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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
 $0.35 (0.35/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
 $0.31 (0.31/ea)
100
 $23.00 (0.23/ea)
1000
 $210.00 (0.21/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
 $0.34 (0.34/ea)
100
 $25.00 (0.25/ea)
1000
 $220.00 (0.22/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
 $0.40 (0.4/ea)
100
 $29.00 (0.29/ea)
1000
 $260.00 (0.26/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
 $0.42 (0.42/ea)
100
 $30.00 (0.3/ea)
1000
 $270.00 (0.27/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
 $0.46 (0.46/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 2"
SKU #77062
Carriage Bolt 18-8 SS 5/16"-18 x 2"
SKU #77062
1
 $0.50 (0.5/ea)
100
 $36.00 (0.36/ea)
1000
 $320.00 (0.32/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
 $0.55 (0.55/ea)
100
 $39.00 (0.39/ea)
1000
 $350.00 (0.35/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
 $0.60 (0.6/ea)
100
 $44.00 (0.44/ea)
1000
 $390.00 (0.39/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
 $0.64 (0.64/ea)
100
 $50.00 (0.5/ea)
1000
 $450.00 (0.45/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
 $0.66 (0.66/ea)
100
 $48.00 (0.48/ea)
1000
 $430.00 (0.43/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
 $0.70 (0.7/ea)
100
 $55.00 (0.55/ea)
1000
 $500.00 (0.5/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
 $0.80 (0.8/ea)
100
 $58.00 (0.58/ea)
1000
 $510.00 (0.51/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)
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
 $1.00 (1/ea)
100
 $70.00 (0.7/ea)
1000
 $650.00 (0.65/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
 $1.10 (1.1/ea)
100
 $79.00 (0.79/ea)
1000
 $700.00 (0.7/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
 $1.27 (1.27/ea)
100
 $91.00 (0.91/ea)
1000
 $820.00 (0.82/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
 $1.35 (1.35/ea)
100
 $97.00 (0.97/ea)
1000
 $870.00 (0.87/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
 $1.78 (1.78/ea)
100
 $127.00 (1.27/ea)
1000
 $1,150.00 (1.15/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
 $7.69 (7.69/ea)
100
 $549.00 (5.49/ea)
1000
 $4,940.00 (4.94/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
 $5.05 (5.05/ea)
100
 $360.00 (3.6/ea)
1000
 $3,250.00 (3.25/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
 $6.32 (6.32/ea)
100
 $451.00 (4.51/ea)
1000
 $4,070.00 (4.07/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
 $13.20 (13.2/ea)
100
 $943.00 (9.43/ea)
1000
 $8,490.00 (8.49/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
 $13.72 (13.72/ea)
100
 $981.00 (9.81/ea)
1000
 $8,820.00 (8.82/ea)
Subtotal: $0.00 /



FREQUENTLY USED WITH

Flat Washers 304 SS - 5/16" (.343 ID x 3/4 OD x .050 Thick)
Flat Washers 304 SS - 5/16" (.343 ID x 3/4 OD x .050 Thick) 1000-105152
Flat Washers 304 SS - 5/16
1
 $0.09 (0.09/ea)
100
 $5.00 (0.05/ea)
1000
 $40.00 (0.04/ea)
Subtotal: $0.00 /
Hex Finish Nuts 304 SS - 5/16"-18 (1/2" Flats x 17/64" Thick)
Hex Finish Nuts 304 SS - 5/16"-18 (1/2" Flats x 17/64" Thick) 123022
Hex Finish Nuts 304 SS - 5/16
1
 $0.11 (0.11/ea)
100
 $8.00 (0.08/ea)
1000
 $60.00 (0.06/ea)
Subtotal: $0.00 /
MRO Solution 2400 - Marine Grade Anti-Seize Lubricant - 8 oz.
MRO Solution 2400 - Marine Grade Anti-Seize Lubricant - 8 oz. 1050-106
MRO Solution 2400 - Marine Grade Anti-Seize Lubricant - 8 oz.
Anti Seize MRO Solution 2400 - 8oz
Prevent Fastener Galling & Locking Up with Anti-Seize Lubricants

Our Price: $18.11
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

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