S-95635A536 1/4"-20 x 3/8" ASME B18.3 Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Superior tamper resistance with specialized hex drive requiring matching tools, preventing unauthorized access in sensitive applications
• Excellent corrosion resistance through 18-8 stainless steel construction and passivated surface treatment for extended service life
• High mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for demanding industrial environments
• Precise Class 3A thread fit ensuring secure fastening and vibration resistance in UNC coarse thread applications
• Low-profile button head design providing smooth rounded appearance while maintaining substantial bearing surface
• Full threading capability allowing complete engagement through materials for maximum holding power
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations for global industrial use

Professional Applications & Engineering Value

These tamper-resistant hex button head screws address critical security and durability challenges in industrial settings. The 18-8 stainless steel composition combined with passivated finish provides exceptional resistance to corrosion, making them ideal for harsh environments where moisture or chemicals are present. The specialized 5/32" tamper-resistant drive prevents unauthorized removal, securing valuable equipment in public facilities, transportation, and electronic enclosures. With Class 3A thread fit and UNC coarse threading, these fasteners deliver reliable performance in vibration-prone applications while the fully threaded design ensures maximum grip length. The rounded button head profile offers both aesthetic appeal and safety by eliminating sharp edges, making them suitable for consumer-facing products and machinery where user contact is possible.

Specification Summary & Compliance

This 1/4"-20 x 3/8" screw features precision Class 3A thread fit with UNC coarse threading standards. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy and performance. The product is certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental regulations for hazardous substance restrictions. The passivated finish on 18-8 stainless steel provides enhanced corrosion protection while maintaining the material's inherent strength characteristics of 70,000 psi tensile strength.