S-95635A551 1/4"-20 x 1 1/2" ASME B18.3 Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws
Tamper-Resistant Hex-Drive Stainless Steel Button 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 tamper resistance with specialized hex drive design to prevent unauthorized access in secure installations
- Exceptional corrosion protection through 18-8 stainless steel construction and passivated surface treatment
- High-load bearing capability with 70,000 PSI tensile strength for demanding industrial applications
- Precision thread engagement with Class 3A UNC coarse threads ensuring reliable fastening performance
- Enhanced durability with Rockwell B70 hardness maintaining structural integrity under stress
- Full-threaded design providing maximum grip length and uniform load distribution
- Regulatory compliance meeting ASME B18.3 standards and environmental regulations for global applications
Professional Applications & Engineering Value
This tamper-resistant hex screw delivers critical security and reliability for industrial applications where unauthorized access prevention is paramount. The 18-8 stainless steel composition combined with passivated finish creates a robust barrier against corrosive environments, extending service life in manufacturing facilities, outdoor equipment, and public infrastructure. The Class 3A thread fit and UNC coarse threading ensure rapid installation with superior vibration resistance, while the rounded button head profile provides a finished appearance without sharp edges. Engineered for security-conscious applications including access panels, machinery guards, and public fixtures, this fastener maintains integrity in high-stress environments while meeting stringent industry specifications.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread tolerance for precision fit. Features 1/4"-20 UNC coarse threads with full threading along the 1-1/2" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The 5/32" tamper-resistant hex drive provides secure installation while the 0.437" head diameter ensures proper bearing surface.
