S-91236A654 3/8"-16 x 9" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws
Low-Strength Steel Hex 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 tensile strength (60,000 psi) ensures reliable performance under high-stress industrial conditions.
- Zinc plating provides excellent corrosion resistance, extending service life in harsh environments.
- Coarse UNC threading with Class 2A fit allows for quick assembly and secure fastening in a wide range of materials.
- Partially threaded design offers optimal clamping force and vibration resistance in structural applications.
- External hex drive and hex head enable easy installation with standard tools, reducing assembly time.
- High hardness (Rockwell B69) minimizes wear and deformation during tightening and use.
- Compliance with ASME B18.2.1, RoHS 3, and REACH ensures quality, safety, and environmental standards are met.
Professional Applications & Engineering Value
This 3/8"-16 UNC hex head screw is engineered for demanding industrial applications where reliability and durability are critical. The steel construction combined with zinc plating offers robust corrosion protection, making it ideal for outdoor machinery, construction frameworks, and assembly lines exposed to moisture. The coarse thread spacing and Class 2A thread fit ensure easy engagement and strong holding power in wood, metal, and composite materials, reducing the risk of cross-threading. Its partially threaded design concentrates clamping force where needed, preventing joint loosening under vibration—common in automotive and heavy equipment sectors. By meeting ASME B18.2.1 specifications, it guarantees dimensional consistency and performance, streamlining procurement for engineers and maintenance teams.
Specification Summary & Compliance
This screw features a 3/8"-16 UNC thread with Class 2A dimensional accuracy for precise fit, a coarse thread spacing, and a minimum thread length of 1 1/4". It is manufactured in accordance with ASME B18.2.1 and ASTM A307 standards, ensuring consistent quality and mechanical properties. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms it is free of hazardous substances, supporting sustainable and safe usage in global markets.
