Stainless Carriage Bolts
18-8 stainless steel carriage bolts with a round domed head and square neck, from 3/16" (10-24) to 5/8"-11 and up to 9" long. They won't rust or stain wood, so they are the choice for docks, decks, fences and boat trailers. Choose a size below.
Specifications
- Material: 18-8 stainless steel
- Head: round (mushroom) head, square neck
- Thread: USS coarse (UNC)
- Sizes: 3/16", 1/4-20, 5/16-18, 3/8-16, 1/2-13, 5/8-11
- Lengths: 1/2" to 9"
Carriage Bolts
18-8 Stainless Steel
Common Uses
- Docks, piers and boardwalks
- Decks, fences and pergolas
- Boat trailers and bunks
- Playground and outdoor furniture
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 head is hard to remove from outside.
What size hole do I drill for a carriage bolt?
Drill the same size as the bolt diameter, such as 3/8" for a 3/8" bolt, so the square neck can bite into the wood.
Should I use 18-8 or 316 stainless?
18-8 is fine for most outdoor and wet jobs. 316 stainless adds molybdenum for better resistance to salt water, chlorides and many chemicals, so it is the better choice for boats, docks, pools and coastal sites. Contact us for 316 stainless.
Related: Stainless Hex Nuts | Stainless Fender Washers | Stainless Lag Bolts | Carriage Bolts
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.