Countersunk Sheet Metal Die

Create a raised edge in sheet metal that locks into the rolled edge of another piece.

Countersunk sheet metal die.

Grainger offers a huge selection of sheet metal screws for your hvac and other metalwork projects. Machined countersinks are created with a drill press and formed countersinks are made with punch press tooling the best option depends on your project and part geometry. Create flares around already cut holes in sheet metal up to 3 16 thick to make the edges stronger and more rigid. The features of a formed countersink are the form angle major diameter minor diameter and depth see figure 1.

10 x 3 in plain 18 8 stainless steel tapping sheet metal screw with flat countersunk head type 100 item 31jn43 mfr. Also known as dimple dies. Get it as soon as thu sep 3. 4 2 out of 5 stars 60.

The machined type of countersink is used in a or b series standard units for countersinking up to 10 gage material. Unlike a machined countersink a formed countersink does not remove but instead displaces material. And in doing so your screw joint may be weakened. The point and the surface of the punch apply force and displace material as the sheet is pressed against a blank die.

Select the head type and overall size you need in lengths ranging from 1 4 l to 4 l. Sheet metal hole flaring dies. Here is a web address for a chart that will help with variables such as. Hardware diameter countersink angle through hole diameter sheet.

The die shown at the left allows the punch and die to bottom the countersink shape into the workpiece at the bottom of the stroke due to the nature of this style material will deform and a burr will occur. Hilitchi 10 hex washer head self drilling sheet metal tek screws assortment kit set with drill point self driller zinc plated carbon steel 160 pieces 4 5 out of 5 stars 35 13 79 13. After drilling a hole in the table for the screw you will be using and the matching hole in the sheet metal use this punch to make a depression in the sheet metal so the screw head sits below the surface of the sheet metal. When countersinking metal sheet you may enlarge the through hole on the bottom of the sheet too much before you get the hole on the top of the sheet large enough for the screw head to sit flush.

Sheet metal countersink chart choose from a variety of standard countersink options which can either be formed or machined into sheet part parts. No c sink needed no metal removed from the sheet metal and more strength at the area of the screw head.