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5/16"-18 Carriage bolts have a domed or countersunk head, and the shank is topped by a short square section under the head.
All Carriage Bolts over 6" in length are Partially Threaded
Diameter x Thread Pitch x Length from Under Head
FT: Fully Threaded
PT: Partially Threaded
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Volume Pricing: Buy in volume, get a discount. The larger the pack, the lower the cost per piece. Visit the New Site Features Page for additional details.
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