S-92845A530 1/4"-20 x 5/16" ASME B18.3 Set Screws

Set Screws

0658FA00029 Set Screws
0658FA00029 Set Screws

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

Part No.
Part No. 0658FA00029
Equivalent to mcmaster :
92845A530

Basic Information

System of Measurement Inch

Head Parameters

Head Type Headless

Dimensions

Length 5/16"

Thread Parameters

Thread Type UNC
Thread Size 1/4"-20
Thread Diameter 0.25"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 3A

Tip & Drive Parameters

Tip Type Extended
Tip Length 0.067"
Tip Length Tolerance -0.005" to 0"
Tip Diameter 0.156"
Tip Diameter Tolerance -0.007" to 0"
Drive Style Hex
Drive Size 1/8"

Material & Strength

Material 18-8 Stainless Steel
Hardness Rockwell B80

Temperature & Environment

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

  • Exceptional corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
  • Superior holding power achieved through Class 3A thread fit precision and coarse UNC threading
  • Extended tip design provides deeper penetration and enhanced grip on mating components
  • High durability with Rockwell B80 hardness for reliable performance under repeated use
  • Secure installation using standard 1/8" hex drive tools, preventing stripping and ensuring consistent torque
  • Headless configuration allows for flush mounting in space-constrained applications
  • Full regulatory compliance with ASME B18.3 standards, RoHS 3, and REACH for global industrial use

Professional Applications & Engineering Value

This 1/4"-20 UNC set screw delivers critical engineering solutions where component slippage and corrosion are primary concerns. The 18-8 Stainless Steel material provides excellent resistance to rust and chemical exposure, making it suitable for manufacturing equipment, automotive assemblies, and outdoor machinery. The extended tip design ensures maximum contact with the shaft or component, preventing rotational movement in high-vibration environments. Combined with the Class 3A thread fit and coarse UNC threading, this hex socket set screw maintains precise alignment and clamping force, reducing maintenance frequency and improving operational reliability across various industrial applications.

Specification Summary & Compliance

Manufactured to exact ASME B18.3 specifications with Class 3A thread fit for superior dimensional accuracy. Features 1/4"-20 UNC coarse threads with right-hand direction, 1/8" hex drive, and extended tip dimensions (0.156" diameter, 0.067" length). Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global industrial markets.

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