S-92240A106 1/4"-28 x 3/4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

18-8 Stainless Steel Hex Head Screws

0244FA00645 18-8 Stainless Steel Hex Head Screws
0244FA00645 18-8 Stainless Steel Hex Head Screws

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

Part No.
Part No. 0244FA00645
Equivalent to mcmaster :
92240A106

Basic Information

System of Measurement Inch

Head Parameters

Head Type Hex
Head Width 7/16"
Head Height 5/32"

Dimensions

Length 3/4"

Thread Parameters

Thread Type UNF
Thread Size 1/4"-28
Thread Diameter 0.25"
Thread Spacing Fine
Thread Direction Right Hand
Thread Fit Class 2A
Threading Fully Threaded

Tip & Drive Parameters

Drive Style External Hex

Material & Strength

Material 18-8 Stainless Steel
Hardness Rockwell B70
Tensile Strength 80000 psi

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met ASME B18.2.1
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 corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
  • High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration
  • Precise Class 2A thread fit provides consistent engagement and reduces cross-threading risks
  • External hex drive design allows for high-torque installation with standard tools
  • Full threading along the 3/4" length maximizes grip and distribution of clamping force
  • Fine UNF thread pattern delivers enhanced holding power in materials prone to stripping
  • Rockwell B70 hardness maintains thread integrity and resistance to wear over repeated use

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this 1/4"-28 UNF hex head screw addresses critical fastening challenges where corrosion resistance and mechanical strength are paramount. The 18-8 stainless steel material prevents rust and degradation in moist or chemical-exposed settings, such as machinery assembly, automotive components, and outdoor structures. Its fine thread spacing and fully threaded right-hand design ensure secure fastening in brittle materials or thin sections, reducing the likelihood of loosening under dynamic loads. The external hex drive facilitates quick installation and removal with common wrenches, streamlining maintenance and repair workflows while upholding ASME B18.2.1 dimensional standards for interoperability.

Specification Summary & Compliance

This screw adheres to ASME B18.2.1 specifications, with a Class 2A thread fit for consistent accuracy and a UNF fine thread size of 1/4"-28. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory alignment for global supply chains.

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