S-91273A646 3/8"-24 Shoulder Screws

Shoulder Screws

0544FA00388 Shoulder Screws
0544FA00388 Shoulder Screws

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

Part No.
Part No. 0544FA00388
Equivalent to mcmaster :
91273A646

Basic Information

System of Measurement Inch

Head Parameters

Head Type Socket
Head Diameter 9/16"
Head Height 1/4"
Head Texture Knurled
Socket Head Profile Standard

Dimensions

Shoulder Diameter 3/8"
Shoulder Diameter Tolerance -0.004" to -0.002"
Shoulder Fit Standard
Shoulder Length 5/16"
Shoulder Length Tolerance -0.005" to 0.005"

Thread Parameters

Thread Type UNF
Thread Size 3/8"-24
Thread Diameter 0.375"
Thread Spacing Fine
Thread Length 1/2"
Thread Direction Right Hand
Thread Fit Class 2A

Tip & Drive Parameters

Drive Style Hex
Drive Size 3/16"

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 thanks to 18-8 stainless steel with a black oxide finish, ideal for harsh industrial environments.
  • Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable performance under high stress.
  • Precise alignment and secure fit from the standard shoulder and Class 2A thread fit, reducing assembly errors and vibration loosening.
  • Easy installation and removal with a 3/16" hex drive and knurled head, providing a firm grip and reducing tool slippage.
  • Durable and hardened construction at Rockwell B55, offering long-lasting wear resistance and reduced maintenance needs.
  • Compliance with environmental regulations including RoHS 3 and REACH, making it safe for global industrial supply chains.
  • Versatile fine thread design with 3/8"-24 UNF right-hand threads, ensuring tight fastening in precision applications.

Professional Applications & Engineering Value

This shoulder screw is engineered to address common industrial challenges such as misalignment and component wear in machinery. Made from 18-8 stainless steel with a black oxide finish, it resists rust and corrosion in demanding settings like automotive assemblies, conveyor systems, and precision instruments. The knurled head and hex drive allow for quick, secure fastening, while the fine thread spacing and Class 2A thread fit ensure accurate positioning and reduced backlash. Its high tensile strength and shear strength make it ideal for applications requiring robust, repeatable performance, minimizing downtime and enhancing operational efficiency in B2B procurement scenarios.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent engagement and a shoulder diameter tolerance of -0.004" to -0.002". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. The UNF thread type and fine spacing support reliable fastening in industrial applications, backed by a Rockwell B55 hardness for durability.

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