S-98256A301 10-24 ASME B18.3 Shoulder Screws

Shoulder Screws

0550FA00015 Shoulder Screws
0550FA00015 Shoulder Screws

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

Part No.
Part No. 0550FA00015
Equivalent to mcmaster :
98256A301

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 1/4"
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

Tip & Drive Parameters

Drive Style Hex
Drive Size 1/8"

Material & Strength

Material Grade 2 Titanium
Hardness Rockwell B80
Tensile Strength 40000 psi
Minimum Shear Strength 20000 psi

Temperature & Environment

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

  • Exceptional corrosion resistance and lightweight strength from Grade 2 Titanium construction, ideal for demanding environments
  • Precise component alignment with a 1/4" shoulder diameter and controlled tolerances for reliable assembly
  • High tensile strength of 40,000 psi ensures secure fastening under significant mechanical loads
  • Superior thread engagement with Class 3A fit and 10-24 UNC coarse threads for vibration resistance
  • Easy installation and removal using the hex socket drive and knurled head for improved grip
  • Long-term operational reliability backed by Rockwell B80 hardness and 20,000 psi minimum shear strength
  • Compliance with major industrial standards including ASME B18.3, RoHS 3, and REACH for safe, global use

Professional Applications & Engineering Value

This Grade 2 Titanium Shoulder Screw is engineered to address common industrial challenges such as component misalignment, corrosion in harsh environments, and the need for lightweight yet durable fastening solutions. The 1/4" precision shoulder provides a consistent bearing surface, ensuring accurate positioning in assemblies like rotating shafts, linkages, and precision instruments. Its 10-24 UNC coarse thread with Class 3A fit offers excellent resistance to loosening under vibration, while the hex socket drive and knurled head facilitate secure tool engagement in tight spaces. Made from Grade 2 Titanium, it delivers high strength-to-weight ratio and corrosion resistance, making it suitable for aerospace, medical devices, and high-performance machinery where reliability and compliance with ASME B18.3 standards are critical.

Specification Summary & Compliance

This shoulder screw features a 10-24 UNC thread with Class 3A fit for precise thread engagement, a shoulder diameter of 1/4" with tight tolerances (-0.004" to -0.002"), and a shoulder length of 1/4" with tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safety and regulatory adherence for industrial applications.

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