Hex Cap Screws Hot Dipped Galvanized 307A Grade A 5/16-18"

5/16"-18 Hot Dip Galvanized Hex Cap Screws

Diameter - Thread Pitch: 5/16" - 18


  • 5/16"-18
  • Hexagon head designed to be driven by a wrench or socket
  • Also called hex cap bolts, hex bolts, tap bolts or hex cap screws
  • Hot dipped galvanized finish offers corrosion resistance due to the molten zinc bath finishing process
  • Creates a bonded alloy coating
  • Due to the finishing process for Hot Dip Galvanized fasteners, it is recommended to only use Hot Dip Galvanized fasteners with Hot Dip Galvanized fasteners and not mix metals. This can create threading and durability issues.

A hex cap screw in smaller sizes may not have a shoulder. When a hex cap screw is fully threaded it can also be referred to as a tap bolt.

A Hex Bolt is measured as: Diameter x Thread Pitch x Length from Under Head
FT: Fully Threaded
PT: Partially Threaded


**5/16"-18 Hex Cap Screws listed as PT, usually have a threaded portion of about 7/8".
However, this can vary slightly from manufacturer to manufacturer.

Select Products Below See Product Specifications

NA = "Not Sold In Single Quantity"

Size
Select Package Quantity
SubTotal
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 1/2" FT
SKU #1070-032-0002
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 1/2" FT
SKU #1070-032-0002
1
NA
25
$5.00 (0.2/ea)
100
$13.00 (0.13/ea)
1000
$110.00 (0.11/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 1" FT
SKU #1070-032-0022
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 1" FT
SKU #1070-032-0022
1
NA
25
$5.50 (0.22/ea)
100
$17.00 (0.17/ea)
1000
$140.00 (0.14/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 1-1/4" FT
SKU #1070-032-0032
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 1-1/4" FT
SKU #1070-032-0032
1
NA
25
$6.25 (0.25/ea)
100
$19.00 (0.19/ea)
1000
$160.00 (0.16/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 1-1/2" PT
SKU #1070-032-0042
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 1-1/2" PT
SKU #1070-032-0042
1
NA
25
$6.75 (0.27/ea)
100
$20.00 (0.2/ea)
1000
$170.00 (0.17/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 1-3/4" PT
SKU #1070-032-0052
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 1-3/4" PT
SKU #1070-032-0052
1
NA
25
$7.50 (0.3/ea)
100
$22.00 (0.22/ea)
1000
$190.00 (0.19/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 2" PT
SKU #1070-032-0062
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 2" PT
SKU #1070-032-0062
1
NA
25
$8.25 (0.33/ea)
100
$24.00 (0.24/ea)
1000
$200.00 (0.2/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 2-1/4" PT
SKU #1070-032-0072
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 2-1/4" PT
SKU #1070-032-0072
1
NA
25
$9.00 (0.36/ea)
100
$29.00 (0.29/ea)
1000
$270.00 (0.27/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 2-1/2" PT
SKU #1070-032-0082
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 2-1/2" PT
SKU #1070-032-0082
1
NA
25
$9.50 (0.38/ea)
100
$29.00 (0.29/ea)
1000
$240.00 (0.24/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 3" PT
SKU #1070-032-0092
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 3" PT
SKU #1070-032-0092
1
NA
25
$11.00 (0.44/ea)
100
$33.00 (0.33/ea)
1000
$280.00 (0.28/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 3-1/4" PT
SKU #1070-032-0102
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 3-1/4" PT
SKU #1070-032-0102
1
NA
25
$12.00 (0.48/ea)
100
$38.00 (0.38/ea)
1000
$360.00 (0.36/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 3-1/2" PT
SKU #1070-032-0112
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 3-1/2" PT
SKU #1070-032-0112
1
NA
25
$12.50 (0.5/ea)
100
$41.00 (0.41/ea)
1000
$350.00 (0.35/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 4" PT
SKU #1070-032-0122
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 4" PT
SKU #1070-032-0122
1
NA
25
$13.25 (0.53/ea)
100
$46.00 (0.46/ea)
1000
$390.00 (0.39/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 4-1/2" PT
SKU #1070-032-0132
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 4-1/2" PT
SKU #1070-032-0132
1
NA
25
$14.75 (0.59/ea)
100
$55.00 (0.55/ea)
1000
$470.00 (0.47/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 5" PT
SKU #1070-032-0142
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 5" PT
SKU #1070-032-0142
1
NA
25
$16.75 (0.67/ea)
100
$59.00 (0.59/ea)
1000
$500.00 (0.5/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 5-1/2" PT
SKU #1070-032-0152
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 5-1/2" PT
SKU #1070-032-0152
1
NA
25
$17.00 (0.68/ea)
100
$62.00 (0.62/ea)
1000
$530.00 (0.53/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 6" PT
SKU #1070-032-0162
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 6" PT
SKU #1070-032-0162
1
$0.86 (0.86/ea)
25
$19.25 (0.77/ea)
100
$67.00 (0.67/ea)
1000
$560.00 (0.56/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 6-1/2" PT
SKU #1070-032-0172
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 6-1/2" PT
SKU #1070-032-0172
1
$0.88 (0.88/ea)
25
$21.50 (0.86/ea)
100
$77.00 (0.77/ea)
1000
$740.00 (0.74/ea)
Subtotal: $0.00 /
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 7" PT
SKU #1070-032-0182
Hex Cap Screws HDG 307A Grade A -5/16"-18 x 7" PT
SKU #1070-032-0182
1
$1.12 (1.12/ea)
25
$22.00 (0.88/ea)
100
$82.00 (0.82/ea)
1000
$690.00 (0.69/ea)
Subtotal: $0.00 /

Frequently Used With

1
NA
25
$4.25 (0.17/ea)
100
$10.00 (0.1/ea)
1000
$80.00 (0.08/ea)
Subtotal: $0.00 /
1
NA
25
$4.00 (0.16/ea)
100
$8.00 (0.08/ea)
1000
$60.00 (0.06/ea)
Subtotal: $0.00 /

Product Specifications
Corrosion Resistant
Yes
Drive Style
External Hex
Finish
Hot Dip Galvanized
Grade
307A Grade A
Head Height
Basic 13/16", Max 0.211 - Min 0.195
Head Style
Hex
Material
Steel
Product Type
Hex Cap Screws
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
Width Across Corners
Max 0.577 - Min 0.571
Wrench Size
1/2"