S-93516A540 1/4"-20 x 3/4" ASME B18.2.1 Bronze Hex Head Screws

Bronze Hex Head Screws

0255FA00077 Bronze Hex Head Screws
0255FA00077 Bronze Hex Head Screws

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

Part No.
Part No. 0255FA00077
Equivalent to mcmaster :
93516A540

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 UNC
Thread Size 1/4"-20
Thread Diameter 0.25"
Thread Spacing Coarse
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
Price available upon request. Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
  • Fast delivery
  • Enjoy discounts on bulk purchases
  • Secure Payment
  • Fast Global Shipping

Key Features & Benefits at a Glance

  • Superior corrosion resistance from 651 Silicon Bronze material, ideal for marine and harsh industrial environments
  • High tensile strength of 70,000 psi ensures reliable load-bearing capacity in demanding applications
  • Rockwell B70 hardness provides excellent durability and resistance to wear and deformation
  • Fully threaded UNC coarse pattern delivers faster installation and superior holding power
  • External hex drive design allows for easy installation with standard tools and high torque application
  • Class 2A thread fit ensures consistent, reliable engagement with mating components
  • Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees quality and environmental responsibility

Professional Applications & Engineering Value

These 651 Silicon Bronze hex head screws are engineered specifically for challenging environments where corrosion resistance and mechanical strength are critical. The UNC coarse thread pattern combined with Class 2A thread fit provides exceptional engagement in marine equipment, chemical processing plants, and coastal infrastructure. The external hex drive enables high-torque installation without stripping, while the fully threaded design ensures maximum holding strength along the entire fastener length. These marine grade screws solve common industry problems of fastener failure in saltwater exposure and chemical-rich atmospheres, making them ideal for boat building, offshore platforms, and wastewater treatment facilities where corrosion resistant fasteners are essential for long-term structural integrity.

Specification Summary & Compliance

This 1/4"-20 x 3/4" hex head screw features precise Class 2A thread fit with UNC coarse threading and right-hand thread direction. Manufactured to ASME B18.2.1 specifications, the fastener meets dimensional and performance requirements for industrial applications. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and safety standards. The combination of 70,000 psi tensile strength and Rockwell B70 hardness provides reliable mechanical performance across various industrial and marine applications.

🔍
Cancel