S-3638N137 M12 x 80 mm DIN 561B Set Screws

Set Screws

0663FA00025 Set Screws
0663FA00025 Set Screws

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

Part No.
Part No. 0663FA00025
Equivalent to mcmaster :
3638N137

Basic Information

System of Measurement Metric

Head Parameters

Head Type Hex
Head Width 16 mm
Head Height 9 mm

Dimensions

Length 80 mm

Thread Parameters

Thread Type Metric
Thread Size M12
Thread Pitch 1.75 mm
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 6g

Tip & Drive Parameters

Tip Type Extended
Tip Length 6 mm
Tip Length Tolerance 0 to 0.3mm
Tip Diameter 8.5 mm
Tip Diameter Tolerance -0.22mm 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

  • Exceptional tensile strength with Class 8.8 rating ensures reliable performance under high-stress industrial applications
  • Precision coarse threading (M12 x 1.75mm) enables faster installation and superior vibration resistance in demanding environments
  • External hex drive design provides maximum torque transmission and prevents tool slippage during tightening operations
  • Extended tip configuration with controlled tolerances ensures precise positioning and secure component alignment
  • Rockwell C20 hardness maintains structural integrity and thread form under repeated assembly cycles
  • Full regulatory compliance with RoHS 3 and REACH standards guarantees environmental safety and global market acceptance
  • DIN 561B certification validates manufacturing consistency and dimensional accuracy for quality-critical applications

Professional Applications & Engineering Value

This M12 hex set screw delivers critical engineering solutions where component security and positional accuracy are paramount. The Class 8.8 steel construction provides optimal strength-to-weight ratio for machinery assemblies, automotive components, and industrial equipment requiring reliable fastening under dynamic loads. The coarse thread pitch (1.75mm) significantly reduces cross-threading risks during high-volume assembly operations while maintaining vibration resistance in mobile equipment. The extended tip design with controlled diameter tolerances enables precise shaft positioning in pulley systems, gear assemblies, and coupling applications, eliminating the need for additional locating components. Manufactured to DIN 561B specifications, these metric set screws ensure dimensional consistency across international engineering projects and replacement part inventories.

Specification Summary & Compliance

This precision fastener features M12 coarse threading with Class 6g tolerance ensuring proper fit with standard metric nuts and threaded components. The 80mm length with extended tip (6mm ±0.3mm) maintains strict dimensional control per DIN 561B manufacturing standards. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility and chemical safety for global industrial supply chains.

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