S-90402A155 6-32 x 1 1/4" ASME B18.13 Steel Pan Head Phillips Screws with External-Tooth Lock Washer

Steel Pan Head Phillips Screws with External-Tooth Lock Washer

0189FA00021 Steel Pan Head Phillips Screws with External-Tooth Lock Washer
0189FA00021 Steel Pan Head Phillips Screws with External-Tooth Lock Washer

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

Part No.
Part No. 0189FA00021
Equivalent to mcmaster :
90402A155

Basic Information

Screw Features With Washer
System of Measurement Inch

Head Parameters

Head Type Rounded
Head Diameter 0.27"
Head Height 0.097"
Rounded Head Profile Standard
Rounded Head Style Pan

Dimensions

Length 1 1/4"

Thread Parameters

Thread Type UNC
Thread Size 6-32
Thread Diameter 0.138"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 2A
Threading Fully Threaded
Locking Type Lock Washer

Tip & Drive Parameters

Drive Style Phillips
Drive Size No. 2

Washer & Nut

Washer Type External-Tooth Lock
Washer Material Zinc-Plated Steel
Washer OD 0.285"
Washer Thickness 0.02"

Material & Strength

Material Zinc-Plated Steel
Hardness Rockwell B69
Tensile Strength 60000 psi

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met ASME B18.13
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 vibration resistance with an integrated external-tooth lock washer that prevents loosening under dynamic loads, ensuring long-term joint integrity.
  • High tensile strength of 60,000 psi provides reliable holding power for demanding industrial applications, reducing the risk of fastener failure.
  • Zinc-plated steel construction offers excellent corrosion resistance, extending service life in various environmental conditions.
  • Fully threaded UNC coarse design allows for faster installation and stronger grip in a wide range of materials, improving assembly efficiency.
  • Class 2A thread fit ensures consistent, precise engagement with mating parts, minimizing cross-threading and enhancing reliability.
  • Phillips pan head drive facilitates easy driving with standard tools, reducing installation time and labor costs.
  • Compliance with ASME B18.13, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations, supporting responsible sourcing.

Professional Applications & Engineering Value

This zinc-plated steel Phillips pan head screw with an external-tooth lock washer is engineered to address common industrial challenges such as vibration-induced loosening and corrosion. The coarse UNC threads and Class 2A fit provide quick, secure fastening in metal, plastic, and composite assemblies, reducing installation errors. With a 60,000 psi tensile strength and Rockwell B69 hardness, it withstands high-stress conditions in machinery, automotive, and electrical enclosures. The fully threaded design ensures maximum grip length, while the lock washer enhances vibration resistance, making it ideal for applications where reliability and durability are critical.

Specification Summary & Compliance

This screw features a 6-32 thread size with UNC coarse threading and Class 2A thread fit for precise dimensional accuracy. It is manufactured from zinc-plated steel with a length of 1-1/4 inch and includes an external-tooth lock washer. Compliance is confirmed with ASME B18.13 specifications, RoHS 3 (2015/863/EU), and REACH (EC 1907/2006), ensuring it meets rigorous industry and environmental standards for safe, reliable use.

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