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

#4-40 Black Oxide Stainless Steel Socket Cap Screws

Screw Diameter - Thread Pitch: #4-40


#4-40 Black Oxide Knurled Head Socket cap screws are machine screws with an Allen drive style.

  • Externally grooved cap head
  • Can be driven manually, or with a Hex Allen Bit or Key
  • Cylindrical head and hexagonal drive style
  • Sleek black finished look
  • Type of threaded fastener whose head diameter is nominally 1.5 times or more that of the screw shank (major) diameter
Black Oxide Stainless Steel Screws are used in applications looking for a sleek black look, as well as a mild layer of additional protection. Black Oxide Stainless Steel Socket Cap Screws are more corrosion and abrasion resistant than standard 18-8 stainless steel. Black Oxide Stainless Steel is often used in the automotive industry and on tool, knife and firearm builds.


Sizes Listed As:
Diameter - Thread Pitch x Length from Underside of Head
FT = Full Thread
PT = Partial Thread

Select Products Below
Product Specifications
Body Diameter
(#4) Max 0.1112 - Min 0.1061
Chamfer on Radius
Max 0.005
Color
Black
Corrosion Resistant
Yes
Drive Style
Internal Hex
Finish
Black Oxide
Head Diameter
Max 0.183 - Min 0.176
Head Height
Max 0.112 - Min 0.108
Head Style
Socket Cap
Hex Drive
3/32"
Knurled
Yes
Material
Black Oxide 18-8 Stainless Steel
Product Type
Socket Cap Screws
System of Measurement (Unit)
Imperial
Thread Direction
Right Hand
Thread Pitch (Count)
40
Thread Standard
UNC
Thread Type
Coarse
Select Products Below
Qty
Size
Select Package Quantity
SubTotal
#4-40 x 1/4" FT
SKU #12160002
#4-40 x 1/4" FT
SKU #12160002
1
$0.15 (0.15/ea)
25
$2.50 (0.10/ea)
100
$9.00 (0.09/ea)
1000
$80.00 (0.08/ea)
 
#4-40 x 5/16" FT
SKU #12160014
#4-40 x 5/16" FT
SKU #12160014
1
$0.15 (0.15/ea)
25
$2.50 (0.10/ea)
100
$9.00 (0.09/ea)
1000
$80.00 (0.08/ea)
 
#4-40 x 3/8" FT
SKU #12160026
#4-40 x 3/8" FT
SKU #12160026
1
$0.15 (0.15/ea)
25
$2.75 (0.11/ea)
100
$10.00 (0.10/ea)
1000
$90.00 (0.09/ea)
 
#4-40 x 1/2" FT
SKU #12160038
#4-40 x 1/2" FT
SKU #12160038
1
$0.15 (0.15/ea)
25
$2.75 (0.11/ea)
100
$10.00 (0.10/ea)
1000
$90.00 (0.09/ea)
 
#4-40 x 5/8" FT
SKU #12160050
#4-40 x 5/8" FT
SKU #12160050
1
$0.15 (0.15/ea)
25
$3.00 (0.12/ea)
100
$11.00 (0.11/ea)
1000
$100.00 (0.10/ea)
 
#4-40 x 3/4" FT
SKU #12160062
#4-40 x 3/4" FT
SKU #12160062
1
$0.17 (0.17/ea)
25
$3.75 (0.15/ea)
100
$14.00 (0.14/ea)
1000
$120.00 (0.12/ea)