S-92949A411 2-56 x 1 1/2" ASME B18.3 Stainless Steel Button Head Hex-Drive 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 thread engagement with Class 3A fit and UNC coarse threads ensuring secure fastening and vibration resistance
• High tensile strength rating of 70,000 psi provides reliable performance in demanding mechanical applications
• Easy installation and removal with hex drive design (0.050") offering positive torque transmission and reduced stripping risk
• Optimized head profile with rounded button design providing a finished appearance while maintaining low clearance requirements
• Full threading along 1-1/2" length delivers maximum grip range and holding power across various material thicknesses
• Compliance with industry standards including ASME B18.3 and environmental regulations (RoHS 3, REACH) for quality assurance

Professional Applications & Engineering Value

Engineered for precision assembly requirements, these 2-56 UNC thread rounded head screws deliver critical performance advantages in industrial applications. The 18-8 stainless steel composition combined with passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for electronics enclosures, machinery components, and outdoor equipment. The hex drive design ensures reliable torque application without cam-out issues, while the Class 3A thread fit maintains precise tolerances for vibration-prone environments. The fully threaded configuration offers maximum engagement depth, solving common challenges with material thickness variations in assembly operations. These button head screws are particularly valuable in applications requiring both aesthetic appeal and mechanical reliability.

Specification Summary & Compliance

This rounded head screw features precision 2-56 UNC coarse threads with Class 3A fit for superior thread engagement. Manufacturing complies with ASME B18.3 specifications ensuring dimensional accuracy and performance consistency. The 18-8 stainless steel material achieves Rockwell B55 hardness and 70,000 psi tensile strength ratings. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming suitability for regulated industries and international markets.