S-91264A242 10-24 ASME B18.3, ASTM A574 Shoulder Screws

Shoulder Screws

0559FA00013 Shoulder Screws
0559FA00013 Shoulder Screws

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

Part No.
Part No. 0559FA00013
Equivalent to mcmaster :
91264A242

Basic Information

System of Measurement Inch

Head Parameters

Head Type Socket
Head Diameter 3/8"
Head Height 3/16"
Head Texture Knurled
Socket Head Profile Standard

Dimensions

Shoulder Diameter 1/4"
Shoulder Diameter Tolerance -0.004" to -0.002"
Shoulder Fit Standard
Shoulder Length 1/2"
Shoulder Length Tolerance -0.005" to 0.005"

Thread Parameters

Thread Type UNC
Thread Size 10-24
Thread Diameter 0.19"
Thread Spacing Coarse
Thread Length 3/8"
Thread Direction Right Hand
Thread Fit Class 3A
Locking Type Thread Locker
Thread Locker Type Nylon Pellet
Thread Locker Temperature Range -50° to 250° F

Tip & Drive Parameters

Drive Style Hex
Drive Size 1/8"

Material & Strength

Material Alloy Steel
Finish Black Oxide
Hardness Rockwell C32
Tensile Strength 140000 psi
Minimum Shear Strength 84000 psi

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met ASME B18.3, ASTM A574
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Exceptional Tensile and Shear Strength – Withstands up to 140,000 psi tensile and 84,000 psi shear loads, ensuring reliable performance in high-stress industrial environments.
  • Superior Corrosion Resistance – Black oxide finish protects against rust and wear, extending service life in demanding conditions.
  • Secure Vibration-Resistant Locking – Integrated nylon pellet thread locker maintains clamp force from -50° to 250°F, preventing loosening under dynamic loads.
  • Precision Class 3A Thread Fit – Delivers tight tolerances and smooth assembly, reducing the risk of cross-threading and improving joint integrity.
  • Knurled Socket Head for Enhanced Grip – Allows for easy installation and removal with standard hex tools, even in confined spaces.
  • Durable Alloy Steel Construction – Hardened to Rockwell C32 for high wear resistance and long-term durability in repetitive applications.
  • Compliant with Industry Standards – Meets ASME B18.3 specifications and is RoHS 3 & REACH compliant, ensuring safety and regulatory adherence.

Professional Applications & Engineering Value

This 10-24 UNC shoulder screw is engineered to address common challenges in precision assembly, such as misalignment, vibration-induced failure, and corrosion. The alloy steel core, combined with a black oxide finish, provides robust resistance to environmental factors, making it ideal for machinery, automotive, and aerospace components. The nylon pellet thread locker ensures stable performance across a wide temperature range (-50° to 250°F), critical for applications subject to thermal cycling. With a Class 3A thread fit and knurled socket head, it facilitates quick, secure installation in jigs, pivots, and rotating assemblies, reducing downtime and maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 standards, with a Class 3A thread fit for precise engagement. Key dimensions include a 3/8" thread length and 1/2" shoulder length, with tight tolerances on shoulder diameter and length. It is manufactured from alloy steel per ASTM A574, and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use.

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