S-91255A025 10-32 x 3/16" 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 Black-Oxide finish, ideal for harsh industrial environments
- Superior thread engagement with Class 3A fit and UNF fine threading for vibration-resistant assemblies
- High tensile strength of 120,000 psi ensures reliable performance under heavy loads
- Rockwell C39 hardness provides excellent wear resistance and extended service life
- Full threading design offers maximum grip length and uniform clamping force
- 1/8" hex drive enables easy installation with standard tools in confined spaces
- Rounded button head profile combines low-profile aesthetics with smooth surface contact
Professional Applications & Engineering Value
These 10-32 UNF Class 3A Black-Oxide Alloy Steel rounded head screws deliver critical performance advantages in precision engineering applications. The UNF fine thread configuration provides superior resistance to vibrational loosening in machinery, automotive, and aerospace assemblies, while the Class 3A thread fit ensures precise dimensional accuracy for high-tolerance applications. The Black-Oxide surface treatment on Alloy Steel substrate creates a durable barrier against corrosion without compromising the material's inherent strength. The combination of 120,000 psi tensile strength and Rockwell C39 hardness makes these fully threaded screws ideal for critical joints subjected to dynamic loading conditions, while the rounded button head design with 1/8" hex drive facilitates installation in space-constrained environments common in electronic enclosures and precision equipment.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit tolerance for precision applications, these screws conform to UNF (Unified National Fine) thread specifications with 10-32 thread size. Compliance with ASME B18.3 and ASTM F835 manufacturing standards ensures consistent quality and dimensional accuracy. The product meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, making them suitable for global industrial applications requiring stringent material restrictions.
