S-91223A238 1/2"-13 x 2" 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

316 Stainless Steel Ultra-Low-Profile Socket Head Screws

0031FA00025 316 Stainless Steel Ultra-Low-Profile Socket Head Screws
0031FA00025 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

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

Part No.
Part No. 0031FA00025
Equivalent to mcmaster :
91223A238

Basic Information

System of Measurement Inch

Head Parameters

Head Type Socket
Head Diameter 1"
Head Diameter Tolerance -0.005" to 0.005"
Head Height 11/64"
Socket Head Profile Ultra-Low

Dimensions

Length 2"
Shoulder Diameter 9/16"
Shoulder Length 11/64"

Thread Parameters

Thread Type UNC
Thread Size 1/2"-13
Thread Diameter 0.5"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 2A
Threading Fully Threaded

Tip & Drive Parameters

Drive Style Hex
Drive Size 1/4"

Material & Strength

Material 316 Stainless Steel
Hardness Rockwell B70
Tensile Strength 70000 psi

Temperature & Environment

REACH Compliant
RoHS Compliant
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and chemical exposure
  • Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
  • Optimized torque transmission through the 1/4" hex drive and ultra-low socket head profile, reducing tool slippage
  • Precise thread engagement with Class 2A fit and UNC coarse threads, ensuring consistent assembly and vibration resistance
  • Full-threaded design providing maximum grip and uniform stress distribution along the entire 2" length
  • Strict dimensional control with head diameter tolerance of ±0.005", guaranteeing interchangeability and fit
  • Environmental compliance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This 316 stainless steel socket head cap screw addresses critical challenges in industrial assembly where corrosion resistance, high tensile strength, and precise torque application are paramount. The ultra-low socket head profile combined with a 1/4" hex drive allows for efficient installation in confined spaces while minimizing the risk of cam-out. Its UNC coarse threads and Class 2A thread fit provide rapid assembly and reliable performance in high-vibration environments such as heavy machinery, marine equipment, and chemical processing systems. The fully threaded 2" length ensures uniform clamping force, making it suitable for structural applications requiring consistent load distribution. Engineered for durability, this fastener maintains integrity under stress while complying with stringent environmental regulations.

Specification Summary & Compliance

This socket head cap screw features precision 1/2"-13 UNC coarse threads with Class 2A tolerance for consistent fit and assembly. Manufacturing adheres to dimensional specifications including head diameter tolerance of -0.005" to 0.005". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring suitability for use in regulated industries and international markets.

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