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

5/16"-18 Stainless Steel Carriage Bolts

Diameter - Thread Pitch: 5/16-18


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

  • 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


Select Products Below
Product Specifications
Body Diameter
5/16" (Max 0.3113 - Min 0.3026)
Color
Silver
Corner Radius on Square
0.031
Corrosion Resistant
Yes
Filet Radius
0.031
Head Diameter
Max 0.719 - Min 0.688
Head Height Max
0.176
Head Style
Domed
Material
18-8 Stainless Steel
Product Type
Carriage Bolt
Thread Direction
Right Hand
Thread Pitch (Count)
18
Thread Standard
UNC
Thread Type
Coarse
Tolerance (IFI)
Actual measurements may vary slightly +/- depending on production run within IFI Tolerances
Select Products Below
Qty
Size
Select Package Quantity
SubTotal
5/16"-18 x 5/8"
SKU #77002
5/16"-18 x 5/8"
SKU #77002
1
$0.21 (0.21/ea)
25
$4.75 (0.19/ea)
100
$17.00 (0.17/ea)
1000
$140.00 (0.14/ea)
 
5/16"-18 x 3/4"
SKU #77012
5/16"-18 x 3/4"
SKU #77012
1
$0.25 (0.25/ea)
25
$5.75 (0.23/ea)
100
$21.00 (0.21/ea)
1000
$170.00 (0.17/ea)
 
5/16"-18 x 1"
SKU #77022
5/16"-18 x 1"
SKU #77022
1
$0.30 (0.30/ea)
25
$6.75 (0.27/ea)
100
$25.00 (0.25/ea)
1000
$200.00 (0.20/ea)
 
5/16"-18 x 1-1/4"
SKU #77032
5/16"-18 x 1-1/4"
SKU #77032
1
$0.33 (0.33/ea)
25
$7.75 (0.31/ea)
100
$28.00 (0.28/ea)
1000
$220.00 (0.22/ea)
 
5/16"-18 x 1-1/2"
SKU #77042
5/16"-18 x 1-1/2"
SKU #77042
1
$0.39 (0.39/ea)
25
$9.00 (0.36/ea)
100
$32.00 (0.32/ea)
1000
$260.00 (0.26/ea)
 
5/16"-18 x 1-3/4"
SKU #77052
5/16"-18 x 1-3/4"
SKU #77052
1
$0.42 (0.42/ea)
25
$9.75 (0.39/ea)
100
$35.00 (0.35/ea)
1000
$280.00 (0.28/ea)
 
5/16"-18 x 2"
SKU #77062
5/16"-18 x 2"
SKU #77062
1
$0.48 (0.48/ea)
25
$11.00 (0.44/ea)
100
$40.00 (0.40/ea)
1000
$320.00 (0.32/ea)
 
5/16"-18 x 2-1/4"
SKU #77072
5/16"-18 x 2-1/4"
SKU #77072
1
$0.50 (0.50/ea)
25
$11.25 (0.45/ea)
100
$41.00 (0.41/ea)
1000
$330.00 (0.33/ea)
 
5/16"-18 x 2-1/2"
SKU #77082
5/16"-18 x 2-1/2"
SKU #77082
1
$0.55 (0.55/ea)
25
$12.75 (0.51/ea)
100
$46.00 (0.46/ea)
1000
$370.00 (0.37/ea)
 
5/16"-18 x 2-3/4"
SKU #77092
5/16"-18 x 2-3/4"
SKU #77092
1
$0.60 (0.60/ea)
25
$13.75 (0.55/ea)
100
$50.00 (0.50/ea)
1000
$400.00 (0.40/ea)
 
5/16"-18 x 3"
SKU #77102
5/16"-18 x 3"
SKU #77102
1
$0.63 (0.63/ea)
25
$14.50 (0.58/ea)
100
$53.00 (0.53/ea)
1000
$420.00 (0.42/ea)
 
5/16"-18 x 3-1/4"
SKU #77112
5/16"-18 x 3-1/4"
SKU #77112
1
$0.67 (0.67/ea)
25
$15.50 (0.62/ea)
100
$56.00 (0.56/ea)
1000
$450.00 (0.45/ea)
 
5/16"-18 x 3-1/2"
SKU #77122
5/16"-18 x 3-1/2"
SKU #77122
1
$0.66 (0.66/ea)
25
$15.25 (0.61/ea)
100
$55.00 (0.55/ea)
1000
$440.00 (0.44/ea)
 
5/16"-18 x 3-3/4"
SKU #77132
5/16"-18 x 3-3/4"
SKU #77132
1
$0.66 (0.66/ea)
25
$15.25 (0.61/ea)
100
$55.00 (0.55/ea)
1000
$440.00 (0.44/ea)
 
5/16"-18 x 4"
SKU #77142
5/16"-18 x 4"
SKU #77142
1
$0.99 (0.99/ea)
25
$22.75 (0.91/ea)
100
$83.00 (0.83/ea)
1000
$660.00 (0.66/ea)
 
5/16"-18 x 4-1/2"
SKU #77152
5/16"-18 x 4-1/2"
SKU #77152
1
$1.02 (1.02/ea)
25
$23.50 (0.94/ea)
100
$85.00 (0.85/ea)
1000
$680.00 (0.68/ea)
 
5/16"-18 x 5"
SKU #77162
5/16"-18 x 5"
SKU #77162
1
$1.06 (1.06/ea)
25
$24.25 (0.97/ea)
100
$88.00 (0.88/ea)
1000
$700.00 (0.70/ea)
 
5/16"-18 x 5-1/2"
SKU #77172
5/16"-18 x 5-1/2"
SKU #77172
1
$1.25 (1.25/ea)
25
$28.75 (1.15/ea)
100
$105.00 (1.05/ea)
1000
$840.00 (0.84/ea)
 
5/16"-18 x 6"
SKU #77182
5/16"-18 x 6"
SKU #77182
1
$1.35 (1.35/ea)
25
$31.00 (1.24/ea)
100
$113.00 (1.13/ea)
1000
$900.00 (0.90/ea)
 
5/16"-18 x 6-1/2"
SKU #77192
5/16"-18 x 6-1/2"
SKU #77192
1
$4.29 (4.29/ea)
25
$98.25 (3.93/ea)
100
$358.00 (3.58/ea)
1000
$2,860.00 (2.86/ea)
 
5/16"-18 x 7"
SKU #77202
5/16"-18 x 7"
SKU #77202
1
$4.62 (4.62/ea)
25
$106.00 (4.24/ea)
100
$385.00 (3.85/ea)
1000
$3,080.00 (3.08/ea)
 
5/16"-18 x 8"
SKU #77212
5/16"-18 x 8"
SKU #77212
1
$7.72 (7.72/ea)
25
$177.00 (7.08/ea)
100
$644.00 (6.44/ea)
1000
$5,150.00 (5.15/ea)
 
5/16"-18 x 9"
SKU #77222
5/16"-18 x 9"
SKU #77222
1
$14.85 (14.85/ea)
25
$340.25 (13.61/ea)
100
$1,238.00 (12.38/ea)
1000
$9,900.00 (9.90/ea)
 
5/16"-18 x 10"
SKU #77232
5/16"-18 x 10"
SKU #77232
1
$15.18 (15.18/ea)
25
$348.00 (13.92/ea)
100
$1,265.00 (12.65/ea)
1000
$10,120.00 (10.12/ea)