Carriage Bolts 18-8 Stainless Steel 5/16-18"

5/16"-18 Stainless Steel Carriage Bolt

Diameter - Thread Pitch: 5/16-18


  • Square section grips into the part being fixed (typically wood)
  • Carriage bolts are threaded all the way down to the square section beneath the head
  • Prevents the bolt from turning when the nut is tightened
  • 18-8 Stainless steel is corrosion and rust resistant
  • 18-8 Stainless steel is considered the fastener industry standard

5/16"-18 Carriage bolts have a domed or countersunk head, and the shank is topped by a short square section under the head.

All Carriage Bolts over 6" in length are Partially Threaded

Diameter x Thread Pitch x Length from Under Head
FT: Fully Threaded
PT: Partially Threaded


Select Products Below See Product Specifications

NA = "Not Sold In Single Quantity"

Size
Select Package Quantity
SubTotal
Carriage Bolt 18-8 SS 5/16"-18 x 5/8"
SKU #77002
Carriage Bolt 18-8 SS 5/16"-18 x 5/8"
SKU #77002
1
NA
25
$8.25 (0.33/ea)
100
$30.00 (0.3/ea)
1000
$290.00 (0.29/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 3/4"
SKU #77012
Carriage Bolt 18-8 SS 5/16"-18 x 3/4"
SKU #77012
1
NA
25
$8.75 (0.35/ea)
100
$33.00 (0.33/ea)
1000
$300.00 (0.3/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 1"
SKU #77022
Carriage Bolt 18-8 SS 5/16"-18 x 1"
SKU #77022
1
NA
25
$10.25 (0.41/ea)
100
$39.00 (0.39/ea)
1000
$370.00 (0.37/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 1-1/4"
SKU #77032
Carriage Bolt 18-8 SS 5/16"-18 x 1-1/4"
SKU #77032
1
NA
25
$12.50 (0.5/ea)
100
$48.00 (0.48/ea)
1000
$450.00 (0.45/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 1-1/2"
SKU #77042
Carriage Bolt 18-8 SS 5/16"-18 x 1-1/2"
SKU #77042
1
NA
25
$12.75 (0.51/ea)
100
$49.00 (0.49/ea)
1000
$470.00 (0.47/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 1-3/4"
SKU #77052
Carriage Bolt 18-8 SS 5/16"-18 x 1-3/4"
SKU #77052
1
$0.58 (0.58/ea)
25
$14.00 (0.56/ea)
100
$52.00 (0.52/ea)
1000
$510.00 (0.51/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 2"
SKU #77062
Carriage Bolt 18-8 SS 5/16"-18 x 2"
SKU #77062
1
$0.65 (0.65/ea)
25
$16.00 (0.64/ea)
100
$60.00 (0.6/ea)
1000
$590.00 (0.59/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 2-1/4"
SKU #77072
Carriage Bolt 18-8 SS 5/16"-18 x 2-1/4"
SKU #77072
1
$0.77 (0.77/ea)
25
$18.50 (0.74/ea)
100
$73.00 (0.73/ea)
1000
$700.00 (0.7/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 2-1/2"
SKU #77082
Carriage Bolt 18-8 SS 5/16"-18 x 2-1/2"
SKU #77082
1
$0.74 (0.74/ea)
25
$18.25 (0.73/ea)
100
$70.00 (0.7/ea)
1000
$680.00 (0.68/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 2-3/4"
SKU #77092
Carriage Bolt 18-8 SS 5/16"-18 x 2-3/4"
SKU #77092
1
$0.81 (0.81/ea)
25
$19.50 (0.78/ea)
100
$74.00 (0.74/ea)
1000
$720.00 (0.72/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 3"
SKU #77102
Carriage Bolt 18-8 SS 5/16"-18 x 3"
SKU #77102
1
$0.99 (0.99/ea)
25
$23.75 (0.95/ea)
100
$90.00 (0.9/ea)
1000
$890.00 (0.89/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 3-1/4"
SKU #77112
Carriage Bolt 18-8 SS 5/16"-18 x 3-1/4"
SKU #77112
1
$0.90 (0.9/ea)
25
$22.00 (0.88/ea)
100
$86.00 (0.86/ea)
1000
$850.00 (0.85/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 3-1/2"
SKU #77122
Carriage Bolt 18-8 SS 5/16"-18 x 3-1/2"
SKU #77122
1
$0.88 (0.88/ea)
25
$21.50 (0.86/ea)
100
$83.00 (0.83/ea)
1000
$810.00 (0.81/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 3-3/4"
SKU #77132
Carriage Bolt 18-8 SS 5/16"-18 x 3-3/4"
SKU #77132
1
$0.88 (0.88/ea)
25
$21.50 (0.86/ea)
100
$83.00 (0.83/ea)
1000
$810.00 (0.81/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 4"
SKU #77142
Carriage Bolt 18-8 SS 5/16"-18 x 4"
SKU #77142
1
$1.53 (1.53/ea)
25
$37.00 (1.48/ea)
100
$143.00 (1.43/ea)
1000
$1,400.00 (1.4/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 4-1/2"
SKU #77152
Carriage Bolt 18-8 SS 5/16"-18 x 4-1/2"
SKU #77152
1
$1.39 (1.39/ea)
25
$33.00 (1.32/ea)
100
$126.00 (1.26/ea)
1000
$1,250.00 (1.25/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 5"
SKU #77162
Carriage Bolt 18-8 SS 5/16"-18 x 5"
SKU #77162
1
$1.43 (1.43/ea)
25
$34.25 (1.37/ea)
100
$132.00 (1.32/ea)
1000
$1,300.00 (1.3/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 5-1/2"
SKU #77172
Carriage Bolt 18-8 SS 5/16"-18 x 5-1/2"
SKU #77172
1
$1.94 (1.94/ea)
25
$47.25 (1.89/ea)
100
$180.00 (1.8/ea)
1000
$1,770.00 (1.77/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 6"
SKU #77182
Carriage Bolt 18-8 SS 5/16"-18 x 6"
SKU #77182
1
$2.10 (2.1/ea)
25
$50.50 (2.02/ea)
100
$194.00 (1.94/ea)
1000
$1,910.00 (1.91/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 6-1/2"
SKU #77192
Carriage Bolt 18-8 SS 5/16"-18 x 6-1/2"
SKU #77192
1
$5.77 (5.77/ea)
25
$138.50 (5.54/ea)
100
$530.00 (5.3/ea)
1000
$5,290.00 (5.29/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 7"
SKU #77202
Carriage Bolt 18-8 SS 5/16"-18 x 7"
SKU #77202
1
$7.13 (7.13/ea)
25
$171.25 (6.85/ea)
100
$656.00 (6.56/ea)
1000
$6,540.00 (6.54/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 8"
SKU #77212
Carriage Bolt 18-8 SS 5/16"-18 x 8"
SKU #77212
1
$11.92 (11.92/ea)
25
$286.25 (11.45/ea)
100
$1,095.00 (10.95/ea)
1000
$10,930.00 (10.93/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 9"
SKU #77222
Carriage Bolt 18-8 SS 5/16"-18 x 9"
SKU #77222
1
$22.94 (22.94/ea)
25
$549.75 (21.99/ea)
100
$2,103.00 (21.03/ea)
1000
$21,020.00 (21.02/ea)
Subtotal: $0.00 /
Carriage Bolt 18-8 SS 5/16"-18 x 10"
SKU #77232
Carriage Bolt 18-8 SS 5/16"-18 x 10"
SKU #77232
1
$23.45 (23.45/ea)
25
$562.00 (22.48/ea)
100
$2,151.00 (21.51/ea)
1000
$21,500.00 (21.5/ea)
Subtotal: $0.00 /



FREQUENTLY USED WITH

1
NA
25
$2.00 (0.08/ea)
100
$6.00 (0.06/ea)
1000
$40.00 (0.04/ea)
Subtotal: $0.00 /
1
NA
25
$2.75 (0.11/ea)
100
$7.00 (0.07/ea)
1000
$60.00 (0.06/ea)
Subtotal: $0.00 /

Product Specifications
Color
Silver
Corner Radius on Square
0.031
Corrosion Resistant
Yes
Filet Radius
0.031
Grade
18-8
Head Diameter
Max 0.719 - Min 0.688
Head Height Max
0.176
Head Style
Dome
Material
Stainless Steel
Overall Head Height
Max 0.176 - Min 0.156
Product Type
Carriage Bolt
Square Neck Depth
Max 0.187 - Min 0.156
Square Neck Width
Max 0.324 - Min 0.307
System of Measurement (Unit)
Inch
Thread Direction
Right Hand
Thread Pitch (Count)
18 Per Inch
Thread Standard
UNC
Thread Type
Coarse
Tolerance (IFI)
Actual measurements may vary slightly +/- depending on production run within IFI Tolerances