3/8 x 3 galvanized carriage bolt round head square neck side view
3/8 x 3 galvanized carriage bolt round head square neck side view
3/8 x 3 galvanized carriage bolt round head square neck side view

3/8-inch × 3-inch Hot-Dipped Galvanized Carriage Bolts

✔ 100% satisfaction guarantee

$13.25 - $24.50
/
The Contractors Site

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Delivery by arrangement: Buying heavy or bulk materials? Delivery by The Contractors Site may be available, depending on your location and order size. Contact us before placing your order to confirm availability, timing, and the delivery charge.

Hillman Paulin Galvanized Carriage Bolts

These 3/8-inch diameter × 3-inch carriage bolts have a round head and square neck, with a hot-dipped galvanized finish. Select the pack size needed for your project.

Follow the manufacturer's installation instructions and your project's fastening specifications. Confirm thread compatibility, matching nuts and washers, hole dimensions and coating suitability before installation. For structural or load-bearing connections, use the exact fastener and installation method specified for the connection.

The Contractors Site
TCS Loft

Available for pickup

Usually ready in 24 hours

3/8 x 3 galvanized carriage bolt round head square neck side view
3/8 x 3 galvanized carriage bolt round head square neck side view
25 TCS-CB-3/8X3-25
$13.25 /each
3/8 x 3 galvanized carriage bolt round head square neck side view
50 TCS-CB-3/8X3-50
$17.75 /each
3/8 x 3 galvanized carriage bolt round head square neck side view
100 TCS-CB-3/8X3-100
$24.50 /each
Total:
3/8-inch × 3-inch Hot-Dipped Galvanized Carriage Bolts

Available for pickup

Usually ready in 24 hours

TCS Loft

Available for pickup

Usually ready in 24 hours

20 Maplecrest Lane
Brantford ON N3R 7V1
Canada

+19056388898

Square Neck Prevents Spinning on Install

The square shoulder under the dome bites into the wood as you tighten the nut, locking the bolt in place without needing a second tool — a real time-saver on high-volume installations.

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We specialize in high-quality tools for calculating, measuring, leveling, and locating, essential for contractors and professionals in the construction industry. Our inventory includes laser measures, levels, stud finders, measuring tapes, and more.

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