S-91255A643 3/8"-24 x 3/4" ASTM F835 Steel Button Head Hex-Drive Screws
Steel Button Head Hex-Drive Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional corrosion resistance with Black-Oxide finish, ideal for harsh industrial environments.
- Superior load-bearing capability from 120,000 psi tensile strength, ensuring reliable performance under high stress.
- Precise, secure fastening with Class 3A fine UNF threading, minimizing the risk of loosening in critical assemblies.
- Easy installation and removal using a standard 7/32" hex drive, reducing assembly time and tool wear.
- Enhanced durability from Rockwell C39 hardness, providing excellent resistance to wear and deformation.
- Full thread engagement along the 3/4" length, offering maximum grip and uniform stress distribution.
- Compliance with major industry standards including ASME B18.3 and ASTM F835, ensuring consistent quality and safety.
Professional Applications & Engineering Value
This Black-Oxide Alloy Steel Rounded Head Hex Screw is engineered to address common industrial challenges such as vibration-induced loosening and environmental degradation. The Class 3A UNF fine thread provides tighter tolerances, essential for precision equipment and machinery where alignment and stability are critical. The button head design offers a low-profile, smooth finish, reducing snagging risks in automated systems. With a high tensile strength of 120,000 psi and robust Rockwell C39 hardness, it withstands heavy loads and repetitive stress in applications like automotive assemblies, aerospace components, and heavy machinery. The Black-Oxide coating adds a protective layer against rust and corrosion, extending service life in demanding conditions without compromising dimensional integrity.
Specification Summary & Compliance
This screw features 3/8"-24 UNF fine threads with Class 3A fit for high precision, a fully threaded 3/4" length, and a rounded (button) head with 7/32" hex drive. It is manufactured in compliance with ASME B18.3 and ASTM F835 standards, ensuring consistent performance and interchangeability. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for hazardous substances.
