S-90265A335 M8 ISO 7379 Shoulder Screws

Shoulder Screws

0543FA00181 Shoulder Screws
0543FA00181 Shoulder Screws

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

Part No.
Part No. 0543FA00181
Equivalent to mcmaster :
90265A335

Basic Information

System of Measurement Metric

Head Parameters

Head Type Socket
Head Diameter 18 mm
Head Height 9 mm
Head Texture Knurled
Socket Head Profile Standard

Dimensions

Shoulder Diameter 12 mm
Shoulder Diameter Tolerance -0.072 to -0.01 mm
Shoulder Fit Standard
Shoulder Length 15 mm
Shoulder Length Tolerance 0 to 0.25 mm

Thread Parameters

Thread Type Metric
Thread Size M8
Thread Pitch 1.25 mm
Thread Spacing Coarse
Thread Length 16 mm
Thread Direction Right Hand
Thread Fit Class 5g6g

Tip & Drive Parameters

Drive Style Hex
Drive Size 6 mm

Material & Strength

Material 18-8 Stainless Steel
Hardness Rockwell B83
Tensile Strength 70000 psi
Minimum Shear Strength 45000 psi

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met ISO 7379
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
  • Enhanced load-bearing capacity from a high 70,000 psi tensile strength and 45,000 psi shear strength for reliable performance.
  • Precise component alignment enabled by the 12 mm shoulder diameter with tight tolerance control.
  • Secure and efficient assembly using the hex socket drive, allowing for high torque application without slippage.
  • Excellent thread engagement and durability with a Class 5g6g coarse pitch thread, resisting vibration loosening.
  • Improved grip during manual adjustment thanks to the knurled head texture.
  • Guaranteed material safety and environmental compliance meeting RoHS 3 and REACH regulations.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address critical alignment and high-stress challenges in industrial applications. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, extending service life in demanding conditions. The precision 12 mm shoulder diameter ensures accurate location and spacing of components such as gears, pulleys, and linkages, reducing wear and misalignment. The hex socket drive and coarse pitch metric thread facilitate quick, secure installation and high clamp force, making it ideal for machinery, automotive assemblies, and precision equipment where vibration resistance and structural integrity are paramount.

Specification Summary & Compliance

This shoulder screw features an M8x1.25 right-hand thread with a Class 5g6g thread fit, ensuring dimensional accuracy and interchangeability. The shoulder diameter tolerance is controlled between -0.072 to -0.01 mm, and the shoulder length tolerance is 0 to 0.25 mm. Manufactured to meet ISO 7379 specifications, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing safety and environmental standards.

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