S-90299A544 1/4"-20 x 1 1/4" ASME B18.3, ASTM A574 Brass-Tip Alloy Steel Socket Head Screws
Brass-Tip 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
- Non-marring brass tip prevents surface damage to sensitive components during installation and use
- Exceptional 180,000 psi tensile strength provides reliable performance in high-stress industrial applications
- Black-oxide finish on alloy steel offers superior corrosion resistance and durability
- Precision Class 3A thread fit ensures secure, vibration-resistant fastening in demanding environments
- Standard UNC coarse threading enables quick installation and removal with standard tools
- 3/16" hex drive compatibility allows for easy torque application in confined spaces
- Full threading along the 1-1/4" length provides maximum grip and adjustment flexibility
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw delivers exceptional engineering value through its specialized design for precision applications. The non-marring brass tip addresses critical surface protection requirements in assembly operations involving delicate materials, electronics, and finished surfaces where scratches must be avoided. The Rockwell C39 hardness rating combined with 180,000 psi tensile strength ensures reliable performance in machinery, automotive, and aerospace applications subjected to vibration and heavy loads. The UNC coarse thread pattern with Class 3A fit provides superior engagement in both metallic and high-strength plastic components, while the 3/16" hex drive facilitates installation in space-constrained environments common in industrial equipment maintenance and manufacturing.
Specification Summary & Compliance
This socket head cap screw features precision 1/4"-20 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy. Manufactured to ASME B18.3 specifications using ASTM A574 alloy steel, the fastener ensures consistent performance and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications with strict material restrictions.
