S-91306A379 1/4"-20 x 3/4" ASTM F835 Steel Button Head Hex-Drive Screws
Steel Button Head Hex-Drive 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 corrosion resistance with zinc-plated alloy steel construction, ideal for harsh industrial environments
- Superior thread engagement and vibration resistance through UNC coarse threading with Class 3A fit for reliable fastening
- High-strength performance under load with 120,000 psi tensile strength and Rockwell C39 hardness
- Full-length threading ensures maximum grip and holding power across the entire screw length
- Easy installation and removal with 5/32" hex drive and rounded button head design
- Compliance with major industrial standards including ASME B18.3 and ASTM F835 for guaranteed quality
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance
Professional Applications & Engineering Value
This zinc-plated alloy steel rounded head hex screw delivers critical performance advantages in demanding industrial applications. The combination of UNC coarse threading and Class 3A thread fit provides superior resistance to vibration loosening, making it ideal for machinery, equipment assembly, and structural frameworks where reliability is paramount. The fully threaded design ensures maximum contact surface area, distributing stress evenly and preventing joint failure. With 120,000 psi tensile strength and Rockwell C39 hardness, this fastener maintains integrity under heavy loads and repeated use. The corrosion-resistant zinc plating extends service life in challenging environments, while the rounded button head with 5/32" hex drive offers both aesthetic appeal and practical installation benefits.
Specification Summary & Compliance
This fastener features precision 1/4"-20 UNC coarse threading with Class 3A thread fit for exacting dimensional accuracy. Manufacturing complies with ASME B18.3 and ASTM F835 specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest industry standards for safe and sustainable manufacturing practices.
