S-91223A437 M5 x 50 mm 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

316 Stainless Steel Ultra-Low-Profile Socket Head Screws

0031FA00085 316 Stainless Steel Ultra-Low-Profile Socket Head Screws
0031FA00085 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

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Part No.
Part No. 0031FA00085
Equivalent to mcmaster :
91223A437

Basic Information

System of Measurement Metric

Head Parameters

Head Type Socket
Head Diameter 8.5 mm
Head Diameter Tolerance -0.127mm to 0.127mm
Head Height 1.7 mm
Socket Head Profile Ultra-Low

Dimensions

Length 50 mm
Shoulder Diameter 5.2 mm
Shoulder Length 1.7 mm

Thread Parameters

Thread Type Metric
Thread Size M5
Thread Pitch 0.8 mm
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 6g
Threading Fully Threaded

Tip & Drive Parameters

Drive Style Hex
Drive Size 3 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 in harsh environments due to 316 Stainless Steel construction, ideal for marine, chemical, and outdoor applications.
  • High strength and durability with a tensile strength of 70,000 psi and Rockwell B70 hardness, ensuring reliable performance under load.
  • Space-saving design with an ultra-low profile socket head, allowing installation in tight or recessed spaces where clearance is limited.
  • Secure and efficient fastening enabled by the 3mm hex drive, providing excellent torque transfer and reducing the risk of tool slippage.
  • Precise thread fit with Class 6g tolerance, offering consistent engagement and reducing the likelihood of cross-threading in assembly.
  • Full thread coverage along the 50mm length for maximum grip and adjustability in various material thicknesses.
  • Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries and global markets.

Professional Applications & Engineering Value

This M5 socket head cap screw is engineered to address common industrial challenges such as corrosion and space constraints. Made from 316 Stainless Steel, it resists pitting and cracking in aggressive conditions, making it suitable for machinery, marine equipment, and chemical processing plants. The ultra-low profile head and 3mm hex drive allow for compact assemblies without compromising on torque application, reducing the need for custom modifications. With a coarse thread and Class 6g thread fit, it ensures quick installation and reliable holding power in dynamic environments, minimizing downtime and maintenance costs. Ideal for precision engineering and high-stress applications, this fastener delivers long-term value by enhancing assembly integrity and operational efficiency.

Specification Summary & Compliance

This screw features a metric M5 x 0.8mm coarse thread with Class 6g tolerance for precise fit, a head diameter of 8.5mm (±0.127mm tolerance), and a full 50mm length. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances. Manufactured to high standards, it meets typical industrial requirements for metric fasteners in terms of dimensional accuracy and material properties.

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