S-94095A139 M8 x 8 mm ASME B18.3.6M, ASTM F912 Set Screws

Set Screws

0647FA00018 Set Screws
0647FA00018 Set Screws

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

Part No.
Part No. 0647FA00018
Equivalent to mcmaster :
94095A139

Basic Information

System of Measurement Metric

Head Parameters

Head Type Headless

Dimensions

Length 8 mm

Thread Parameters

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

Tip & Drive Parameters

Tip Type Soft
Tip Length 2.4 mm
Tip Diameter 4.8 mm
Tip Material Nylon 6/6 Plastic
Tip Color Green
Tip Temperature Range -50° to 250° F
Drive Style Hex
Drive Size 4 mm

Material & Strength

Material Black-Oxide Alloy Steel
Hardness Rockwell C28

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met ASME B18.3.6M, ASTM F912
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Secure anti-loosening performance with the green nylon 6/6 plastic tip that maintains grip under vibration and prevents surface damage to components
  • Enhanced corrosion resistance from the black-oxide finish on alloy steel, extending service life in demanding industrial environments
  • Precise torque application and reliable fastening enabled by the 4 mm hex drive and Class 5g6g thread fit, ensuring consistent clamping force
  • Broad temperature adaptability with the nylon tip rated from -50° to 250° F, suitable for applications with thermal fluctuations
  • Space-saving headless design that allows for flush mounting in tight assemblies without protruding hardware
  • Compliance with international standards including ASME B18.3.6M, RoHS 3, and REACH, ensuring quality and environmental safety for global supply chains
  • Durable material construction with Rockwell C28 hardness, providing high strength and wear resistance for repeated use

Professional Applications & Engineering Value

This M8 x 1.25mm coarse thread set screw is engineered to address common industrial challenges such as component slippage, vibration-induced loosening, and corrosion in harsh conditions. The black-oxide alloy steel body offers superior protection against rust, while the green nylon 6/6 plastic tip acts as a resilient locking element that distributes pressure evenly, minimizing marring on shafts, collars, or gears. Its headless hex drive design allows for easy installation in confined spaces using standard 4 mm tools, making it ideal for machinery, automotive, and electronics assemblies where reliability and compactness are critical. The metric thread and right-hand direction ensure compatibility with global equipment designs, reducing installation errors and maintenance downtime.

Specification Summary & Compliance

The screw features an M8 thread size with a 1.25 mm coarse pitch and Class 5g6g thread fit per ISO standards, guaranteeing dimensional accuracy and interchangeability. It is manufactured in compliance with ASME B18.3.6M specifications and adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industries.

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