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1/2"-13 Carriage Bolts

1/2"-13 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
  • 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?
1/2" Nuts
5/8" Washers

1/4" 18-8SS & 316SS | 5/16" 18-8SS & 316SS
3/8" 18-8SS & 316SS | 1/2" 18-8SS & 316SS
1/2"-13
18-8 Stainless Steel
  • Length
  • 1"
  • 1+    $0.64/each
    100+    $0.58/each
  • 1-1/4"
  • 1+    $0.76/each
    100+    $0.69/each
  • 1-1/2"
  • 1+    $0.82/each
    100+    $0.74/each
  • 1-3/4"
  • 1+    $0.88/each
    100+    $0.80/each
  • 2"
  • 1+    $0.95/each
    100+    $0.86/each
  • 2-1/2"
  • 1+    $1.10/each
    100+    $0.99/each
  • 3"
  • 1+    $1.35/each
    100+    $1.22/each
  • 3-1/2"
  • 1+    $1.51/each
    100+    $1.36/each
  • 4"
  • 1+    $1.70/ea
    100+    $1.53/ea
  • 4-1/2"
  • 1+    $1.88/each
    100+    $1.69/each
  • 5"
  • 1+    $1.98/each
    100+    $1.78/each
  • 5-1/2"
  • 1+    $2.19/each
    100+    $1.97/each
  • 6"
  • 1+    $3.05/each
    100+    $2.74/each
  • 7"
  • 1+    $4.31/each
    100+    $3.88/each
  • 7-1/2"
  • 1+    $6.50/each
    50+    $5.85/each
  • 8
  • 1+    $6.60/each
    50+    $5.94/each
  • 8-1/2"
  • 1+    $8.25/each
    50+    $7.42/each
  • 9"
  • 1+    $9.99/each
    50+    $8.99/each
  • 9-1/2"
  • 1+  $10.25/each
    25+    $9.22/each
  • 10"
  • 1+  $10.34/each
    25+    $9.31/each
  • 11"
  • 1+  $12.08/each
    25+  $10.87/each
  • 12"
  • 1+  $12.25/each
    25+  $11.02/each
  • 14"
  • 1+  $13.10/each
    25+  $11.79/each
  • 16"
  • 1+  $18.33/each
    25+  $16.50/each
  • 18"
  • 1+  $19.00/each
    25+  $17.10/each
1/2"-13
316 Stainless Steel
  • Length
  • 1"
  • 1+    $3.69/each
    100+    $3.33/each
  • 1-1/2"
  • 1+    $3.98/each
    100+    $3.58/each
  • 2"
  • 1+    $4.05/each
    100+    $3.64/each
  • 2-1/2"
  • 1+    $4.21/each
    100+    $3.80/each
  • 3"
  • 1+    $4.71/each
    100+    $4.25/each
  • 3-1/2"
  • 1+    $4.98/each
    100+    $4.48/each
  • 4"
  • 1+    $5.17/each
    50+    $4.65/each
  • 4-1/2"
  • 1+    $5.71/each
    50+    $5.15/each
  • 5"
  • 1+    $6.40/each
    50+    $5.77/each
  • 6"
  • 1+    $6.83/each
    50+    $6.15/each
  • 7"
  • 1+    $8.80/each
    50+    $7.92/each
  • 8
  • 1+    $8.94/each
    50+    $8.05/each
  • 9"
  • 1+  $10.70/each
    25+    $9.63/each
  • 10"
  • 1+  $12.72/each
    25+  $11.45/each
Carriage Bolts have a square shoulder under a round head and are used with a nut and washer. Washer needs to be 1 size up from the bolt diameter to fit over the neck and sit flat under the head.

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

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