5/16"-18 x 2 1/4" Carriage Bolts A307 Grade A ZINC CR+3, Full Thread, Size: 5/16"-18, Length: 2-1/4", Head: Round, Drive: External Square, Material: Steel, Finish: Zinc (Inch) (Quantity: 125)

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New $90.00 (tax included) Number of stocks: 1

Used $36.00 (tax included) New Arrivals and Restocks Number in stock: 1

$54.00 cheaper than the new price!!

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New $90.00

Management number	211257498	Release Date	2026/04/04	List Price	$36.00	Model Number	211257498
Category	Industrial & Scientific Fasteners Bolts Carriage Bolts

Jet Fitting & Supply Corporation has been selling CARRIAGE BOLTS since 1946. Trust in Jet to deliver you high quality fasteners!

Jet Fitting & Supply Corporation has been providing fasteners since 1946. Feel safe when buying from Jet!
Carriage Bolts, also called Coach Bolts or Round Head Square Neck Bolts, from Jet Fitting have a dome shaped head and square neck.
Carriage Bolts are typically used for wood construction like docks, swing sets, outdoor decks along with other surfaces where a smooth surface is needed
The square shoulder under a round head allows the bolt to resist turning when the nut is tightened.
All carriage bolts under 6 inches are fully threaded, lengths over 6" always have 6 inches of thread.

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