S-91251A949 1 1/4"-7 x 10" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under extreme loads and prevents fastener failure in demanding applications
• Corrosion-resistant black-oxide coating provides enhanced durability and protection against rust in harsh industrial environments
• Precision Class 2A thread fit with UNRC coarse threads enables faster installation and superior vibration resistance
• High hardness rating (Rockwell C37) maintains thread integrity and prevents stripping during repeated assembly and disassembly
• Large 7/8" hex drive socket allows for high torque application and secure fastening in confined spaces
• Partially threaded design provides optimal clamping force distribution while reducing weight and material costs
• Comprehensive compliance with ASTM A574, RoHS, and REACH ensures material quality and environmental responsibility

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw delivers critical engineering solutions for heavy machinery, construction equipment, and industrial assembly applications where high tensile strength and corrosion resistance are paramount. The UNRC coarse thread configuration combined with Class 2A thread fit ensures rapid installation and maintains clamping force under constant vibration, addressing common loosening issues in dynamic environments. The partially threaded design concentrates thread engagement where needed most, while the black-oxide surface treatment provides essential protection against moisture and chemical exposure. Engineered to ASTM A574 specifications, this 10-inch fastener offers reliable performance in structural connections, equipment manufacturing, and maintenance applications requiring superior durability and long-term reliability.

Specification Summary & Compliance

This socket head cap screw features precision Class 2A thread fit with 1 1/4"-7 UNRC coarse threads and meets ASTM A574 manufacturing specifications. The fastener maintains dimensional accuracy throughout its 10-inch length with minimum thread length of 3 1/8 inches. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring material safety and regulatory adherence for industrial applications worldwide.