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Hex Cap Screws, Stainless Steel 18-8, 5/16"-18 x 1-3/8", Partial Thread

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
  • 18-8 Stainless steel hex cap screws offer protection from weather and corrosive environments
  • Rust resistant in freshwater environments
  • For saltwater environments use the 316 stainless steel version

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.

Product number: 87082
Print this page
Click on a size/sku in the table to view product-specific details and specifications.
FT = Full Thread (threaded the entire length)  ·  PT = Partial Thread (unthreaded shoulder below the head)

Specifications

  • Across Flats (Width): 1/2" (Max 0.500 - Min 0.489)
  • asme: B18.2.1
  • Color: Silver
  • Condition: New
  • Corrosion Resistant: Yes
  • Diameter: 5/16"
  • Drive Style: External Hex
  • Head Type: Hex Head
  • Thread Direction: Right Hand
  • Thread Type: Coarse
  • Fit: 2A
  • FT = Full Thread: No
  • Grade: 18-8
  • Head Height: Basic 13/16", Max 0.211 - Min 0.195
  • Head Height Basic: 13/64"
  • Head Height Max: 0.211
  • Head Style: Hex
  • Length: 1-3/8"
  • Material: Stainless Steel
  • Overall Head Height: 0.195" - 0.211"
  • Part Number: 710500914218
  • Product Type: Hex Cap Screws
  • Size System: US
  • Size Type: Regular
  • Standards Met: ASME B18.2.1
  • System of Measurement: Inch
  • Thread Direction: Right Hand
  • Thread Pitch: 18 Per Inch
  • Thread Size: 5/16"-18
  • Thread Standard: UNC
  • Thread Type: Coarse
  • Tolerance (IFI): Actual measurements may vary slightly +/- depending on production run within IFI Tolerances
  • Weight: 1 lb
  • Width Across Corners: 0.577
  • Wrench Size: 1/2"

Frequently Used With

Flat Washers, Stainless Steel 304, 5/16" (.343 ID x 3/4 OD x .050 Thick) Flat Washers, Stainless Steel 304, 5/16" (.343 ID x 3/4 OD x .050 Thick)
SKU: 1000-105152
Volume Pricing*
1
$0.09
($0.09/ea)
100
$5.00
($0.05/ea)
1000
$40.00
($0.04/ea)
$0.00
Hex Finish Nuts, Stainless Steel 304, 5/16"-18 (1/2" Flats x 17/64" Thick) Hex Finish Nuts, Stainless Steel 304, 5/16"-18 (1/2" Flats x 17/64" Thick)
SKU: 123022
Volume Pricing*
1
$0.11
($0.11/ea)
100
$8.00
($0.08/ea)
1000
$60.00
($0.06/ea)
$0.00
Fender Washers, Stainless Steel 18-8, 5/16 x 1-1/4" (.343 ID x 1-1/4 OD x .050 Thick) Fender Washers, Stainless Steel 18-8, 5/16 x 1-1/4" (.343 ID x 1-1/4 OD x .050 Thick)
SKU: 106122
Volume Pricing*
1
$0.11
($0.11/ea)
100
$10.00
($0.10/ea)
1000
$80.00
($0.08/ea)
$0.00
Fender Washers, Hot Dipped Galvanized Steel, 5/16 x 1-1/4" (.343 ID x 1-1/4 OD x .050 Thick) Fender Washers, Hot Dipped Galvanized Steel, 5/16 x 1-1/4" (.343 ID x 1-1/4 OD x .050 Thick)
SKU: FWHDG3516114
Volume Pricing*
1
$0.18
($0.18/ea)
100
$13.00
($0.13/ea)
1000
$100.00
($0.10/ea)
$0.00
Lock Washers, Split Ring, Stainless Steel 304, 5/16" (.314 ID x .583 OD x .078 Thick) Lock Washers, Split Ring, Stainless Steel 304, 5/16" (.314 ID x .583 OD x .078 Thick)
SKU: 108112
Volume Pricing*
1
$0.11
($0.11/ea)
100
$6.00
($0.06/ea)
1000
$50.00
($0.05/ea)
$0.00
Nylon Lock Nuts, Stainless Steel 304, 5/16-18 (.502 Flats x .359 Height) Nylon Lock Nuts, Stainless Steel 304, 5/16-18 (.502 Flats x .359 Height)
SKU: 128112
Volume Pricing*
1
$0.22
($0.22/ea)
100
$16.00
($0.16/ea)
1000
$140.00
($0.14/ea)
$0.00
MRO Solution 2400, Marine Grade Anti-Seize Lubricant, 8 oz. MRO Solution 2400, Marine Grade Anti-Seize Lubricant, 8 oz.
SKU: 1050-106
Volume Pricing*
$20.03 ea.
$0.00
Select Size/SKU & Quantity
32 Available Sizes
SIZE/SKU Review Volume Pricing* Enter Any Qty
5/16"-18 x 3/8" FT
87002
1
$0.48 ($0.48/ea)
100
$34.00 ($0.34/ea)
1000
$310.00 ($0.31/ea)
$0.00
5/16"-18 x 1/2" FT
87012
1
$0.26 ($0.26/ea)
100
$20.00 ($0.20/ea)
1000
$170.00 ($0.17/ea)
$0.00
5/16"-18 x 5/8" FT
87022
1
$0.28 ($0.28/ea)
100
$23.00 ($0.23/ea)
1000
$200.00 ($0.20/ea)
$0.00
5/16"-18 x 3/4" FT
87032
1
$0.28 ($0.28/ea)
100
$23.00 ($0.23/ea)
1000
$200.00 ($0.20/ea)
$0.00
5/16"-18 x 7/8" FT
87042
1
$0.31 ($0.31/ea)
100
$26.00 ($0.26/ea)
1000
$220.00 ($0.22/ea)
$0.00
5/16"-18 x 1" FT
87052
1
$0.32 ($0.32/ea)
100
$27.00 ($0.27/ea)
1000
$230.00 ($0.23/ea)
$0.00
5/16"-18 x 1-1/8" FT
87062
1
$0.32 ($0.32/ea)
100
$28.00 ($0.28/ea)
1000
$240.00 ($0.24/ea)
$0.00
5/16"-18 x 1-1/4" FT
87072
1
$0.35 ($0.35/ea)
100
$29.00 ($0.29/ea)
1000
$250.00 ($0.25/ea)
$0.00
5/16"-18 x 1-3/8" PT
87082
1
$0.66 ($0.66/ea)
100
$49.00 ($0.49/ea)
1000
$440.00 ($0.44/ea)
$0.00
5/16"-18 x 1-1/2" PT
87092
1
$0.41 ($0.41/ea)
100
$34.00 ($0.34/ea)
1000
$290.00 ($0.29/ea)
$0.00
5/16"-18 x 1-3/4" PT
87102
1
$0.43 ($0.43/ea)
100
$41.00 ($0.41/ea)
1000
$350.00 ($0.35/ea)
$0.00
5/16"-18 x 2" PT
87112
1
$0.43 ($0.43/ea)
100
$41.00 ($0.41/ea)
1000
$350.00 ($0.35/ea)
$0.00
5/16"-18 x 2-1/4" PT
87122
1
$0.55 ($0.55/ea)
100
$46.00 ($0.46/ea)
1000
$420.00 ($0.42/ea)
$0.00
5/16"-18 x 2-1/2" PT
87132
1
$0.61 ($0.61/ea)
100
$48.00 ($0.48/ea)
1000
$410.00 ($0.41/ea)
$0.00
5/16"-18 x 2-3/4" PT
87142
1
$0.65 ($0.65/ea)
100
$55.00 ($0.55/ea)
1000
$480.00 ($0.48/ea)
$0.00
5/16"-18 x 3" PT
87152
1
$0.72 ($0.72/ea)
100
$58.00 ($0.58/ea)
1000
$490.00 ($0.49/ea)
$0.00
5/16"-18 x 3-1/4" PT
87162
1
$0.80 ($0.80/ea)
100
$67.00 ($0.67/ea)
1000
$550.00 ($0.55/ea)
$0.00
5/16"-18 x 3-1/2" PT
87172
1
$0.87 ($0.87/ea)
100
$71.00 ($0.71/ea)
1000
$600.00 ($0.60/ea)
$0.00
5/16"-18 x 3-3/4" PT
87182
1
$1.26 ($1.26/ea)
100
$106.00 ($1.06/ea)
1000
$940.00 ($0.94/ea)
$0.00
5/16"-18 x 4" PT
87192
1
$1.04 ($1.04/ea)
100
$88.00 ($0.88/ea)
1000
$740.00 ($0.74/ea)
$0.00
5/16"-18 x 4-1/4" PT
87202
1
$0.90 ($0.90/ea)
100
$83.00 ($0.83/ea)
1000
$750.00 ($0.75/ea)
$0.00
5/16"-18 x 4-1/2" PT
87212
1
$1.16 ($1.16/ea)
100
$101.00 ($1.01/ea)
1000
$850.00 ($0.85/ea)
$0.00
5/16"-18 x 4-3/4" PT
87222
1
$1.26 ($1.26/ea)
100
$118.00 ($1.18/ea)
1000
$1,170.00 ($1.17/ea)
$0.00
5/16"-18 x 5" PT
87232
1
$1.76 ($1.76/ea)
100
$144.00 ($1.44/ea)
1000
$1,220.00 ($1.22/ea)
$0.00
5/16"-18 x 5-1/2" PT
87242
1
$1.47 ($1.47/ea)
100
$129.00 ($1.29/ea)
1000
$1,150.00 ($1.15/ea)
$0.00
5/16"-18 x 6" PT
87252
1
$1.83 ($1.83/ea)
100
$130.00 ($1.30/ea)
1000
$1,160.00 ($1.16/ea)
$0.00
5/16"-18 x 6-1/2" PT
87262
1
$3.00 ($3.00/ea)
100
$275.00 ($2.75/ea)
1000
$2,500.00 ($2.50/ea)
$0.00
5/16"-18 x 7" PT
87272
1
$8.10 ($8.10/ea)
100
$700.00 ($7.00/ea)
1000
$6,500.00 ($6.50/ea)
$0.00
5/16"-18 x 8" PT
87282
1
$8.25 ($8.25/ea)
100
$725.00 ($7.25/ea)
1000
$6,750.00 ($6.75/ea)
$0.00
5/16"-18 x 9" PT
87292
1
$12.60 ($12.60/ea)
100
$1,160.00 ($11.60/ea)
1000
$11,000.00 ($11.00/ea)
$0.00
5/16"-18 x 10" PT
87302
1
$15.94 ($15.94/ea)
100
$1,277.00 ($12.77/ea)
1000
$12,160.00 ($12.16/ea)
$0.00
5/16"-18 x 12" PT
87312
1
$19.67 ($19.67/ea)
100
$1,613.00 ($16.13/ea)
1000
$15,360.00 ($15.36/ea)
$0.00

*Volume pricing available on select products. Products without quantity breaks are priced per unit.

Page Total: $0.00

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