S-91255A209 8-36 x 1/2" 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
- Superior corrosion resistance with Black-Oxide coating on Alloy Steel, extending service life in demanding environments
- Exceptional tensile strength of 120,000 psi ensures reliable fastening under high-stress industrial applications
- Precision Class 3A thread fit guarantees tighter tolerances and vibration-resistant connections
- Fine UNF thread spacing provides enhanced grip and reduced risk of loosening in precision assemblies
- Fully threaded design offers maximum engagement and consistent clamping force along the entire length
- Rounded button head with hex drive allows for low-profile installation and secure tool engagement
- Compliance with major industry standards including ASME B18.3 and ASTM F835 ensures consistent quality and reliability
Professional Applications & Engineering Value
These 8-36 UNF Class 3A Black-Oxide Alloy Steel Rounded Head Screws are engineered for precision applications where reliability is non-negotiable. The fine thread spacing and Class 3A fit deliver superior resistance to vibrational loosening in machinery, electronics, and automotive assemblies. Made from high-strength alloy steel with a Rockwell C39 hardness, they withstand repetitive stress without compromising integrity. The Black-Oxide surface treatment provides an added layer of corrosion protection, making them ideal for environments exposed to moisture or chemicals. Their fully threaded right-hand design ensures maximum load distribution, while the low-profile rounded head and 3/32" hex drive facilitate easy installation in confined spaces, reducing assembly time and improving operational efficiency.
Specification Summary & Compliance
This screw features precision 8-36 UNF fine threads with Class 3A tolerance for exact fit and performance. It meets ASME B18.3 and ASTM F835 specifications, ensuring adherence to rigorous manufacturing standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for global industrial use.
