S-94135A823 1/4"-20 x 3/8" Tamper-Resistant Drilled Spanner Stainless Steel Truss Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish for long-term reliability in harsh environments
• Superior load distribution through the wide truss head design that prevents surface damage and provides enhanced clamping force
• High mechanical strength with 70,000 psi tensile rating and Rockwell B87 hardness for demanding industrial applications
• Precise thread engagement with Class 2A fit and UNC coarse threading ensuring reliable fastening and vibration resistance
• Secure installation control via drilled spanner drive (No. 14) that prevents cam-out and allows for high-torque applications
• Full thread coverage along the 3/8" length for maximum grip strength and uniform stress distribution
• Regulatory compliance with RoHS 3 and REACH standards for environmentally responsible manufacturing

Professional Applications & Engineering Value

These 1/4-20 UNC rounded truss head screws deliver critical engineering solutions where vibration resistance and corrosion protection are paramount. The combination of 18-8 stainless steel material and passivated surface treatment creates a durable barrier against chemical exposure and atmospheric corrosion, making them ideal for marine, food processing, and outdoor equipment applications. The wide truss head profile distributes clamping force over a larger surface area, preventing material deformation in softer substrates while the drilled spanner drive ensures positive engagement during installation, eliminating stripping concerns in high-torque scenarios. With fully threaded coarse spacing, these fasteners provide maximum thread engagement for superior holding power in demanding mechanical assemblies.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread spacing (1/4"-20), these screws maintain consistent tolerance specifications. The 3/8" length and 0.573" head diameter provide standardized dimensions for reliable interchangeability. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmentally responsible manufacturing practices and material safety standards are met for global industrial applications.