S-94115A307 1/4"-28 x 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with green nylon 6/6 plastic tip to maintain secure fastening in dynamic industrial environments
• Superior corrosion protection through black-oxide coating on alloy steel for extended service life in demanding conditions
• Precision thread engagement with Class 3A UNF fine threads ensuring reliable, tight fits in critical assemblies
• High-strength performance backed by Rockwell C28 hardness for exceptional load-bearing capacity
• Wide temperature tolerance from -50° to 250°F (-45° to 121°C) for stable operation across diverse environments
• Space-saving headless design with 1/8" hex drive for installations where clearance is limited
• Industry compliance assurance meeting ASME B18.3 specifications for guaranteed interoperability

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions for machinery, automotive, and precision equipment applications where vibration-induced loosening compromises safety and performance. The UNF Class 3A fine threads provide exceptional clamping force distribution, while the nylon 6/6 plastic tip creates permanent friction locking without damaging shaft surfaces. The headless hex drive design enables flush mounting in confined spaces, making it ideal for adjustable collars, gears, and pulleys. With temperature resistance from -50° to 250°F, it maintains reliability in both industrial freezing conditions and high-heat environments, eliminating the need for secondary locking mechanisms and reducing assembly costs.

Specification Summary & Compliance

Manufactured to ASME B18.3 standards with Class 3A thread fit precision for superior engagement tolerance. The 1/4"-28 UNF fine thread configuration ensures optimal load distribution. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming safe use in regulated industries. The alloy steel construction with black-oxide surface treatment provides consistent performance across the specified temperature range of -50° to 250°F.