S-91263A512 6-32 x 1/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Alloy Steel Hex Drive Flat Head Screws

0309FA00540 Alloy Steel Hex Drive Flat Head Screws
0309FA00540 Alloy Steel Hex Drive Flat Head Screws

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Part No.
Part No. 0309FA00540
Equivalent to mcmaster :
91263A512

Basic Information

System of Measurement Inch

Head Parameters

Head Type Flat
Head Diameter 0.307"
Head Height 0.097"
Flat Head Profile Standard

Dimensions

Length 1/4"

Thread Parameters

Thread Type UNC
Thread Size 6-32
Thread Diameter 0.138"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 3A
Threading Fully Threaded

Tip & Drive Parameters

Drive Style Hex
Drive Size 5/64"
Countersink Angle 82°

Material & Strength

Material Zinc-Plated 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 holding power with 130,000 psi tensile strength, ensuring reliable fastening in demanding applications.
  • Superior corrosion resistance provided by the zinc-plated alloy steel material, extending service life in various environments.
  • High-precision thread fit with Class 3A tolerance for secure, vibration-resistant connections and reduced risk of loosening.
  • Efficient installation using a standard 5/64" hex drive, allowing for quick and easy assembly with common tools.
  • Optimal flush mounting with an 82° countersink angle and flat head design, creating a smooth, professional finish.
  • Maximum thread engagement due to full threading along the 1/4" length, enhancing grip and load distribution.
  • Compliance with stringent industry standards including ASTM F835, RoHS 3, and REACH, ensuring safety and regulatory adherence.

Professional Applications & Engineering Value

These 6-32 UNC flat head screws are engineered to address critical fastening challenges in industrial and mechanical assemblies. The zinc-plated alloy steel construction offers excellent durability and corrosion resistance, making them ideal for environments where moisture or chemicals are present. The coarse UNC thread and Class 3A thread fit provide superior grip and vibration resistance, reducing the risk of joint failure in machinery, electronics, and automotive components. With a Rockwell C39 hardness and fully threaded design, they ensure consistent performance under high-stress conditions, while the 82° countersink allows for seamless integration into surfaces, preventing snagging and improving aesthetics. These screws are a trusted solution for applications requiring robust, reliable, and compliant industrial fasteners.

Specification Summary & Compliance

This product features precise Class 3A thread fit and adheres to UNC coarse thread standards. It is manufactured in compliance with ASTM F835 specifications, ensuring consistent quality and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, confirming its safety for use in various industrial and consumer applications.

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