S-91236A857 3/4"-10 x 5 1/2" 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 corrosion resistance with zinc plating, extending service life in demanding industrial environments.
- High-strength steel construction with a tensile strength of 60,000 PSI, ensuring reliable performance under heavy loads.
- Excellent hardness (Rockwell B69) for enhanced durability and resistance to wear and deformation.
- Coarse UNC threads provide faster assembly and better performance in softer materials or where debris is present.
- External hex drive and hex head design allows for high-torque installation with standard tools, improving installation efficiency.
- Class 2A thread fit ensures consistent, reliable engagement and ease of assembly without compromising strength.
- Partially threaded shank offers unthreaded grip length for precise clamping in structural and machinery applications.
Professional Applications & Engineering Value
This 3/4"-10 UNC hex head screw is engineered to solve critical fastening challenges in heavy machinery, structural steel connections, and industrial equipment assembly. The zinc-plated steel construction provides a robust barrier against rust and corrosion, essential for outdoor or high-moisture environments. Its coarse thread design ensures quick, secure fastening even in applications where vibration or material expansion is a concern. The partially threaded configuration allows the unthreaded portion to act as a precise dowel, preventing joint slippage and distributing shear loads effectively. With a 60,000 PSI tensile strength and Rockwell B69 hardness, it delivers reliable performance in high-stress applications, reducing the risk of fastener failure and maintenance downtime.
Specification Summary & Compliance
This screw features a 3/4"-10 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy. It is manufactured in compliance with ASME B18.2.1 specifications and meets material standards per ASTM A307. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for global industrial use.
