S-91236A566 1/4"-20 x 6" 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 that protects against rust in demanding industrial environments
- High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
- Quick installation and removal with external hex drive design that provides secure tool engagement
- Excellent thread engagement with UNC coarse threading that resists loosening in various materials
- Precise Class 2A thread fit guarantees consistent performance and compatibility with standard nuts
- Durable steel construction with Rockwell B69 hardness for long service life in structural applications
- Regulatory compliance with RoHS 3 and REACH standards for environmentally responsible sourcing
Professional Applications & Engineering Value
This 1/4"-20 x 6" hex head screw delivers exceptional engineering value for industrial assembly and construction applications. The steel construction with zinc plating provides crucial corrosion protection in environments exposed to moisture and chemicals, while the UNC coarse threading offers superior resistance to vibration loosening compared to fine threads. The partially threaded design concentrates strength where needed most, making it ideal for securing structural components, machinery frames, and heavy equipment. With external hex drive compatibility, installation teams can achieve proper torque values efficiently using standard tools, reducing assembly time and ensuring consistent clamping force across multiple connection points in manufacturing and construction projects.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with 1/4"-20 UNC coarse threading and right-hand thread direction. Manufactured to ASME B18.2.1 specifications where identified as ASTM A307, it ensures dimensional accuracy and interchangeability. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental standards for industrial components. With a minimum thread length of 3/4" and overall length of 6", this screw maintains consistent performance across its specified dimensional parameters.
