S-91251A045 3/4"-16 x 2 1/4" ASTM A574 Alloy Steel Socket Head Screws
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
- Exceptional tensile strength of 170,000 psi ensures reliable performance under extreme loads and vibrations in demanding industrial applications.
- Superior corrosion resistance provided by the black-oxide finish, extending the screw's service life in various environmental conditions.
- Precise Class 3A thread fit guarantees secure, tight fastening with minimal risk of loosening, ideal for high-precision assemblies.
- High torque capability enabled by the 5/8" hex drive and robust alloy steel construction, allowing for efficient installation and removal.
- Fine thread spacing (UNRF) offers improved adjustment and holding power in materials where coarse threads may not be suitable.
- Full thread design along the 2 1/4" length provides consistent clamping force and versatility across the entire fastener.
- Compliance with ASTM A574, RoHS 3, and REACH ensures material quality, environmental safety, and suitability for regulated industries.
Professional Applications & Engineering Value
This Socket Head Cap Screw is engineered from Black-Oxide Alloy Steel to address critical challenges in heavy machinery, automotive, and aerospace sectors. Its Rockwell C37 hardness and 170,000 psi tensile strength prevent failure under high stress, while the 3/4"-16 UNRF fine threads and Class 3A fit ensure leak-proof and vibration-resistant connections in precision equipment. The 5/8" hex drive allows for high-torque application without stripping, making it ideal for confined spaces. Fully threaded for uniform load distribution, it reduces the risk of joint fatigue, enhancing safety and durability in industrial applications where reliability is non-negotiable.
Specification Summary & Compliance
This screw features a 3/4"-16 UNRF thread with Class 3A tolerance for precise fit, fine thread spacing, and right-hand direction. Manufactured to ASTM A574 specifications, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring adherence to environmental and safety standards for industrial use.
