracy and interchangeability for maintenance and replacement
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory standards
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these black-oxide 18-8 stainless steel screws combine material durability with functional design to address common engineering challenges. The pan head profile and Phillips drive facilitate quick installation in tight spaces, while the UNC coarse thread resists loosening under dynamic loads. Fully threaded along the 4" shank, they ensure maximum thread engagement in thick materials or stacked components, reducing the risk of joint failure. Ideal for machinery, electrical enclosures, and outdoor equipment, the corrosion-resistant coating extends service life in harsh conditions, minimizing maintenance downtime and replacement costs.
Specification Summary & Compliance
This screw features a Class 2A thread fit per UNC standards, ensuring precise tolerance for reliable assembly. Manufactured in compliance with ASME B18.6.3 for dimensional consistency, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming adherence to restricted substance guidelines. The combination of a 0.322" head diameter, 4" length, and coarse threading supports robust performance in industrial fastening applications.
