S-91670A316 10-32 x 1" ASTM A574 Left-Hand Threaded Alloy Steel Socket Head Screws
Left-Hand Threaded Alloy Steel Socket Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with black-oxide coating for extended service life in harsh industrial environments
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress mechanical applications
- Precise Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies
- Left-hand thread design offers specialized functionality for counter-rotational systems and safety-critical applications
- Rockwell C37 hardness maintains structural integrity and prevents deformation during installation and operation
- Hex socket drive enables high-torque installation in confined spaces with standard 5/32" tools
- Full thread coverage along the 1" length ensures maximum grip and load distribution
Professional Applications & Engineering Value
These left-hand thread socket head cap screws provide critical engineering solutions where standard right-hand threads would loosen under rotational forces. The black-oxide alloy steel construction offers superior corrosion protection while maintaining the 170,000 psi tensile strength required for high-stress mechanical systems. The 10-32 UNF fine thread spacing with Class 3A fit ensures precise engagement in aerospace, automotive, and industrial machinery applications where vibration resistance is paramount. The combination of Rockwell C37 hardness and hex drive design allows for reliable installation in confined spaces without compromising fastener integrity, making them ideal for maintenance-critical assemblies and safety-sensitive equipment.
Specification Summary & Compliance
Manufactured to ASTM A574 specifications with Class 3A thread fit precision and UNF thread standard compliance. These socket head cap screws feature 10-32 left-hand fine threads with 0.19" thread diameter and 1" fully threaded length. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
