4-40 UNC x 1/4 inch Socket Countersunk Screws (ANSI B18.3) - Black Marine Stainless Steel (A4) Description
The 4-40 UNC x 1/4 inch Socket Countersunk Screws (ANSI B18.3) - Black Marine Stainless Steel (A4) has the following features:
- 4-40 Thread Size (T)
- 1/16 inch Hexagon A/F (A)
- 0.055 inch Hexagon Depth (P)
- ANSI B18.3 Manufacturing Standard
- 1/4 inch Overall Length (L)
- Marine Stainless Steel (A4) Material
- Marine Stainless Steel (A4) Material Specification
- 40 TPI Screw Thread Pitch
- 82 +/- 2 Degrees Countersunk Angle
- Matte Black Finish
- +/- 0.13mm General Tolerance
- Imperial Metric or Imperial?
- 0.255 inch Head Diameter [max] (D)
- 0.083 inch Countersunk Length (H)
- 0.218 inch Head Diameter [min] (D)
Discover more about the Imperial Socket Countersunk Screws range.
Imperial Socket Countersunk Screws are designed for use alongside countersunk holes. The addition of a standard socket drive means that this type of screw can be installed using an Allen Key or Hexagon Drive Bit.
Socket Countersunk Screws are manufactured in imperial thread sizes ranging from No. 0 up to 7/8 inch. lengths are available from 1/8 inch to 10 inch.