S-91263A608 1/2"-13 x 1 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat Head 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 zinc plating that protects against rust in demanding industrial environments
- Exceptional tensile strength of 130,000 psi ensures reliable performance under heavy loads and vibration
- Precise Class 3A thread fit provides secure fastening with minimal play in critical applications
- 82° countersink angle allows for flush mounting in standard countersunk holes
- Full threading along the entire 1 3/4" length enables maximum grip and adjustment flexibility
- Rockwell C39 hardness maintains structural integrity and prevents stripping during installation
- 5/16" hex drive facilitates quick installation with standard tools while resisting cam-out
Professional Applications & Engineering Value
These zinc-plated alloy steel flat head screws deliver critical performance advantages in industrial fastening applications where vibration resistance and corrosion protection are paramount. The combination of Class 3A UNC coarse threads and 130,000 psi tensile strength addresses common failure points in heavy machinery, structural frameworks, and equipment assembly. The 82° standard countersink profile ensures flush mounting in predrilled holes, eliminating protrusions that could interfere with moving components. Engineered with fully threaded shanks, these flat head machine screws provide maximum engagement depth for securing thick materials and structural members, making them ideal for construction, manufacturing, and industrial maintenance applications where reliability cannot be compromised.
Specification Summary & Compliance
This 1/2"-13 UNC flat head screw features precise Class 3A thread fit tolerances and coarse thread spacing for optimal engagement. Manufactured to ASTM F835 specifications for consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use in regulated industries. The zinc-plated alloy steel construction meets industrial requirements for durability and corrosion resistance.
