S-91223A453 M8 x 25 mm 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

316 Stainless Steel Ultra-Low-Profile Socket Head Screws

0031FA00099 316 Stainless Steel Ultra-Low-Profile Socket Head Screws
0031FA00099 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

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Part No.
Part No. 0031FA00099
Equivalent to mcmaster :
91223A453

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 25 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 including chemical and marine applications
  • Exceptional mechanical strength with 70,000 PSI tensile strength and Rockwell B70 hardness for reliable performance under high stress
  • Precise thread engagement with Class 6g tolerance ensuring consistent fit and vibration resistance in assembled components
  • Space-saving installation thanks to the ultra-low socket head profile, allowing use in confined spaces
  • Secure torque transmission via the 5mm hex drive, minimizing stripping and enabling high tightening forces
  • Full thread coverage along the 25mm length for maximum grip and load distribution across the entire fastener
  • Regulatory compliance with RoHS 3 and REACH, ensuring safe use in regulated industrial and consumer products

Professional Applications & Engineering Value

Engineered for demanding environments, these M8 socket head cap screws in 316 stainless steel provide outstanding resistance to corrosion, acids, and chlorides, making them perfect for chemical processing, marine equipment, and food machinery. The ultra-low head profile and 5mm hex drive allow for compact designs and secure installation in tight spaces, reducing assembly time and improving structural integrity. With a coarse M8 x 1.25mm thread and Class 6g fit, these screws ensure quick, reliable fastening with minimal risk of cross-threading, enhancing productivity in automated assembly lines. Their high tensile strength and full threading support heavy-duty applications, from machinery frames to precision instruments, delivering long-term reliability and reduced maintenance costs.

Specification Summary & Compliance

This socket head cap screw features an M8 x 1.25mm coarse metric thread with Class 6g tolerance for precise fit, a 5mm hex drive, and a 25mm fully threaded length. Manufacturing adheres to standard metric dimensions, with materials meeting RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for environmental safety.

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