A countersunk head with a flat top surface and a cone-shaped bearing surface with a head angle of approximately 90°.
Used in applications where protrusion of the fastener above the mating surface is unacceptable.
Requires a countersunk hole in top surface.
Stocked Materials:
- Mild Steel
- Brass
- Stainless Steel grades A2 (304) and A4 (316)
Special to order materials:
- Super Duplex
- Titanium
- Incalloy
Available with the following Coatings:
- Zinc Plated
- Nickel plated
These are stocked in both metric and imperial thread forms as follows:
- Metric
- BA
- UNF
- UNC
- Whitworth
- BSF