S-91772A113 4-40 x 3/4" 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
- Superior corrosion resistance from 18-8 stainless steel with passivation, ideal for harsh industrial environments
- Exceptional tensile strength of 70,000 psi ensures reliable, long-lasting fastening under high-stress conditions
- Rockwell B70 hardness provides excellent wear resistance and maintains thread integrity through repeated use
- Class 2A thread fit with UNC coarse threading enables quick assembly and reduces cross-threading risks
- Pan head design with Phillips No. 1 drive offers secure tool engagement and flush mounting capabilities
- Full threading along the 3/4" length maximizes grip strength and distributes load evenly across the fastener
- Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH ensures regulatory acceptance and environmental safety
Professional Applications & Engineering Value
These 4-40 UNC coarse thread pan head screws deliver critical performance advantages in demanding industrial applications where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction effectively resists oxidation and chemical degradation in manufacturing, marine, and outdoor equipment. The combination of 70,000 psi tensile strength and Rockwell B70 hardness ensures these Phillips drive screws maintain clamping force in vibrating environments while the Class 2A thread fit provides consistent engagement without galling. The fully threaded design across the entire 3/4" length offers superior pull-out resistance in sheet metal, plastics, and electronic enclosures where secure fastening is essential for product integrity.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse threading (4-40 size). Complies with ASME B18.6.3 mechanical specifications and maintains RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance. Features include 0.219" head diameter, fully threaded 3/4" length, and Phillips No. 1 drive style.
