5/16-18 Button Socket Head Screws Black Oxide 18-8 Stainless Steel

5/16"-18 Black Oxide Stainless Steel Button Head Socket Cap Screws

Screw Diameter - Thread Pitch: 5/16"-18


5/16"-18 Button Head Socket Cap Screws are bolts or machine screws with a Hex or Allen drive style.

  • Commonly referred to as allen bolts, button heads, or socket head screws
  • Clean and unstamped domed head with a flat bottom that protrudes above the installation surface
  • Cylindrical head and hexagonal drive style
  • Head diameter is nominally 1.5 times or more that of the screw shank (major) diameter
  • Chemically treated to add a mild extra layer of corrosion and abrasion resistance
  • Sleek black finished look


Black Oxide Stainless Steel Fasteners are commonly used in industries where the durability of Stainless Steel is required, but a smooth black look is desired. These industries include firearms, automotive (car and motorcycle), camping gear, archery, knife builds and product manufacturing.

Select Products Below See Product Specifications

NA = "Not Sold In Single Quantity"

Size
Select Package Quantity
SubTotal
Button Socket Head Screws Black Oxide 18-8 SS - 5/16-18 x 1/2" (FT)
SKU #12130002
Button Socket Head Screws Black Oxide 18-8 SS - 5/16-18 x 1/2" (FT)
SKU #12130002
1
NA
25
$14.25 (0.57/ea)
100
$43.00 (0.43/ea)
1000
$390.00 (0.39/ea)
Subtotal: $0.00 /
Button Socket Head Screws Black Oxide 18-8 SS - 5/16-18 x 5/8" (FT)
SKU #12130014
Button Socket Head Screws Black Oxide 18-8 SS - 5/16-18 x 5/8" (FT)
SKU #12130014
1
$0.73 (0.73/ea)
25
$17.00 (0.68/ea)
100
$54.00 (0.54/ea)
1000
$490.00 (0.49/ea)
Subtotal: $0.00 /
Button Socket Head Screws Black Oxide 18-8 SS - 5/16-18 x 3/4" (FT)
SKU #12130026
Button Socket Head Screws Black Oxide 18-8 SS - 5/16-18 x 3/4" (FT)
SKU #12130026
1
$0.83 (0.83/ea)
25
$19.75 (0.79/ea)
100
$60.00 (0.6/ea)
1000
$550.00 (0.55/ea)
Subtotal: $0.00 /
Button Socket Head Screws Black Oxide 18-8 SS - 5/16-18 x 1" (FT)
SKU #12130038
Button Socket Head Screws Black Oxide 18-8 SS - 5/16-18 x 1" (FT)
SKU #12130038
1
$0.93 (0.93/ea)
25
$22.25 (0.89/ea)
100
$69.00 (0.69/ea)
1000
$630.00 (0.63/ea)
Subtotal: $0.00 /



FREQUENTLY USED WITH

1
$3.15 (3.15/ea)
10
$29.80 (2.98/ea)
25
$72.75 (2.91/ea)
50
$129.50 (2.59/ea)
Subtotal: $0.00 /
1
$0.65 (0.65/ea)
25
$13.75 (0.55/ea)
100
$45.00 (0.45/ea)
1000
$400.00 (0.4/ea)
Subtotal: $0.00 /
1
$0.70 (0.7/ea)
25
$15.75 (0.63/ea)
100
$60.00 (0.6/ea)
1000
$570.00 (0.57/ea)
Subtotal: $0.00 /
1
NA
25
$11.75 (0.47/ea)
100
$38.00 (0.38/ea)
1000
$350.00 (0.35/ea)
Subtotal: $0.00 /
1
NA
25
$7.25 (0.29/ea)
100
$23.00 (0.23/ea)
1000
$220.00 (0.22/ea)
Subtotal: $0.00 /

Product Specifications
ANSI
ANSI B1.1
Color
Black
Corrosion Resistant
Yes
Drive Style
Internal Hex (Allen)
Finish
Black Oxide
Grade
18-8
Head Diameter
Max 0.547 - Min 0.527
Head Height
Max 0.166 - Min 0.152
Head Style
Button
Hex Drive
3/16"
Material
Stainless Steel
Product Type
Button Head Socket Cap Screws
System of Measurement (Unit)
Inch
Thread Diameter
(5/16") Max 0.3113 - Min 0.3026
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