S-91273A721 3/4"-10 Shoulder Screws

Shoulder Screws

0544FA00443 Shoulder Screws
0544FA00443 Shoulder Screws

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

Part No.
Part No. 0544FA00443
Equivalent to mcmaster :
91273A721

Basic Information

System of Measurement Inch

Head Parameters

Head Type Socket
Head Diameter 1"
Head Height 1/2"
Head Texture Knurled
Socket Head Profile Standard

Dimensions

Shoulder Diameter 3/4"
Shoulder Diameter Tolerance -0.004" to -0.002"
Shoulder Fit Standard
Shoulder Length 4"
Shoulder Length Tolerance -0.005" to 0.005"

Thread Parameters

Thread Type UNC
Thread Size 3/4"-10
Thread Diameter 0.75"
Thread Spacing Coarse
Thread Length 7/8"
Thread Direction Right Hand
Thread Fit Class 2A

Tip & Drive Parameters

Drive Style Hex
Drive Size 3/8"

Material & Strength

Material 18-8 Stainless Steel
Finish Black Oxide
Hardness Rockwell B55
Tensile Strength 70000 psi
Minimum Shear Strength 35000 psi

Temperature & Environment

REACH Compliant
RoHS Compliant
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 material, ideal for harsh industrial environments.
  • Enhanced durability and wear resistance from the Black Oxide finish, reducing maintenance needs.
  • High tensile strength of 70,000 psi ensures reliable performance under heavy loads and stress.
  • Secure and precise assembly with a Class 2A thread fit and coarse UNC threading for quick, stable fastening.
  • Easy installation and removal using the 3/8" hex drive and knurled head for improved grip.
  • Accurate alignment and spacing due to the 4" shoulder length with tight tolerances, minimizing component misalignment.
  • Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use.

Professional Applications & Engineering Value

This heavy-duty shoulder screw is engineered to address common industrial challenges such as component misalignment, vibration loosening, and corrosion in demanding applications. Made from 18-8 Stainless Steel with a Black Oxide finish, it offers excellent resistance to rust and wear, extending service life in machinery, automotive assemblies, and precision equipment. The 3/4"-10 UNC coarse thread and 4" shoulder length provide stable fastening and accurate positioning, reducing downtime and maintenance costs. Its socket head design with a 3/8" hex drive allows for easy access in confined spaces, making it a reliable choice for engineers seeking high-performance shoulder screws that meet rigorous industrial standards.

Specification Summary & Compliance

This shoulder screw features a Class 2A thread fit for precise tolerance, adhering to UNC standards for reliable performance. Key dimensions include a shoulder diameter of 3/4" with a tolerance of -0.004" to -0.002" and a shoulder length of 4" with a tolerance of -0.005" to 0.005". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for various industrial applications.

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