S-91783A641 3/8"-16 x 4" ASME B18.6.3 Stainless Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance through 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Superior mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable, heavy-duty applications
• Precise thread engagement with Class 2A thread fit and UNC coarse threads ensuring consistent, vibration-resistant fastening
• Optimized load distribution from the rounded head design and partial threading, reducing stress concentration points
• Broad regulatory compliance meeting ASME B18.6.3 standards, RoHS 3, and REACH for global industrial use
• Easy installation and maintenance with standard slotted drive and right-hand threading for straightforward assembly
• Dimensional reliability with 4" length and 3/8"-16 thread specifications ensuring consistent performance across assemblies

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 3/8"-16 UNC partially threaded rounded head screws deliver critical performance advantages. The 18-8 stainless steel core provides inherent corrosion resistance, while the passivated finish creates an additional protective oxide layer, significantly extending service life in moisture-rich or chemically aggressive settings. The partial threading design optimizes clamp load distribution, preventing joint loosening under vibration while maintaining precise alignment in machinery assembly, structural frameworks, and heavy equipment. With 100,000 psi tensile strength and coarse UNC threads, these fasteners ensure rapid installation and reliable performance in high-stress applications where fastener failure is not an option.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with Class 2A thread fit and UNC coarse thread profile (3/8"-16) on a 4" partially threaded shank. These rounded head screws comply with ASME B18.6.3 specifications for dimensional consistency and mechanical performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and workplace safety standards are met for global industrial applications.