S-97832A221 6-32 Shoulder Screws

Shoulder Screws

0542FA00521 Shoulder Screws
0542FA00521 Shoulder Screws

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

Part No.
Part No. 0542FA00521
Equivalent to mcmaster :
97832A221

Basic Information

System of Measurement Inch

Head Parameters

Head Type Socket
Head Diameter 5/16"
Head Height 5/32"
Head Texture Knurled
Socket Head Profile Standard

Dimensions

Shoulder Diameter 3/16"
Shoulder Diameter Tolerance -0.004" to -0.002"
Shoulder Fit Standard
Shoulder Length 2"
Shoulder Length Tolerance -0.005" to 0.005"

Thread Parameters

Thread Type UNC
Thread Size 6-32
Thread Diameter 0.138"
Thread Spacing Coarse
Thread Length 3/16"
Thread Direction Right Hand
Thread Fit Class 3A

Tip & Drive Parameters

Drive Style Hex
Drive Size 3/32"

Material & Strength

Material 18-8 Stainless Steel
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 construction for long-lasting performance in harsh industrial environments
  • Precise component alignment enabled by the 2" shoulder with tight length tolerance (±0.005") for reliable assembly fit
  • High-strength thread engagement through Class 3A thread fit ensuring secure fastening in demanding applications
  • Exceptional mechanical durability with 70,000 psi tensile strength and 35,000 psi shear strength to withstand heavy loads
  • Secure tool engagement with hex socket drive and knurled head texture preventing slippage during installation
  • Optimized for quick assembly using coarse UNC threads and right-hand direction for efficient production workflows
  • Compliance with global standards including RoHS 3 and REACH for use in regulated industries worldwide

Professional Applications & Engineering Value

This 6-32 UNC shoulder screw delivers critical engineering value in precision applications where component alignment and rotational stability are paramount. The 18-8 stainless steel construction provides excellent corrosion resistance while maintaining Rockwell B55 hardness for durability in mechanical assemblies. The 2" shoulder length with controlled diameter tolerance acts as a precise pivot or spacer in machinery, eliminating the need for additional bushings. The Class 3A thread fit ensures tight engagement in industrial equipment, while the hex drive socket with knurled head prevents tool slippage during high-torque installation. These features combine to solve common assembly challenges in automation systems, precision instruments, and rotating mechanisms where vibration resistance and dimensional accuracy are critical.

Specification Summary & Compliance

This precision shoulder screw features 6-32 UNC coarse threads with Class 3A thread fit for superior engagement. The shoulder maintains a diameter tolerance of -0.004" to -0.002" and length tolerance of ±0.005" for precise fitment. Manufactured from 18-8 stainless steel with Rockwell B55 hardness, it delivers 70,000 psi tensile strength and 35,000 psi minimum shear strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety.

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