S-97646A248 1/4"-20 x 3/8" 18-8 Stainless Steel Serrated-Flange Hex Head Screws

18-8 Stainless Steel Serrated-Flange Hex Head Screws

0279FA00030 18-8 Stainless Steel Serrated-Flange Hex Head Screws
0279FA00030 18-8 Stainless Steel Serrated-Flange Hex Head Screws

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

Part No.
Part No. 0279FA00030
Equivalent to mcmaster :
97646A248

Basic Information

Screw Features Flanged
System of Measurement Inch

Head Parameters

Head Type Hex
Head Width 3/8"
Head Height 9/32"

Dimensions

Length 3/8"
Flange Diameter 9/16"

Thread Parameters

Thread Type UNC
Thread Size 1/4"-20
Thread Diameter 0.25"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 2A
Threading Fully Threaded
Locking Type Serrations

Tip & Drive Parameters

Drive Style External Hex

Material & Strength

Material 18-8 Stainless Steel
Hardness Rockwell B100
Tensile Strength 100000 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, ideal for harsh industrial environments
  • Exceptional holding power from 100,000 psi tensile strength for demanding applications
  • Enhanced load distribution through integrated flange design, eliminating the need for separate washers
  • Reliable thread engagement with UNC coarse threading and Class 2A fit for consistent performance
  • Easy installation and removal using standard external hex drive tools
  • Optimized material hardness at Rockwell B100 for durability without brittleness
  • Full regulatory compliance with RoHS 3 and REACH standards for global market acceptance

Professional Applications & Engineering Value

This 18-8 stainless steel hex head screw delivers critical performance advantages in industrial settings where corrosion resistance and structural integrity are paramount. The flanged design provides superior bearing surface distribution, preventing surface damage and maintaining joint integrity under vibration. With fully threaded UNC coarse threading and Class 2A fit, installation is streamlined while ensuring reliable thread engagement in various materials. The external hex drive accommodates standard tools for efficient assembly in confined spaces. These heavy-duty screws are engineered for machinery, equipment manufacturing, and structural applications requiring 100,000 psi tensile strength and long-term reliability in challenging environments.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread specifications. The screw features a 1/4"-20 thread size, 3/8" length, and 9/16" flange diameter. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance. The 18-8 stainless steel material provides consistent performance with Rockwell B100 hardness and full threading for maximum holding capability.

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