S-91793A109 4-40 x 7/16" ASME B18.6.3 Stainless Steel Binding Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for heavy-duty binding applications
• Reliable coarse threading with 4-40 UNC Class 2A fit ensures secure fastening and vibration resistance
• Wide rounded binding head design provides excellent bearing surface and prevents loosening under stress
• Full threading capability allows for maximum engagement depth and superior holding power
• Standard-compliant manufacturing meets ASME B18.6.3 specifications for consistent quality and interchangeability
• Environmental compliance with RoHS 3 and REACH regulations for safe use across various industries

Professional Applications & Engineering Value

These 4-40 UNC rounded head binding screws in 18-8 stainless steel deliver critical performance in demanding industrial settings. The combination of coarse threading and Class 2A thread fit provides excellent engagement in various materials while resisting vibration-induced loosening. The passivated finish significantly enhances corrosion resistance, making these slotted binding screws ideal for electrical components, machinery assemblies, and binding applications where moisture or chemical exposure is a concern. The wide rounded head profile distributes clamping force evenly, preventing damage to sensitive surfaces while maintaining secure fastening under heavy loads. Engineered to meet ASME B18.6.3 standards, these industrial fasteners ensure reliable performance in automotive, electronics, and manufacturing applications where precision and durability are paramount.

Specification Summary & Compliance

This 7/16" length screw features precise 4-40 UNC coarse threading with Class 2A thread fit per ASME standards, ensuring consistent dimensional accuracy and proper engagement. Manufacturing complies with ASME B18.6.3 specifications for binding head screws, guaranteeing interchangeability and performance reliability. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations regarding hazardous substances, making it suitable for global industrial applications with strict environmental requirements.