S-93180A240 1/4"-20 x 2" ASME B18.5 Carriage Bolts

Carriage Bolts

0851FA00009 Carriage Bolts
0851FA00009 Carriage Bolts

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

Part No.
Part No. 0851FA00009
Equivalent to mcmaster :
93180A240

Basic Information

System of Measurement Inch
Specifications Met ASME B18.5

Head Parameters

Head Type Rounded
Head Diameter 0.594"
Head Height 0.145"
Rounded Head Profile Wide
Rounded Head Style Carriage

Neck & Shank Parameters

Neck Type Square
Neck Length 0.16"
Neck Width 0.26"

Dimension Parameters

Length 2"
Screw Diameter 0.25"

Thread Parameters

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

Material & Strength Parameters

Material 316 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 corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and outdoor applications
  • Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under heavy loads
  • Secure anti-rotation design featuring a square neck that locks into materials to prevent spinning during installation
  • Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and reduced cross-threading risk
  • Enhanced durability with fully threaded right-hand design providing maximum grip length and load distribution
  • Industry-standard compliance meeting ASME B18.5 specifications for consistent quality and interchangeability
  • Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries

Professional Applications & Engineering Value

This 1/4"-20 UNC carriage bolt delivers critical engineering solutions for industrial applications where vibration resistance and corrosion protection are paramount. The 316 Stainless Steel composition provides exceptional resistance to chemicals, saltwater, and extreme temperatures, making it ideal for marine equipment, food processing machinery, and structural assemblies. The square neck design mechanically locks into mounting surfaces, eliminating rotation during torque application and preventing damage to connected materials. With fully threaded coarse spacing and Class 2A thread fit, installation is streamlined while maintaining precise tolerances. The wide rounded head distributes clamping force evenly, reducing surface damage while the 2" length accommodates various material thicknesses in construction, transportation, and heavy equipment applications.

Specification Summary & Compliance

This carriage bolt maintains Class 2A thread fit per UNC standards with precise 1/4"-20 coarse threading and right-hand direction. Manufacturing follows ASME B18.5 specifications for dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.

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