S-3638N113 M6 x 20 mm DIN 561B Set Screws

Set Screws

0663FA00003 Set Screws
0663FA00003 Set Screws

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

Part No.
Part No. 0663FA00003
Equivalent to mcmaster :
3638N113

Basic Information

System of Measurement Metric

Head Parameters

Head Type Hex
Head Width 8 mm
Head Height 5 mm

Dimensions

Length 20 mm

Thread Parameters

Thread Type Metric
Thread Size M6
Thread Pitch 1 mm
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 6g

Tip & Drive Parameters

Tip Type Extended
Tip Length 3 mm
Tip Length Tolerance 0 to 0.25mm
Tip Diameter 4 mm
Tip Diameter Tolerance -0.18mm to 0
Drive Style External Hex

Material & Strength

Material Steel
Hardness Rockwell C20
Fastener Strength Grade/Class Class 8.8

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met DIN 561B
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Superior clamping force with Class 8.8 strength grade for reliable performance in high-stress applications
  • Precise thread engagement with Class 6g fit and M6x1mm coarse thread ensuring consistent assembly and vibration resistance
  • Extended tip design provides deeper penetration and improved component retention compared to standard set screws
  • External hex drive compatibility allows for standard wrenching tools and high torque application without stripping
  • Enhanced durability through Rockwell C20 hardness treatment for long service life in demanding environments
  • Regulatory compliance with RoHS 3 and REACH standards ensures environmental safety and global market acceptance
  • Standardized dimensions per DIN 561B specification guarantee interchangeability and engineering consistency

Professional Applications & Engineering Value

This M6 metric set screw delivers exceptional engineering value through its Class 8.8 steel construction and extended tip design, specifically engineered to address common industrial fastening challenges. The coarse thread pitch combined with Class 6g thread fit provides superior resistance to vibration-induced loosening in machinery, automotive components, and production equipment. The external hex drive enables high-torque installation without cam-out issues, while the extended tip creates deeper engagement points for securing pulleys, gears, and collars on shafts. Manufactured to DIN 561B standards, these steel fasteners maintain dimensional consistency across production runs, reducing assembly time and ensuring reliable performance in industrial applications where precision and durability are critical.

Specification Summary & Compliance

This set screw features M6x1mm metric coarse threads with Class 6g thread fit tolerance, 20mm length, and extended tip design with 3mm tip length (±0.25mm tolerance). Manufactured from Class 8.8 steel with Rockwell C20 hardness, it complies with DIN 561B specification for dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental and safety regulations for industrial components.

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