1 / 5
Countersunk flat head sealing screws feature a precision machined 82 degree countersunk head with a silicone O ring pre installed in the under head groove. When tightened the flat head sits flush with the material surface while the O ring compresses to create a complete watertight seal.
These self sealing screws are ideal for electronics enclosures, medical device housings, portable instrument cases, chemical resistant boxes, and food processing equipment where a smooth surface finish is required.
The flat head countersunk design allows for flush mounting with no protruding parts making these screws perfect for applications where the screw head must not interfere with other components or where a clean appearance is important.
Manufactured from stainless steel 316 for superior corrosion resistance in harsh environments. Silicone O ring provides excellent performance across a wide temperature range from -50°C to 200°C. Black oxide finish available for reduced glare and improved aesthetics.
Standard metric thread sizes M3 M4 M5 with custom lengths available. Viton O ring option available for chemical resistance applications.
Every screw undergoes 100% dimensional inspection and O ring integrity testing before packing. OEM and custom manufacturing services available with short lead times.
82 degree countersunk flat head sits completely flush with the material surface leaving no protruding parts. Perfect for applications where a smooth finish is required.
Pre installed silicone O ring compresses during installation creating a complete watertight seal against water immersion and dust ingress.
High grade marine stainless steel offers superior corrosion resistance for harsh environments including saltwater and chemical exposure.
Silicone O ring performs reliably from -50°C to 200°C making these screws suitable for extreme temperature applications.
The integrated O ring design eliminates the need for separate sealing washers or liquid sealant saving assembly time and reducing mess.
The flat head design allows for a smooth clean surface with no screw heads sticking out ideal for medical devices and electronics enclosures.
Choose from silicone for wide temperature range or Viton for chemical resistance based on your specific application requirements.
Uniform metric threads M3 M4 M5 ensure consistent driving torque and reliable clamping force on every screw.
Optional black oxide coating reduces glare and provides a professional appearance for visible applications.
Standard lengths from 6mm to 25mm in stock. Custom lengths available for OEM orders.
Feel free to send your inquiry with product details, specifications, or custom requirements. We’ll reply to you within 24 hours with a professional quote.
The screw is engineered with an under-head groove holding a pre-installed O-ring. When fastened into a standard countersunk hole, the O-ring compresses fully against the mating surface, providing an airtight and watertight seal while keeping the head completely flush.
These screws provide up to IP67 waterproof and dustproof protection when installed correctly, effectively preventing dust ingress and water penetration during temporary immersion.
Silicone O-rings are ideal for extreme temperature variations (-50°C to 200°C) and general environmental sealing, whereas Viton O-rings offer enhanced chemical, oil, and solvent resistance for harsher industrial settings.
Stainless steel 316 contains molybdenum, granting significantly higher resistance to corrosion, pitting, chlorides, and marine environments compared to standard 304 stainless steel.
Yes. While standard metric sizes such as M3, M4, and M5 are readily available, OEM and custom manufacturing services can accommodate specific thread pitches, lengths, and custom surface finishes.
No additional sealants, thread tapes, or external washers are required. The integrated elastomeric O-ring provides a self-sealing mechanism directly upon proper tightening.
