S-91286A293 7/16"-20 x 1 1/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 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
- Exceptional tensile strength of 150,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the zinc-flake coating extends service life in harsh environments, minimizing maintenance and replacement costs.
- High hardness (Rockwell C33) provides excellent wear resistance, maintaining thread integrity and drive engagement through repeated use.
- Precise UNF fine threading with Class 2A fit offers secure, vibration-resistant connections, enhancing assembly stability in machinery and equipment.
- Fully threaded design allows for maximum grip length and uniform load distribution, ideal for heavy-duty fastening requirements.
- Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interchangeability, simplifying procurement and inventory management.
- RoHS 3 and REACH compliance ensures environmental and safety standards are met, supporting sustainable and regulated manufacturing processes.
Professional Applications & Engineering Value
Engineered for demanding industrial environments, this Grade 8 hex head screw addresses critical challenges in heavy machinery, construction, and automotive assemblies. The steel material combined with UNF fine threads and Class 2A thread fit ensures tight, secure fastening that resists loosening under vibration and dynamic loads. The zinc-flake coating provides robust protection against corrosion, making it suitable for outdoor or chemically exposed settings. With full threading and an external hex drive, it facilitates easy installation and high clamp force, reducing assembly time and improving operational reliability in high-strength applications.
Specification Summary & Compliance
This fastener adheres to inch measurement standards with a thread size of 7/16"-20 and Class 2A thread fit for precise dimensional accuracy. It meets ASME B18.2.1 and SAE J429 specifications, ensuring consistent manufacturing quality. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and health safety in industrial use.
