S-91223A348 1/2"-13 x 3" 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

316 Stainless Steel Ultra-Low-Profile Socket Head Screws

0031FA00060 316 Stainless Steel Ultra-Low-Profile Socket Head Screws
0031FA00060 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

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

Part No.
Part No. 0031FA00060
Equivalent to mcmaster :
91223A348

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 3"
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 industrial and marine environments
  • High-strength performance with 70,000 psi tensile strength and Rockwell B70 hardness for reliable, heavy-duty fastening
  • Precise, secure fit ensured by Class 2A thread tolerance, reducing the risk of cross-threading and assembly errors
  • Space-saving design with an ultra-low profile socket head, allowing installation in tight or recessed areas
  • Easy installation and removal using a standard 1/4" hex key drive, minimizing tool slippage and head stripping
  • Versatile coarse UNC threading (1/2"-13) provides quick assembly and strong holding power in a wide range of materials
  • Full regulatory compliance with RoHS 3 and REACH, ensuring safety and environmental standards are met for global supply chains

Professional Applications & Engineering Value

Engineered for demanding environments, these 316 stainless steel socket head cap screws deliver exceptional durability where corrosion resistance is critical. The ultra-low profile head and 1/4" hex drive enable secure fastening in confined spaces, common in machinery, automotive, and structural assemblies. With a coarse 1/2"-13 UNC thread and Class 2A fit, these screws offer rapid installation and reduced galling, while the 70,000 psi tensile strength ensures long-term reliability under vibration and load. Ideal for OEM and MRO applications, they meet rigorous industry standards without compromising on performance or compliance.

Specification Summary & Compliance

This socket head cap screw features a 1/2"-13 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy. Manufacturing adheres to standard inch system 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) regulations, supporting use in regulated industrial and international markets.

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