3/8-16 X 6 1/2" Carriage Bolts / 6" Thread/Steel/Zinc (Quantity: 175)
-
5% off when you buy 4 or more.
-
Get 5% off your next purchase.
-
Enjoy free delivery on orders above A$300.
-
Orders are processed and shipped from Victoria, Australia.
3-6 days (Domestic)
30-Day Return Guarantee
Confidence-backed purchases with 30-day return support.
- Carriage Bolts
- Round Head/ Square Neck
- Manufactured to ASME B18.5 specifications
- Zinc Plated Low Carbon Steel
- Coarse Thread / 6" Thread
A carriage bolt, coach bolt or round head square neck bolt is a form of bolt used to fasten metal to wood. It is distinguished from other bolts by its shallow mushroom head and that the shank cross-section of the bolt is circular for most of its length, as usual, but the portion immediately beneath the head is formed into a square section. This makes the bolt self-locking when placed through a square hole in a metal strap, or a round hole in most wood. This allows the fastener to be installed with only a single tool, a spanner or wrench, working from one side. The head of a carriage bolt is usually a shallow dome. The squared section is of the same size as the diameter of the bolt shank, with a plain unthreaded shank. Carriage bolts were developed for use through iron strengthening plates on either side of a wooden beam. It is commonplace though to use them to bare timber, the squared section giving enough grip to prevent rotation. Carriage bolts are extensively used in security fixings, such as the Brenton Bolt where the bolt must only be removable from one side. The smooth domed head and square nut below prevent the carriage bolt from being unlocked from the insecure side.
Package Dimensions:
. Weight: 32.0 lb
Specification:
| Item Weight | 32 Pounds |
| Grade Rating | A307 Grade A |
| Material | Steel |
| Thread Size | 3/8"-16 |
| Head Style | Round |
| Exterior Finish | Zinc |
| Manufacturer | Newport Fasteners |
Shipping & Delivery
At SecretGreen, we aim to deliver your order as quickly and safely as possible.
Domestic Shipping :
Orders are typically delivered within 3–6 business days.
International Shipping:
Estimated delivery time is 12–26 business days, depending on the destination and customs processing.
You will receive a tracking number once your order has been dispatched. Delivery times may vary during holidays or due to unforeseen delays.