S-93516A177 1/2"-13 x 7" ASME B18.2.1 Bronze Hex Head Screws

Bronze Hex Head Screws

0255FA00049 Bronze Hex Head Screws
0255FA00049 Bronze Hex Head Screws

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

Part No.
Part No. 0255FA00049
Equivalent to mcmaster :
93516A177

Basic Information

System of Measurement Inch

Head Parameters

Head Type Hex
Head Width 3/4"
Head Height 5/16"

Dimensions

Length 7"

Thread Parameters

Thread Type UNC
Thread Size 1/2"-13
Thread Diameter 0.5"
Thread Spacing Coarse
Minimum Thread Length 1 1/2"
Thread Direction Right Hand
Thread Fit Class 2A
Threading Partially 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 from 651 Silicon Bronze material, ideal for harsh marine and industrial environments
  • High tensile strength of 70,000 psi ensures reliable performance under heavy loads and stress
  • Rockwell B70 hardness provides superior durability and resistance to wear and deformation
  • Class 2A thread fit with UNC coarse threading enables quick assembly and secure fastening
  • External hex drive design allows for easy installation with standard tools
  • Partial threading offers optimal grip and clamping force for specific applications
  • Compliance with ASME B18.2.1, RoHS 3, and REACH ensures quality, safety, and environmental standards

Professional Applications & Engineering Value

These 1/2"-13 UNC silicon bronze hex head screws are engineered to address critical challenges in demanding environments. The 651 silicon bronze composition delivers outstanding corrosion resistance, making them perfect for marine applications, chemical processing plants, and coastal infrastructure where saltwater exposure is a concern. The coarse UNC threading and partial thread design provide superior holding power in softer materials while resisting vibration loosening. With 70,000 psi tensile strength and Rockwell B70 hardness, these screws maintain structural integrity under extreme conditions, reducing replacement frequency and maintenance costs. The external hex drive ensures compatibility with standard industrial tools, streamlining installation in confined spaces.

Specification Summary & Compliance

This 7-inch hex head screw features precise Class 2A thread fit with 1/2"-13 UNC coarse threading and partial threading up to 1½" minimum length. Manufactured to ASME B18.2.1 specifications for dimensional accuracy and performance reliability. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.

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