S-91900A201 8-32 x 5/16" ASME B18.3 Tamper-Resistant Torx Stainless Steel Button Head Screws

Tamper-Resistant Torx Stainless Steel Button Head Screws

0204FA00017 Tamper-Resistant Torx Stainless Steel Button Head Screws
0204FA00017 Tamper-Resistant Torx Stainless Steel Button Head Screws

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

Part No.
Part No. 0204FA00017
Equivalent to mcmaster :
91900A201

Basic Information

System of Measurement Inch

Head Parameters

Head Type Rounded
Head Diameter 0.312"
Head Height 0.087"
Rounded Head Profile Standard
Rounded Head Style Button

Dimensions

Length 5/16"

Thread Parameters

Thread Type UNC
Thread Size 8-32
Thread Diameter 0.164"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 3A
Threading Fully Threaded

Tip & Drive Parameters

Drive Style Tamper-Resistant Torx
Drive Size T15

Material & Strength

Material 18-8 Stainless Steel
Finish Passivated
Hardness Rockwell B70
Tensile Strength 70000 psi

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met ASME B18.3
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Enhanced tamper resistance with T15 Torx drive prevents unauthorized removal, securing critical equipment and infrastructure.
  • Superior corrosion resistance from 18-8 Stainless Steel and passivated finish ensures long-term reliability in harsh environments.
  • High tensile strength of 70,000 psi and Rockwell B70 hardness provide exceptional durability and load-bearing capacity.
  • Precise Class 3A thread fit ensures smooth installation and secure, vibration-resistant fastening.
  • Fully threaded 8-32 UNC coarse thread design offers maximum grip and holding power across the entire screw length.
  • Rounded button head profile delivers a low-profile, aesthetically clean finish while minimizing snagging risks.
  • Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH guarantees safety and regulatory adherence.

Professional Applications & Engineering Value

Engineered for demanding industrial and security applications, these 18-8 Stainless Steel rounded head screws address critical challenges like tampering, corrosion, and mechanical failure. The tamper-resistant T15 Torx drive provides a secure fastening solution for public infrastructure, electronic enclosures, and machinery where unauthorized access is a concern. The combination of a passivated finish and stainless steel material ensures reliable performance in moist or chemically aggressive environments, reducing maintenance frequency and lifecycle costs. With a coarse UNC thread and Class 3A fit, these screws offer quick, stable installation in various substrates, making them ideal for assembly lines, HVAC systems, and outdoor equipment where vibration resistance and long-term integrity are paramount.

Specification Summary & Compliance

This screw features precise Class 3A thread fit and conforms to UNC coarse thread standards (8-32 size). Manufacturing and dimensional accuracy adhere to ASME B18.3 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in regulated markets.

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