#4-40 Button Socket Head Screws Black Oxide 18-8 Stainless Steel

#4-40 Black Oxide Stainless Steel Button Head Socket Cap Screws

Screw Diameter - Thread Pitch: #4-40


#4-40 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/SKU
Select Package Quantity Price
SubTotal
#4-40 x 1/4" FT
#4-40 x 1/4" FT
1 $0.11 (0.11/ea)
100 $8.00 (0.08/ea)
1000 $70.00 (0.07/ea)
Subtotal: $0.00 /
#4-40 x 5/16" FT
#4-40 x 5/16" FT
1 $0.14 (0.14/ea)
100 $12.00 (0.12/ea)
1000 $100.00 (0.1/ea)
Subtotal: $0.00 /
#4-40 x 3/8" FT
#4-40 x 3/8" FT
1 $0.12 (0.12/ea)
100 $8.00 (0.08/ea)
1000 $70.00 (0.07/ea)
Subtotal: $0.00 /
#4-40 x 1/2" FT
#4-40 x 1/2" FT
1 $0.13 (0.13/ea)
100 $8.00 (0.08/ea)
1000 $70.00 (0.07/ea)
Subtotal: $0.00 /

Frequently Used With

1 $3.35 (3.35/ea)
10 $29.80 (2.98/ea)
50 $129.50 (2.59/ea)
Subtotal: $0.00
1 $0.16 (0.16/ea)
100 $12.00 (0.12/ea)
1000 $70.00 (0.07/ea)
Subtotal: $0.00
1 $0.20 (0.2/ea)
100 $18.00 (0.18/ea)
1000 $160.00 (0.16/ea)
Subtotal: $0.00
1 $0.15 (0.15/ea)
100 $8.00 (0.08/ea)
1000 $70.00 (0.07/ea)
Subtotal: $0.00
1 $0.09 (0.09/ea)
100 $6.00 (0.06/ea)
1000 $50.00 (0.05/ea)
Subtotal: $0.00

Product Specifications
ANSI
B1.1
Class
2A
Color
Black
Corrosion Resistant
Yes
Drive Style
Internal Hex (Allen)
Finish
Black Oxide
Grade
18-8
Head Diameter
Max 0.213 - Min 0.211
Head Height
Max 0.059 - Min 0.051
Head Style
Button
Hex Drive
1/16"
Material
Stainless Steel
Product Type
Button Head Socket Cap Screws
System of Measurement (Unit)
Inch
Thread Diameter
(#4) Max 0.1112 - Min 0.1061
Thread Direction
Right Hand
Thread Pitch (Count)
40 Per Inch
Thread Standard
UNC
Thread Type
Coarse
Tolerance (IFI)
Actual measurements may vary slightly +/- depending on production run within IFI Tolerances