S-91263A526 8-32 x 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Alloy Steel Hex Drive Flat Head Screws

0309FA00550 Alloy Steel Hex Drive Flat Head Screws
0309FA00550 Alloy Steel Hex Drive Flat Head Screws

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Part No.
Part No. 0309FA00550
Equivalent to mcmaster :
91263A526

Basic Information

System of Measurement Inch

Head Parameters

Head Type Flat
Head Diameter 0.359"
Head Height 0.112"
Flat Head Profile Standard

Dimensions

Length 3/4"

Thread Parameters

Thread Type UNC
Thread Size 8-32
Thread Diameter 0.164"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 3A
Threading Fully Threaded

Tip & Drive Parameters

Drive Style Hex
Drive Size 3/32"
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
In Stock
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Key Features & Benefits at a Glance

  • Exceptional tensile strength of 130,000 PSI for reliable performance in demanding applications
  • Superior corrosion resistance provided by zinc plating, extending service life in harsh environments
  • Precision Class 3A thread fit ensures secure fastening and vibration resistance
  • Full threading design delivers maximum grip and load distribution across the entire length
  • 82° countersink angle allows for flush mounting and clean aesthetic finish
  • Rockwell C39 hardness maintains thread integrity and prevents stripping during installation
  • Hex drive compatibility with 3/32" tools for efficient installation and removal

Professional Applications & Engineering Value

These 8-32 UNC flat head screws are engineered to solve critical fastening challenges in industrial assembly and machinery. The zinc-plated alloy steel construction provides excellent corrosion protection while maintaining the 130,000 PSI tensile strength required for structural applications. The coarse UNC thread profile ensures rapid installation and superior holding power in various materials, while the standard 82° countersink angle creates seamless flush mounting for safety and aesthetics. Ideal for automotive components, electrical enclosures, and heavy equipment where vibration resistance and long-term reliability are paramount. The fully threaded design maximizes surface contact for enhanced load distribution, making these industrial screws perfect for applications requiring consistent clamping force across the entire fastener length.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit precision and UNC coarse thread specifications. These flat head screws comply with ASTM F835 manufacturing standards and meet critical regulatory requirements including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) environmental regulations. The 3/4" length and 0.164" thread diameter maintain dimensional accuracy for consistent performance across industrial applications.

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