S-95235A536 1/4"-20 x 5/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent nylon patch that maintains secure fastening even under continuous stress and temperatures up to 250°F
• Superior thread engagement thanks to Class 3A UNC coarse threads ensuring precise, reliable fits in demanding industrial applications
• Enhanced grip and alignment from the extended tip design, which increases surface contact and prevents component slippage
• High-strength durability with Rockwell C45 hardened alloy steel construction, resisting wear and deformation under heavy loads
• Easy installation and removal using a standard 1/8" hex drive, allowing quick maintenance without specialized tools
• Broad compliance assurance meeting ASME B18.3, ASTM F912, RoHS 3, and REACH standards for safe, regulated use in global markets
• Optimized for right-hand threading in assemblies requiring consistent, unidirectional torque and secure fastening

Professional Applications & Engineering Value

This alloy steel set screw is engineered to address common industrial challenges like vibration-induced loosening and misalignment in machinery. The nylon patch thread locker chemically bonds with mating threads, creating a permanent seal that withstands operational temperatures up to 250°F, ideal for motors, conveyor systems, and automotive components. Its extended tip and UNC coarse threads provide maximum bite into shafts and collars, distributing clamp force evenly to prevent joint failure. With Class 3A thread fit and hex headless design, it ensures flush mounting in tight spaces while maintaining high torque resistance. These features make it a reliable choice for securing gears, pulleys, and handles in heavy-duty equipment, reducing maintenance downtime and enhancing assembly integrity.

Specification Summary & Compliance

This set screw adheres to Class 3A external thread fit per UNC standards, ensuring tight tolerances for precision assemblies. Manufacturing complies with ASME B18.3 and ASTM F912 specifications, guaranteeing consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming the absence of hazardous substances. Dimensions include a 1/4"-20 thread size, 5/8" length, and 1/8" hex drive, with tip diameter and length tolerances tightly controlled for reliable application fit.