S-92356A593 5/16"-18 x 2 1/2" ASME B18.5 Carriage Bolts

Carriage Bolts

0850FA00124 Carriage Bolts
0850FA00124 Carriage Bolts

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

Part No.
Part No. 0850FA00124
Equivalent to mcmaster :
92356A593

Basic Information

System of Measurement Inch
Specifications Met ASME B18.5

Head Parameters

Head Type Rounded
Head Diameter 0.719"
Head Height 0.176"
Rounded Head Profile Wide
Rounded Head Style Carriage

Neck & Shank Parameters

Neck Type Square
Neck Length 0.19"
Neck Width 0.32"

Dimension Parameters

Length 2 1/2"
Screw Diameter 0.3125"

Thread Parameters

Thread Type UNC
Thread Size 5/16"-18
Threading Fully Threaded
Thread Direction Right Hand
Thread Spacing Coarse
Thread Fit Class 2A

Material & Strength Parameters

Material 18-8 Stainless Steel
Hardness Rockwell B55
Tensile Strength 70000 psi

Finish & Compliance Parameters

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 anti-rotation performance with integrated square neck design that prevents spinning during installation and under vibration
  • Exceptional corrosion resistance provided by 18-8 stainless steel construction, ideal for harsh industrial environments
  • High tensile strength rating of 70,000 psi ensures reliable performance in demanding load-bearing applications
  • Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and secure fastening
  • Wide rounded head profile distributes clamping force effectively while providing a finished appearance
  • Full threading capability allows for maximum adjustability and versatility across various material thicknesses
  • Regulatory compliance assurance with RoHS 3 and REACH standards for environmentally responsible sourcing

Professional Applications & Engineering Value

This 5/16"-18 UNC carriage bolt delivers critical engineering solutions where vibration resistance and corrosion protection are paramount. The square neck design mechanically locks into mating materials, eliminating rotational movement that compromises joint integrity in structural applications, machinery assemblies, and transportation equipment. Manufactured from 18-8 stainless steel, it maintains mechanical properties in corrosive environments where carbon steel fasteners would fail. The coarse UNC threading provides excellent engagement in wood, soft metals, and composite materials, while the fully threaded configuration accommodates varying material thicknesses without requiring multiple bolt lengths. These features make it ideal for industrial maintenance, construction projects, and outdoor equipment where reliability cannot be compromised.

Specification Summary & Compliance

This carriage bolt maintains precise Class 2A thread fit tolerances with 5/16"-18 UNC coarse threading and right-hand thread direction. Manufacturing conforms to ASME B18.5 standards ensuring dimensional consistency and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety requirements for industrial use across global markets.

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