S-91355A078 10-32 x 5/8" ASME B18.3, ASTM F835 Steel Flanged Button Head Hex-Drive Screws
Steel Flanged 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 from the Black-Oxide finish, ideal for harsh industrial environments.
- Superior tensile strength (120,000 psi) and hardness (Rockwell C39) for reliable performance under high stress.
- Precise Class 3A thread fit ensures secure, vibration-resistant fastening in critical assemblies.
- Flanged design with a wide rounded button head provides increased bearing surface and a finished appearance without a separate washer.
- Fully threaded body offers maximum grip and holding power along the entire 5/8" length.
- 1/8" Hex drive allows for high-torque installation with common tools, preventing stripping.
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees material quality and environmental safety for global supply chains.
Professional Applications & Engineering Value
This 10-32 UNF Class 3A screw is engineered for demanding applications where precision and durability are non-negotiable. The Black-Oxide Alloy Steel construction provides a robust barrier against corrosion, significantly extending service life in machinery, automotive, and electronics assemblies exposed to moisture or chemicals. The fine thread spacing and Class 3A fit deliver superior resistance to loosening under vibration, a common failure point in dynamic systems. The integral flange distributes clamping force effectively, protecting sensitive materials from damage. This combination of a fully threaded shank and a rounded button head makes it an ideal precision fastener for applications requiring a flush finish and maximum thread engagement.
Specification Summary & Compliance
This screw adheres to the dimensional and mechanical requirements of ASME B18.3 and features a Class 3A thread fit for high-precision applications. The UNF fine thread with a size of 10-32 and a right-hand direction is manufactured to exacting tolerances. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring the absence of hazardous substances for safe use in regulated industries.
