S-90299A180 8-32 x 3/4" 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
- Precision thread engagement with Class 3A fit for reliable, vibration-resistant assemblies in demanding applications.
- Superior strength and durability from alloy steel construction, providing 180,000 psi tensile strength and Rockwell C39 hardness for heavy-duty use.
- Surface protection and corrosion resistance with black-oxide finish, extending service life in harsh industrial environments.
- Non-marring brass tip prevents damage to sensitive surfaces, ideal for fixtures and finished components.
- Secure, high-torque installation enabled by the hex socket drive and standard socket head profile, reducing tool slippage.
- Broad industrial compliance meeting ASME B18.3, RoHS 3, and REACH standards for quality and environmental safety.
- Coarse UNC threading ensures faster assembly and reduced cross-threading risk in coarse adjustment applications.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered for precision machinery, automation systems, and assembly jigs where surface integrity is critical. The non-marring brass tip eliminates scratching on anodized aluminum or polished surfaces, while the 8-32 UNC coarse thread and Class 3A fit provide exceptional clamp load retention under dynamic loads. With a 180,000 psi tensile strength and corrosion-resistant finish, it solves common failure points in high-vibration environments, ensuring long-term reliability in industrial fastening applications without compromising component aesthetics.
Specification Summary & Compliance
This screw features precision 8-32 UNC Class 3A threads with coarse spacing and a right-hand thread direction, manufactured to ASME B18.3 specifications under ASTM A574 material standards. The dimensional accuracy includes a 0.27" head diameter, 3/4" length, and 9/64" hex drive. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for global industrial use.
