S-91251A452 12-24 x 3/8" ASTM A574 Alloy Steel Socket Head Screws

Alloy Steel Socket Head Screws

0009FA00981 Alloy Steel Socket Head Screws
0009FA00981 Alloy Steel Socket Head Screws

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Part No.
Part No. 0009FA00981
Equivalent to mcmaster :
91251A452

Basic Information

System of Measurement Inch

Head Parameters

Head Type Socket
Head Diameter 0.324"
Head Height 0.216"
Socket Head Profile Standard

Dimensions

Length 3/8"

Thread Parameters

Thread Type UNC
Thread Size 12-24
Thread Diameter 0.216"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 3A
Threading Fully Threaded

Tip & Drive Parameters

Drive Style Hex
Drive Size 5/32"

Material & Strength

Material Black-Oxide Alloy Steel
Hardness Rockwell C37
Tensile Strength 170000 psi

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met ASTM A574
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 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
  • Superior corrosion resistance from the black-oxide finish extends service life in harsh environments, minimizing maintenance and replacement costs.
  • Precise Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity and reducing loosening over time.
  • High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use and installation.
  • Standard hex drive design allows for easy installation with common tools, speeding up assembly processes and reducing labor time.
  • Full threading along the 3/8" length ensures maximum grip and adjustability in various material thicknesses, providing versatile application use.
  • Compliance with environmental regulations (RoHS 3 and REACH) guarantees safe usage in regulated industries, supporting corporate sustainability goals.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this Black-Oxide Alloy Steel Socket Head Cap Screw delivers robust performance where high tensile strength and corrosion resistance are critical. The 12-24 UNC coarse threads and Class 3A fit ensure tight, reliable fastening in machinery, automotive assemblies, and heavy equipment, reducing vibration-induced failures. Its 5/32" hex drive facilitates quick installation in confined spaces, while the fully threaded design accommodates varying material depths. Ideal for applications requiring superior durability and compliance with strict standards, this screw minimizes downtime and enhances long-term operational safety in corrosive or high-load environments.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including 12-24 UNC coarse threads with a Class 3A thread fit for high accuracy. It meets ASTM A574 specifications for alloy steel socket head cap screws, ensuring consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmentally responsible manufacturing and use in global markets.

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