S-91857A546 1/4"-20 x 1 1/2" ASME B18.6.3 Stainless Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance in harsh environments due to 316 stainless steel construction and passivated surface treatment
• Reliable mechanical performance with 100,000 psi tensile strength and Rockwell B100 hardness for demanding applications
• Optimized thread engagement through UNC coarse threading and Class 2A fit ensures secure fastening and vibration resistance
• Full-length threading provides maximum grip length and installation flexibility across various material thicknesses
• Industry-standard compliance with ASME B18.6.3 specifications guarantees dimensional accuracy and interchangeability
• Simplified installation and removal with slotted drive design compatible with standard screwdrivers
• Environmental regulation compliance meeting RoHS 3 and REACH requirements for safe use in regulated industries

Professional Applications & Engineering Value

This 316 stainless steel rounded head slotted screw delivers critical performance advantages in challenging industrial environments where corrosion resistance and mechanical reliability are paramount. The combination of marine-grade 316 stainless steel and passivated finish provides superior protection against saltwater, chemicals, and atmospheric corrosion, making it ideal for marine equipment, chemical processing plants, and outdoor infrastructure. The UNC coarse thread design ensures rapid installation and superior holding power in softer materials, while the Class 2A thread fit maintains precise tolerances for consistent performance. The fully threaded 1-1/2" length offers versatile application across various material thicknesses, from heavy machinery assembly to structural fastening in construction and manufacturing sectors where vibration resistance and long-term durability are essential.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit tolerances per ASME B18.6.3 specifications with 1/4"-20 UNC coarse threads in right-hand orientation. Manufacturing complies with ASME B18.6.3 standards for dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for hazardous substance restrictions.