S-91355A090 3/8"-16 x 1" 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 with black-oxide coating, extending service life in harsh industrial environments
- Superior tensile strength (120,000 psi) and Rockwell C39 hardness for reliable performance under heavy loads
- Precise Class 3A thread fit ensures tight, secure fastening with minimal risk of stripping or cross-threading
- Wide button head design with integrated flange provides increased bearing surface and eliminates need for separate washers
- 7/32" hex drive allows for high-torque installation with standard tools while resisting cam-out
- UNC coarse threading enables faster assembly and better performance in materials prone to vibration
- Full threading along the entire 1" length offers maximum adjustability and holding power
Professional Applications & Engineering Value
This black-oxide alloy steel rounded head hex screw delivers critical performance advantages for demanding industrial applications. The combination of 120,000 psi tensile strength and Rockwell C39 hardness provides exceptional resistance to shear forces and deformation, making it ideal for heavy machinery, structural assemblies, and equipment subjected to vibration. The UNC coarse thread design ensures rapid installation while maintaining grip strength in softer materials. The integrated flange distributes clamping force evenly, preventing surface damage and reducing point loading. With its black-oxide surface treatment, this fastener offers enhanced corrosion protection without compromising dimensional accuracy, solving common challenges in manufacturing, construction, and maintenance operations where reliability and durability are paramount.
Specification Summary & Compliance
This 3/8"-16 x 1" rounded head hex screw features Class 3A thread fit precision with UNC coarse thread spacing and right-hand threading. Manufactured to ASME B18.3 specifications (ASTM F835) with complete RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental responsibility and regulatory adherence for global industrial applications.
