S-91253A266 10-32 x 7/16" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Alloy Steel Hex Drive Flat Head Screws

0309FA00196 Alloy Steel Hex Drive Flat Head Screws
0309FA00196 Alloy Steel Hex Drive Flat Head Screws

Image may differ from product. See technical specification for details.

Part No.
Part No. 0309FA00196
Equivalent to mcmaster :
91253A266

Basic Information

System of Measurement Inch

Head Parameters

Head Type Flat
Head Diameter 0.411"
Head Height 0.127"
Flat Head Profile Standard

Dimensions

Length 7/16"

Thread Parameters

Thread Type UNF
Thread Size 10-32
Thread Diameter 0.19"
Thread Spacing Fine
Thread Direction Right Hand
Thread Fit Class 3A
Threading Fully Threaded

Tip & Drive Parameters

Drive Style Hex
Drive Size 1/8"
Countersink Angle 82°

Material & Strength

Material Black-Oxide Alloy Steel
Hardness Rockwell C39
Tensile Strength 130000 psi

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met ASTM F835
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Exceptional tensile strength of 130,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
  • Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant assemblies in machinery and equipment.
  • Black-oxide coating on alloy steel enhances corrosion resistance and durability, extending service life in demanding environments.
  • Fully threaded design with fine UNF spacing offers maximum grip and uniform load distribution, ideal for fine-adjustment applications.
  • 82° countersink angle and flat head allows for a flush, low-profile installation, minimizing protrusion and improving safety.
  • 1/8" hex drive enables easy installation and removal with standard tools, reducing assembly time and labor costs.
  • Compliance with ASTM F835, RoHS 3, and REACH ensures adherence to industry standards for safety and environmental responsibility.

Professional Applications & Engineering Value

Engineered for precision and endurance, these 10-32 UNF flat head screws are crafted from black-oxide alloy steel to combat corrosion and wear in harsh industrial settings. The Class 3A thread and fine thread spacing deliver exceptional clamping force and vibration resistance, critical for machinery, automotive, and electronic assemblies where loosening can lead to operational failures. The fully threaded design ensures consistent engagement across the entire length, while the 82° countersink angle facilitates seamless integration into tapered holes, providing a secure, flush fit that enhances both aesthetics and functionality. Ideal for applications requiring high tensile strength and reliable fastening, these screws address common challenges like material fatigue and environmental exposure, making them a trusted choice for engineers and OEMs.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNF fine threading. It meets ASTM F835 specifications for mechanical properties and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.

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