S-93516A155 3/8"-24 x 1 1/4" ASME B18.2.1 Bronze Hex Head Screws

Bronze Hex Head Screws

0255FA00033 Bronze Hex Head Screws
0255FA00033 Bronze Hex Head Screws

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

Part No.
Part No. 0255FA00033
Equivalent to mcmaster :
93516A155

Basic Information

System of Measurement Inch

Head Parameters

Head Type Hex
Head Width 9/16"
Head Height 15/64"

Dimensions

Length 1 1/4"

Thread Parameters

Thread Type UNF
Thread Size 3/8"-24
Thread Diameter 0.375"
Thread Spacing Fine
Thread Direction Right Hand
Thread Fit Class 2A
Threading Fully Threaded

Tip & Drive Parameters

Drive Style External Hex

Material & Strength

Material 651 Silicon Bronze
Hardness Rockwell B70
Tensile Strength 70000 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

  • Exceptional corrosion resistance for long service life in marine and harsh chemical environments
  • High tensile strength of 70,000 PSI ensures reliable performance under heavy loads and stress
  • Superior durability with Rockwell B70 hardness to resist wear and deformation
  • Precise Class 2A thread fit for easy assembly and secure fastening without cross-threading
  • Fully threaded UNF fine pitch design provides maximum grip and vibration resistance
  • External hex drive head allows for high-torque installation with standard tools
  • Compliance with major industry standards including ASME B18.2.1, RoHS 3, and REACH

Professional Applications & Engineering Value

This 3/8"-24 UNF silicon bronze hex head screw is specifically engineered to address critical challenges in demanding industrial applications. The 651 silicon bronze material provides outstanding resistance to saltwater corrosion, making it ideal for marine equipment, shipbuilding, and offshore structures. The fine UNF thread spacing and Class 2A thread fit ensure precise engagement and superior vibration resistance in high-stress assemblies. With its external hex drive design, installers can apply significant torque without slippage, while the fully threaded construction maximizes holding power across the entire 1 1/4" length. These features combine to deliver reliable performance in chemical processing plants, coastal infrastructure, and other corrosive environments where fastener failure is not an option.

Specification Summary & Compliance

This heavy-duty fastener features Class 2A thread fit tolerance for consistent assembly performance and meets ASME B18.2.1 specifications for dimensional accuracy. The 3/8"-24 UNF fine thread configuration ensures proper engagement in precision applications. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of restricted hazardous substances. These compliance standards make this screw suitable for global industrial supply chains and environmentally sensitive projects.

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