S-93585A522 M8 x 20 mm Thumb Screws

Thumb Screws

0771FA00030 Thumb Screws
0771FA00030 Thumb Screws

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

Part No.
Part No. 0771FA00030
Equivalent to mcmaster :
93585A522

Basic Information

System of Measurement Metric

Head Parameters

Head Type Thumb
Thumb Screw Head Shape Round
Round-Head Thumb Screw Profile High
Head Diameter 19 mm
Head Height 14.3 mm
Head Texture Knurled

Dimensions

Length 20 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

Material & Strength

Material 18-8 Stainless Steel
Hardness Rockwell B83
Tensile Strength 80000 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

  • Maximum hand-tightening capability with high-profile knurled head design for superior grip in tool-free applications
  • Exceptional corrosion resistance provided by 18-8 stainless steel construction for long-lasting performance in harsh environments
  • Reliable mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness to withstand demanding industrial loads
  • Precision thread engagement through Class 6g metric coarse threads ensuring consistent fastening performance
  • Full-length threading enables complete engagement along the entire 20mm shaft for maximum holding power
  • Compliance with environmental regulations including RoHS 3 and REACH for global market acceptance
  • Right-hand thread design provides intuitive installation following standard fastening conventions

Professional Applications & Engineering Value

This M8 thumb screw delivers exceptional value in applications requiring frequent adjustments or tool-free operation. The high-profile knurled head with 19mm diameter and 14.3mm height provides substantial surface area for secure hand tightening, eliminating the need for tools in maintenance-heavy environments. Manufactured from 18-8 stainless steel, these thumb screws resist corrosion in industrial settings while maintaining structural integrity. The metric coarse thread with 1.25mm pitch and Class 6g tolerance ensures quick installation and reliable performance in vibration-prone applications. Ideal for electronic enclosures, machinery guards, and access panels, these fully threaded thumb screws offer engineers a compliant, durable fastening solution that withstands repeated use without degradation.

Specification Summary & Compliance

This thumb screw features M8 x 1.25mm coarse metric threads with Class 6g thread fit precision, ensuring consistent engagement across mating components. The fully threaded 20mm length provides complete fastening capability along the entire shaft. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making these screws suitable for global industrial applications requiring strict material compliance. The right-hand thread direction follows standard industrial conventions for intuitive installation and removal.

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