Sealing Screws
Self Sealing Screws Zinc Plated Hex Washer Head EPDM Washer For Outdoor Electrical Box Bulk Wholesale
Quick comparison – sealing screw vs. regular screw
| Feature | Regular screw | Sealing screw |
|---|---|---|
| Seal against water | ❌ No | ✅ Yes – rubber O ring or washer |
| Extra sealant needed | ✅ Yes | ❌ No – pre‑installed |
| IP rated | ❌ No | ✅ IP67 / IP68 |
| Washer loss risk | ✅ High | ❌ Zero – captive seal |
| One‑piece installation | ❌ No – screw + sealant | ✅ Yes – screw and seal together |
Frequently asked questions
Q: What is a sealing screw? A: A screw with a rubber O ring or sealing washer already fitted under the head. When you tighten it, the rubber compresses and creates a watertight and dust‑tight seal. No extra sealant or separate washer needed.
Q: What’s the difference between the rubber materials?
| Rubber type | Best for |
|---|---|
| NBR (nitrile) | Oil resistance, general purpose |
| Silicone | Extreme cold and heat (-50°C to 200°C) |
| EPDM | Outdoor, UV, rain, temperature changes |
| FKM (Viton) | Chemicals, fuels, acids, harsh environments |
Q: What head styles are available?
| Head type | Drive | Best use |
|---|---|---|
| Phillips pan head | Phillips screwdriver | General assembly |
| Hex washer head | Wrench or socket | Wide clamping, no separate washer |
| Hex socket head | Allen key | Tight spaces, higher torque |
Q: How waterproof are they?
| Rating | What it means |
|---|---|
| IP67 | Submersible in 1 meter of water for 30 minutes |
| IP68 | Continuous underwater use – pumps, tanks, submerged equipment |
Q: Can I get custom sizes? A: Yes. Send us your drawing or sample. We make non‑standard lengths, head styles, and seal materials. OEM orders welcome. Contact us
Q: What metals are available?
| Material | Best for |
|---|---|
| 304 stainless steel | Outdoor, wet, general rust protection |
| 316 stainless steel | Marine, saltwater, chemical exposure |
| Zinc plated carbon steel | Indoor, light outdoor, budget projects |
Q: Where are sealing screws used? A: Outdoor electrical enclosures. Junction boxes. Electric and gas meters. Marine equipment and boat fittings. Car lights and sensors. Metal roofing. Industrial control panels. Any place that gets wet or dusty.
Quality assurance
ISO 9001 and ISO 10012 certified. Every O ring inspected before packing. Every batch tested. O rings stay in place during shipping and installation.
- Pre‑installed rubber O ring or sealing washer
- No extra sealant needed
- IP67 and IP68 waterproof ratings
- Phillips pan head, hex washer head, hex socket head
- NBR / silicone / EPDM / FKM rubber options
- 304 stainless steel, 316 stainless steel, carbon steel
About YH Fastener
Since 1998. We produce sealing screws, self tapping screws, machine screws, shoulder screws, and custom fasteners. Factory direct. Ship to 60+ countries.
