Hex Cap Screws 316 Stainless Steel 5/16-18"

5/16"-18 | 316 Stainless Steel 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
  • 316 Stainless Steel Hex Cap Screws are suitable for saltwater, marine and hash environment installations
  • Commonly used for:
    • Boats
    • Docks
    • Piers
    • Other harsh environments

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.

Hex Bolts are 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 316 Stainless Steel - 5/16-18 x 1/2 Full Thread
SKU #640012
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 1/2 Full Thread
SKU #640012
1
NA
25
$10.00 (0.4/ea)
100
$25.00 (0.25/ea)
1000
$190.00 (0.19/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 5/8 Full Thread
SKU #640022
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 5/8 Full Thread
SKU #640022
1
NA
25
$10.75 (0.43/ea)
100
$28.00 (0.28/ea)
1000
$210.00 (0.21/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 3/4 Full Thread
SKU #640032
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 3/4 Full Thread
SKU #640032
1
NA
25
$11.25 (0.45/ea)
100
$33.00 (0.33/ea)
1000
$240.00 (0.24/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 7/8 Full Thread
SKU #640042
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 7/8 Full Thread
SKU #640042
1
NA
25
$12.25 (0.49/ea)
100
$40.00 (0.4/ea)
1000
$290.00 (0.29/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 1 Full Thread
SKU #640052
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 1 Full Thread
SKU #640052
1
NA
25
$13.00 (0.52/ea)
100
$41.00 (0.41/ea)
1000
$300.00 (0.3/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 1-1/4 Full Thread
SKU #640072
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 1-1/4 Full Thread
SKU #640072
1
NA
25
$14.00 (0.56/ea)
100
$45.00 (0.45/ea)
1000
$330.00 (0.33/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 1-3/8 Partial Thread
SKU #640082
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 1-3/8 Partial Thread
SKU #640082
1
NA
25
$15.50 (0.62/ea)
100
$50.00 (0.5/ea)
1000
$360.00 (0.36/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 1-1/2 Partial Thread
SKU #640092
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 1-1/2 Partial Thread
SKU #640092
1
NA
25
$16.00 (0.64/ea)
100
$51.00 (0.51/ea)
1000
$370.00 (0.37/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 1-3/4 Partial Thread
SKU #640102
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 1-3/4 Partial Thread
SKU #640102
1
$0.77 (0.77/ea)
25
$17.25 (0.69/ea)
100
$56.00 (0.56/ea)
1000
$410.00 (0.41/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 2 Partial Thread
SKU #640112
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 2 Partial Thread
SKU #640112
1
$0.88 (0.88/ea)
25
$19.75 (0.79/ea)
100
$66.00 (0.66/ea)
1000
$480.00 (0.48/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 2-1/4 Partial Thread
SKU #640122
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 2-1/4 Partial Thread
SKU #640122
1
$0.91 (0.91/ea)
25
$20.25 (0.81/ea)
100
$69.00 (0.69/ea)
1000
$490.00 (0.49/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 2-1/2 Partial Thread
SKU #640132
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 2-1/2 Partial Thread
SKU #640132
1
$0.98 (0.98/ea)
25
$22.00 (0.88/ea)
100
$73.00 (0.73/ea)
1000
$520.00 (0.52/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 2-3/4 Partial Thread
SKU #640142
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 2-3/4 Partial Thread
SKU #640142
1
$1.05 (1.05/ea)
25
$23.50 (0.94/ea)
100
$81.00 (0.81/ea)
1000
$570.00 (0.57/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 3 Partial Thread
SKU #640152
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 3 Partial Thread
SKU #640152
1
$1.12 (1.12/ea)
25
$25.00 (1/ea)
100
$86.00 (0.86/ea)
1000
$610.00 (0.61/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 3-1/4 Partial Thread
SKU #640162
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 3-1/4 Partial Thread
SKU #640162
1
$1.35 (1.35/ea)
25
$30.25 (1.21/ea)
100
$106.00 (1.06/ea)
1000
$760.00 (0.76/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 3-1/2 Partial Thread
SKU #640172
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 3-1/2 Partial Thread
SKU #640172
1
$1.42 (1.42/ea)
25
$31.75 (1.27/ea)
100
$109.00 (1.09/ea)
1000
$770.00 (0.77/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 3-3/4 Partial Thread
SKU #640182
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 3-3/4 Partial Thread
SKU #640182
1
$2.32 (2.32/ea)
25
$52.00 (2.08/ea)
100
$134.00 (1.34/ea)
1000
$1,280.00 (1.28/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 4 Partial Thread
SKU #640192
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 4 Partial Thread
SKU #640192
1
$1.52 (1.52/ea)
25
$34.00 (1.36/ea)
100
$89.00 (0.89/ea)
1000
$850.00 (0.85/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 4-1/2 Partial Thread
SKU #640212
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 4-1/2 Partial Thread
SKU #640212
1
$2.00 (2/ea)
25
$45.00 (1.8/ea)
100
$118.00 (1.18/ea)
1000
$1,120.00 (1.12/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 5 Partial Thread
SKU #640222
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 5 Partial Thread
SKU #640222
1
$2.06 (2.06/ea)
25
$46.25 (1.85/ea)
100
$121.00 (1.21/ea)
1000
$1,150.00 (1.15/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 5-1/2 Partial Thread
SKU #640232
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 5-1/2 Partial Thread
SKU #640232
1
$2.44 (2.44/ea)
25
$54.75 (2.19/ea)
100
$134.00 (1.34/ea)
1000
$1,280.00 (1.28/ea)
Subtotal: $0.00 /
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 6 Partial Thread
SKU #640242
Hex Cap Screws 316 Stainless Steel - 5/16-18 x 6 Partial Thread
SKU #640242
1
$2.50 (2.5/ea)
25
$56.25 (2.25/ea)
100
$141.00 (1.41/ea)
1000
$1,340.00 (1.34/ea)
Subtotal: $0.00 /



FREQUENTLY USED WITH

1
NA
25
$3.50 (0.14/ea)
100
$10.00 (0.1/ea)
1000
$80.00 (0.08/ea)
Subtotal: $0.00 /

Product Specifications
Color
Silver
Corrosion Resistant
Yes
Diameter
5/16"
Drive Style
External Hex
Grade
316
Head Height Max
0.211
Head Style
Hex
Marine Grade
Yes
Material
Stainless Steel
Overall Head Height
Basic 13/16", Max 0.211 - Min 0.195
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 0.577
Wrench Size
1/2"