Carriage Bolts
Zinc plated carriage bolts (coach bolts) from 3/16" (10-24) to 3/4-10 and 1/2" to 20" long. The round domed head has a square neck that locks into wood so the bolt won't turn as you tighten the nut. Choose a size below.
Specifications
- Head: round (mushroom) head with square neck
- Thread: USS coarse; full thread up to 6", 6" of thread on longer bolts
- Sizes: 3/16 (10-24), 1/4-20, 5/16-18, 3/8-16, 7/16-14, 1/2-13, 5/8-11, 3/4-10
- Finish: zinc plated
Carriage Bolts also known as Coach Bolts; are usually fully threaded up to 6" long.
Bolts over 6" long usually have 6" of thread.
The square neck of these bolts recess into wood to prevent the bolts from turning when nut is tightened.
Common Uses
- Decks, fences and docks
- Wood framing and playground sets
- Trailer beds and truck bodies
- Wood to metal connections
FAQ
How do carriage bolts work?
The square neck under the round head pulls into the wood as the nut is tightened, so the bolt can't turn. Only the nut side needs a wrench, and the smooth domed head is hard to remove from the outside.
What finish do these bolts have?
Zinc plating (clear or yellow) resists rust indoors and in dry areas. Plain (black) steel has only a light oil and should be painted or kept dry. For outdoor or wet use, choose hot dip galvanized or stainless steel bolts.
What size hole do I drill for a carriage bolt?
Drill the same diameter as the bolt, then tap the head down so the square neck seats in the wood before tightening the nut.
Related: Galvanized Carriage Bolts | Stainless Carriage Bolts | Step Bolts | Grade 5 Shaker Screen Carriage Bolts | Grade 2 Hex Nuts | USS Flat Washers
Free shipping on orders over $100, and orders placed before noon EST ship the same day. Purchase orders are accepted from government agencies, schools, hospitals, municipalities and companies with established credit with The Nutty Company, Inc.