S-91223A452 M8 x 20 mm 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

316 Stainless Steel Ultra-Low-Profile Socket Head Screws

0031FA00098 316 Stainless Steel Ultra-Low-Profile Socket Head Screws
0031FA00098 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

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

Part No.
Part No. 0031FA00098
Equivalent to mcmaster :
91223A452

Basic Information

System of Measurement Metric

Head Parameters

Head Type Socket
Head Diameter 13 mm
Head Diameter Tolerance -0.127mm to 0.127mm
Head Height 2.7 mm
Socket Head Profile Ultra-Low

Dimensions

Length 20 mm
Shoulder Diameter 8.5 mm
Shoulder Length 2.7 mm

Thread Parameters

Thread Type Metric
Thread Size M8
Thread Pitch 1.25 mm
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 6g
Threading Fully Threaded

Tip & Drive Parameters

Drive Style Hex
Drive Size 5 mm

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 extended service life.
  • High mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under heavy loads.
  • Precise thread engagement ensured by Class 6g thread fit, reducing the risk of cross-threading and ensuring secure fastening.
  • Space-saving design with an ultra-low socket head profile, perfect for applications with limited clearance.
  • Efficient installation and removal using a standard 5mm hex key, providing a secure grip and reducing tool slippage.
  • Full thread coverage along the 20mm length for maximum grip and uniform stress distribution in assembled components.
  • Compliance with environmental regulations, meeting RoHS 3 and REACH standards for safe and sustainable use.

Professional Applications & Engineering Value

This M8 x 1.25mm socket head cap screw is engineered to address critical challenges in industrial settings, such as vibration resistance and material degradation. Made from 316 stainless steel, it provides excellent resistance to corrosion from chemicals, moisture, and salt, making it suitable for marine, chemical processing, and food industry applications. The coarse thread design ensures quick assembly and reduces the risk of thread stripping in softer materials or high-vibration environments. With its ultra-low head profile and 5mm hex drive, it allows for compact designs and reliable torque application, minimizing the need for frequent maintenance and replacements. This screw delivers consistent performance in machinery, automotive assemblies, and structural frameworks where high-strength and durability are paramount.

Specification Summary & Compliance

This product features a Metric M8 x 1.25mm coarse thread with a Class 6g thread fit for precise dimensional accuracy. The head diameter tolerance is maintained between -0.127mm to 0.127mm, ensuring consistent quality. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial use.

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