S-90251A256 10-32 x 3/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent nylon patch that maintains secure fastening even under continuous stress
• Superior corrosion resistance thanks to 18-8 stainless steel construction for long-term reliability in harsh environments
• Precise thread engagement with Class 3A fit ensuring consistent performance and reduced risk of cross-threading
• Wide temperature tolerance from -50° to 250°F for stable performance across diverse operating conditions
• Space-saving headless design with hex drive for flush mounting in confined assemblies
• Enhanced grip from cup tip design that digs into shaft materials for superior anti-rotation performance
• Industry compliance meeting ASME B18.3 standards for reliable interchangeability and quality assurance

Professional Applications & Engineering Value

This 10-32 UNF set screw with nylon patch thread locker solves critical vibration-induced loosening problems in precision assemblies. The 18-8 stainless steel construction provides excellent corrosion resistance for demanding environments like marine equipment, food processing machinery, and outdoor industrial applications. The Class 3A thread fit ensures precise engagement with mating components, reducing installation torque variations and preventing damage to expensive machinery parts. The headless hex drive design allows for flush mounting in space-constrained applications while the cup tip provides superior biting action on shafts and collars. With temperature stability from -50° to 250°F, this industrial set screw maintains locking performance across extreme operating conditions, making it ideal for permanent assemblies in automotive, aerospace, and heavy equipment applications where reliability is paramount.

Specification Summary & Compliance

This set screw features 10-32 UNF fine threads with Class 3A thread fit for precision engagement and 3/8" length for standard applications. Manufactured to ASME B18.3 specifications ensuring dimensional consistency and reliable performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental standards for industrial use. The nylon patch thread locker provides permanent locking capability while the Rockwell B80 hardness ensures durability and resistance to wear during installation and service life.