S-95893A249 Length 18 mm Tapping Screws

Tapping Screws

0508FA00138 Tapping Screws
0508FA00138 Tapping Screws

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

Part No.
Part No. 0508FA00138
Equivalent to mcmaster :
95893A249

Basic Information

Tapping Screw Type TRS
System of Measurement Metric

Head Parameters

Head Type Flat
Head Diameter 9.3 mm
Head Height 2.9 mm
Flat Head Profile Standard

Dimensions

Length 18 mm
Shank Cross Section Round

Thread Parameters

Screw Size M5
Approximate Thread Pitch 2.24 mm
Thread Direction Right Hand
Threading Fully Threaded

Tip & Drive Parameters

Tip Type Blunt
Drive Style Torx
Drive Size T20
Drill Bit Size No. 21
Drill Bit Diameter 0.159"
Countersink Angle 90°
Tapping Method Thread Forming

Material & Strength

Material 18-8 Stainless Steel

Temperature & Environment

For Use In Plastic
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

  • Superior torque transmission with T20 Torx drive design, reducing cam-out and tool wear for reliable installation
  • Excellent corrosion resistance from 18-8 stainless steel construction, ensuring long-term durability in harsh environments
  • Efficient thread forming with TRS design for strong, vibration-resistant assemblies in plastic materials without pre-tapping
  • Secure flush mounting with standard 90° flat head profile, providing a clean finish and preventing surface protrusion
  • Full threading with 2.24mm pitch for maximum grip length and uniform stress distribution in plastic applications
  • Precise compatibility with No. 21 drill bit (0.159"), ensuring accurate hole sizing and reduced installation errors
  • Regulatory compliance with RoHS 3 and REACH standards, meeting industrial safety and environmental requirements

Professional Applications & Engineering Value

This M5 TRS tapping screw is engineered specifically for plastic assembly applications, where traditional fasteners often cause cracking or stripping. The thread forming design displaces material rather than cutting it, creating stronger threads with improved resistance to vibration loosening. Manufactured from 18-8 stainless steel, it provides exceptional corrosion resistance for outdoor equipment, electronic enclosures, and automotive components exposed to moisture or chemicals. The T20 Torx drive delivers superior torque transmission compared to Phillips or slotted drives, preventing damage during high-torque installations in dense plastics. With a 2.24mm thread pitch and fully threaded 18mm length, it ensures maximum holding power in various plastic thicknesses while the 90° countersink allows for flush mounting in designed applications.

Specification Summary & Compliance

This metric M5 x 18mm TRS tapping screw features a standard flat head with T20 Torx drive and blunt tip configuration. The thread forming design operates with No. 21 drill bit (0.159") preparation and 90° countersink angle for proper installation. Manufactured from 18-8 stainless steel with fully threaded right-hand orientation and 2.24mm approximate pitch. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for industrial use in plastic materials.

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