Hex Cap Screws 18-8 Stainless Steel 3/8-16"

3/8"-16 Stainless Steel Hex Cap Screws

Diameter - Thread Pitch: 3/8" - 16


  • 3/8"-16
  • 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


**3/8"-16 Hex Cap Screws listed as PT, usually have a threaded portion of about 1".
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 18-8 SS - 3/8-16 x 3/8" FT
SKU #89002
Hex Cap Screws 18-8 SS - 3/8-16 x 3/8" FT
SKU #89002
1
$1.03 (1.03/ea)
25
$23.00 (0.92/ea)
100
$77.00 (0.77/ea)
1000
$690.00 (0.69/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 1/2" FT
SKU #89012
Hex Cap Screws 18-8 SS - 3/8-16 x 1/2" FT
SKU #89012
1
NA
25
$8.75 (0.35/ea)
100
$29.00 (0.29/ea)
1000
$260.00 (0.26/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 5/8" FT
SKU #89022
Hex Cap Screws 18-8 SS - 3/8-16 x 5/8" FT
SKU #89022
1
NA
25
$9.00 (0.36/ea)
100
$30.00 (0.3/ea)
1000
$270.00 (0.27/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 3/4" FT
SKU #89032
Hex Cap Screws 18-8 SS - 3/8-16 x 3/4" FT
SKU #89032
1
NA
25
$9.50 (0.38/ea)
100
$31.00 (0.31/ea)
1000
$280.00 (0.28/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 7/8" FT
SKU #89042
Hex Cap Screws 18-8 SS - 3/8-16 x 7/8" FT
SKU #89042
1
NA
25
$9.75 (0.39/ea)
100
$31.00 (0.31/ea)
1000
$280.00 (0.28/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 1" FT
SKU #89052
Hex Cap Screws 18-8 SS - 3/8-16 x 1" FT
SKU #89052
1
NA
25
$10.00 (0.4/ea)
100
$32.00 (0.32/ea)
1000
$280.00 (0.28/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 1-1/8" FT
SKU #89062
Hex Cap Screws 18-8 SS - 3/8-16 x 1-1/8" FT
SKU #89062
1
NA
25
$15.25 (0.61/ea)
100
$51.00 (0.51/ea)
1000
$470.00 (0.47/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 1-1/4" FT
SKU #89072
Hex Cap Screws 18-8 SS - 3/8-16 x 1-1/4" FT
SKU #89072
1
NA
25
$11.50 (0.46/ea)
100
$37.00 (0.37/ea)
1000
$330.00 (0.33/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 1-3/8" PT
SKU #89082
Hex Cap Screws 18-8 SS - 3/8-16 x 1-3/8" PT
SKU #89082
1
$1.16 (1.16/ea)
25
$26.00 (1.04/ea)
100
$78.00 (0.78/ea)
1000
$740.00 (0.74/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 1-1/2" PT
SKU #89092
Hex Cap Screws 18-8 SS - 3/8-16 x 1-1/2" PT
SKU #89092
1
NA
25
$14.25 (0.57/ea)
100
$53.00 (0.53/ea)
1000
$480.00 (0.48/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 1-3/4" PT
SKU #89102
Hex Cap Screws 18-8 SS - 3/8-16 x 1-3/4" PT
SKU #89102
1
NA
25
$13.25 (0.53/ea)
100
$44.00 (0.44/ea)
1000
$390.00 (0.39/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 2" PT
SKU #89112
Hex Cap Screws 18-8 SS - 3/8-16 x 2" PT
SKU #89112
1
NA
25
$15.50 (0.62/ea)
100
$53.00 (0.53/ea)
1000
$470.00 (0.47/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 2-1/4" PT
SKU #89122
Hex Cap Screws 18-8 SS - 3/8-16 x 2-1/4" PT
SKU #89122
1
$0.77 (0.77/ea)
25
$17.25 (0.69/ea)
100
$66.00 (0.66/ea)
1000
$590.00 (0.59/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 2-1/2" PT
SKU #89132
Hex Cap Screws 18-8 SS - 3/8-16 x 2-1/2" PT
SKU #89132
1
$0.80 (0.8/ea)
25
$18.00 (0.72/ea)
100
$67.00 (0.67/ea)
1000
$600.00 (0.6/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 2-3/4" PT
SKU #89142
Hex Cap Screws 18-8 SS - 3/8-16 x 2-3/4" PT
SKU #89142
1
$0.91 (0.91/ea)
25
$20.25 (0.81/ea)
100
$77.00 (0.77/ea)
1000
$690.00 (0.69/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 3" PT
SKU #89152
Hex Cap Screws 18-8 SS - 3/8-16 x 3" PT
SKU #89152
1
$0.94 (0.94/ea)
25
$21.00 (0.84/ea)
100
$81.00 (0.81/ea)
1000
$720.00 (0.72/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 3-1/4" PT
SKU #89162
Hex Cap Screws 18-8 SS - 3/8-16 x 3-1/4" PT
SKU #89162
1
$1.04 (1.04/ea)
25
$23.25 (0.93/ea)
100
$89.00 (0.89/ea)
1000
$800.00 (0.8/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 3-1/2" PT
SKU #89172
Hex Cap Screws 18-8 SS - 3/8-16 x 3-1/2" PT
SKU #89172
1
$1.05 (1.05/ea)
25
$23.50 (0.94/ea)
100
$92.00 (0.92/ea)
1000
$820.00 (0.82/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 3-3/4" PT
SKU #89182
Hex Cap Screws 18-8 SS - 3/8-16 x 3-3/4" PT
SKU #89182
1
$1.19 (1.19/ea)
25
$26.75 (1.07/ea)
100
$101.00 (1.01/ea)
1000
$910.00 (0.91/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 4" PT
SKU #89192
Hex Cap Screws 18-8 SS - 3/8-16 x 4" PT
SKU #89192
1
$1.24 (1.24/ea)
25
$27.75 (1.11/ea)
100
$103.00 (1.03/ea)
1000
$920.00 (0.92/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 4-1/4" PT
SKU #89202
Hex Cap Screws 18-8 SS - 3/8-16 x 4-1/4" PT
SKU #89202
1
$1.40 (1.4/ea)
25
$31.50 (1.26/ea)
100
$122.00 (1.22/ea)
1000
$1,090.00 (1.09/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 4-1/2" PT
SKU #89212
Hex Cap Screws 18-8 SS - 3/8-16 x 4-1/2" PT
SKU #89212
1
$1.48 (1.48/ea)
25
$33.25 (1.33/ea)
100
$126.00 (1.26/ea)
1000
$1,130.00 (1.13/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 4-3/4" PT
SKU #89222
Hex Cap Screws 18-8 SS - 3/8-16 x 4-3/4" PT
SKU #89222
1
$1.62 (1.62/ea)
25
$36.25 (1.45/ea)
100
$138.00 (1.38/ea)
1000
$1,310.00 (1.31/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 5" PT
SKU #89232
Hex Cap Screws 18-8 SS - 3/8-16 x 5" PT
SKU #89232
1
$1.74 (1.74/ea)
25
$36.25 (1.45/ea)
100
$138.00 (1.38/ea)
1000
$1,340.00 (1.34/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 5-1/2" PT
SKU #89242
Hex Cap Screws 18-8 SS - 3/8-16 x 5-1/2" PT
SKU #89242
1
$1.93 (1.93/ea)
25
$40.25 (1.61/ea)
100
$153.00 (1.53/ea)
1000
$1,490.00 (1.49/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 6" PT
SKU #89252
Hex Cap Screws 18-8 SS - 3/8-16 x 6" PT
SKU #89252
1
$2.00 (2/ea)
25
$44.00 (1.76/ea)
100
$167.00 (1.67/ea)
1000
$1,630.00 (1.63/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 7" PT
SKU #89262
Hex Cap Screws 18-8 SS - 3/8-16 x 7" PT
SKU #89262
1
$3.19 (3.19/ea)
25
$74.00 (2.96/ea)
100
$281.00 (2.81/ea)
1000
$2,780.00 (2.78/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 7-1/2" PT
SKU #89272
Hex Cap Screws 18-8 SS - 3/8-16 x 7-1/2" PT
SKU #89272
1
$3.74 (3.74/ea)
25
$85.00 (3.4/ea)
100
$323.00 (3.23/ea)
1000
$3,200.00 (3.2/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 8" PT
SKU #89282
Hex Cap Screws 18-8 SS - 3/8-16 x 8" PT
SKU #89282
1
$4.05 (4.05/ea)
25
$93.75 (3.75/ea)
100
$356.00 (3.56/ea)
1000
$3,520.00 (3.52/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 9" PT
SKU #89292
Hex Cap Screws 18-8 SS - 3/8-16 x 9" PT
SKU #89292
1
$4.97 (4.97/ea)
25
$108.50 (4.34/ea)
100
$428.00 (4.28/ea)
1000
$4,080.00 (4.08/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 10" PT
SKU #89302
Hex Cap Screws 18-8 SS - 3/8-16 x 10" PT
SKU #89302
1
$5.42 (5.42/ea)
25
$122.25 (4.89/ea)
100
$483.00 (4.83/ea)
1000
$4,600.00 (4.6/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 12" PT
SKU #89312
Hex Cap Screws 18-8 SS - 3/8-16 x 12" PT
SKU #89312
1
$8.84 (8.84/ea)
25
$177.00 (7.08/ea)
100
$698.00 (6.98/ea)
1000
$6,650.00 (6.65/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 14" PT
SKU #89322
Hex Cap Screws 18-8 SS - 3/8-16 x 14" PT
SKU #89322
1
$21.85 (21.85/ea)
25
$482.25 (19.29/ea)
100
$1,918.00 (19.18/ea)
1000
$18,270.00 (18.27/ea)
Subtotal: $0.00 /
Hex Cap Screws 18-8 SS - 3/8-16 x 16" PT
SKU #89332
Hex Cap Screws 18-8 SS - 3/8-16 x 16" PT
SKU #89332
1
$26.96 (26.96/ea)
25
$536.50 (21.46/ea)
100
$2,100.00 (21/ea)
1000
$20,830.00 (20.83/ea)
Subtotal: $0.00 /

Frequently Used With

1
NA
25
$4.25 (0.17/ea)
100
$15.00 (0.15/ea)
1000
$130.00 (0.13/ea)
Subtotal: $0.00 /
1
NA
25
$2.50 (0.1/ea)
100
$8.00 (0.08/ea)
1000
$70.00 (0.07/ea)
Subtotal: $0.00 /

Product Specifications
ASME
B18.2.1
Color
Silver
Corrosion Resistant
Yes
Diameter
3/8"
Drive Style
External Hex
Grade
18-8
Head Height
Basic 15/16", Max 0.243 - Min 0.226
Head Height Max
0.243
Head Style
Hex
Material
Stainless Steel
Product Type
Hex Cap Screws
Standards Met
ASME B18.2.1
System of Measurement (Unit)
Inch
Thread Direction
Right Hand
Thread Pitch (Count)
16 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 0.650 - Min 0.628
Wrench Size
9/16"