S-91772A109 4-40 x 7/16" 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 passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
- Precision thread engagement through Class 2A fit UNC coarse threading, ensuring secure fastening and vibration resistance
- Optimized drive efficiency with No. 1 Phillips drive and rounded pan head design for easier installation and reduced cam-out
- Full-threaded coverage along the 7/16" length provides maximum grip and uniform stress distribution
- Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
- Dimensional consistency with standardized inch measurements ensuring interchangeability and simplified inventory management
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 4-40 UNC machine screws deliver critical performance where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against oxidation and chemical exposure, making them ideal for manufacturing equipment, electronic enclosures, and marine components. The combination of fully threaded design and Class 2A thread fit ensures maximum surface contact and vibration resistance in assemblies subject to dynamic loads. The rounded pan head with Phillips drive offers streamlined installation in confined spaces while maintaining sufficient torque transmission. These screws solve common fastening challenges in corrosive environments by maintaining 70,000 psi tensile strength and dimensional stability under continuous operational stress.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 standards with Class 2A thread fit and UNC coarse threading (4-40). Features include 7/16" length, No. 1 Phillips drive, and full threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Material certification confirms 18-8 stainless steel with passivation treatment and mechanical properties including Rockwell B70 hardness and 70,000 psi tensile strength.
