#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.
See Product Specifications
NA = "Not Sold In Single Quantity"
Select Package Quantity
Loading ...
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
