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5/16"-18 Stainless Steel Carriage Bolts

Type 18-8 & 316 Stainless Steel

Choose from 4 diameters
Hard to find long lengths
Length is measured from under head to tip of screw
Threaded portion varies by bolt length
Be sure to use anti-seize compound or lubricant like WD-40 to prevent thread seizing.
Approved for use in ACQ Lumber

Need nuts and washers?
5/16" Nuts
5/16" Washers

1/4" 18-8SS & 316SS | 5/16" 18-8SS & 316SS | 3/8" 18-8SS & 316SS | 1/2" 18-8SS & 316SS

5/16"-1818-8 Stainless Steel

Length
Code
Price
Qty

1"
B100CB

Code: B100CB
Price: 1+ $0.20/each
100+ $0.18/each
Quantity:

1-1/4"
B114CB

Code: B114CB
Price: 1+ $0.21/each
100+ $0.20/each
Quantity:

1-1/2"
B112CB

Code: B112CB
Price: 1+ $0.24/each
100+ $0.22/each
Quantity:

2"
B200CB

Code: B200CB
Price: 1+ $0.32/each
100+ $0.29/each
Quantity:

2-1/2"
B212CB

Code: B212CB
Price: 1+ $0.36/each
100+ $0.33/each
Quantity:

3"
B300CB

Code: B300CB
Price: 1+ $0.42/each
100+ $0.38/each
Quantity:

3-1/2"
B312CB

Code: B312CB
Price: 1+ $0.50/each
100+ $0.45/each
Quantity:

4"
B400CB

Code: B400CB
Price: 1+ $0.60/each
100+ $0.54/each
Quantity:

5"
B500CB

Code: B500CB
Price: 1+ $0.73/each
100+ $0.66/each
Quantity:

6"
B600CB

Code: B600CB
Price: 1+ $0.80/each
100+ $0.72/each
Quantity:

8"
B800CB

Code: B800CB
Price: 1+ $4.82/each
50+ $4.34/each
Quantity:

9"
B900CB

Code: B900CB
Price: 1+ $9.95/each
50+ $8.95/each
Quantity:

10"
B1000CB

Code: B1000CB
Price: 1+ $10.55/each
Quantity:

5/16"-18316 Stainless Steel

Length
Code
Price
Qty

1"
B100CB6

Code: B100CB6
Price: 1+ $1.31/each
100+ $1.18/each
Quantity:

1-1/4"
B114CB6

Code: B114CB6
Price: 1+ $1.58/each
100+ $1.43/each
Quantity:

1-1/2"
B112CB6

Code: B112CB6
Price: 1+ $1.81/each
100+ $1.63/each
Quantity:

2"
B200CB6

Code: B200CB6
Price: 1+ $2.11/each
100+ $1.90/each
Quantity:

2-1/2"
B212CB6

Code: B212CB6
Price: 1+ $2.62/each
100+ $2.36/each
Quantity:

3"
B300CB6

Code: B300CB6
Price: 1+ $2.90/each
100+ $2.61/each
Quantity:

3-1/2"
B312CB6

Code: B312CB6
Price: 1+ $2.94/each
100+ $2.65/each
Quantity:

4"
B400CB6

Code: B400CB6
Price: 1+ $3.20/each
100+ $2.88/each
Quantity:

6"
B600CB6

Code: B600CB6
Price: 1+ $3.36/each
100+ $3.03/each
Quantity:

Additional Information
Q&A

Carriage Bolts have a square shoulder under a round head and are used with a nut and washer.

The shoulder of the carriage bolt pulls into the wood when tightening and prevents the bolt from turning.

Bolt length is measured starting under the head and finishing at the tip of the bolt.
Carriage bolt lengths of 4" and shorter are fully threaded. Depending upon the manufacturer, stainless steel carriage bolts over 4" may be fully threaded or have a smooth 2" or more between the head and beginning of threading.

Our stainless steel carriage bolts are available in both 18-8 & 316 stainless steel (for salt water exposure).
Type 316 Stainless Steel should always be specified for salt water applications. It contains molybdenum for superior corrosion resistance in salt water and other highly corrosive environments.

Diameters up to 3/4" available. Get A Quote

5/16"-18 Stainless Steel Carriage Bolts

Type 18-8 & 316 Stainless Steel

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