Sealing screws (aka integral seal fasteners or self-sealing screws) have a groove under the screw head where a silicone O-ring is fitted. When the seal screw is tightened it compresses the O-ring to form a seal against the mating surface.
Berg sealing screws are available in sizes 2-56, 4-40, 6-32, 8-32, 10-24, 10-32 and ¼ - 20 (M2 x .4, M3 x .5, M4 x .7, M6 x 1mm) in 303 stainless steel. Seal screw benefits and specifications include:
- Reusable
- Slotted pan head
- Pressure range up to 6000 PSI
- Clearance holes recommended for maximum sealing
- Maximum temperature range +500°F to -160°F