


Premium Sealing Inserts & O-Rings: Leak-Proof Industrial Sealing
Keep your enclosures airtight with our professional-grade Sealing Inserts and O-Rings. Designed to fit all standard Metric, PG, and NPT cable glands, these accessories are the ultimate defense against moisture, dust, and environmental aging. As a reliable Factory, CHSO provides Bulk supply for high-performance sealing in any industrial setup.
- IP68 Guaranteed Protection: Our NBR and EPDM O-rings create a rock-solid seal between the cable gland and the enclosure, ensuring your electrical systems stay dry even in high-pressure wash-down environments.
- Engineered for Harsh Conditions: Whether it’s the scorching sun or freezing winters, our Sealing Inserts remain flexible and won’t get brittle or crack over time. They are built to withstand UV exposure and common industrial oils.
- Perfect Fit for Custom Cables: From standard circular seals to specialized Multi-hole and Flat-hole Inserts, we help you seal any cable type without compromising on strain relief.
- One-Stop Wholesale Sourcing: As a dedicated Supplier, we keep massive stock of all sizes (M12 to M63, etc.), allowing you to consolidate your Locknuts, Plugs, and Inserts in one shipment to save on logistics costs.
Sealing Inserts & O-Rings Description
As a dedicated Sealing Inserts & O-Rings Manufacturer, CHSOCN provides a robust selection of Sealing Inserts and O-Rings to ensure your electrical enclosures remain completely leak-proof. Our factory supplies high-grade NBR and EPDM components that maintain an IP68 seal, effectively shielding sensitive wiring from moisture, dust, and oil ingress.
These accessories are essential for automation panels and outdoor telecommunications, where they solve the common problem of environmental aging. We offer Bulk supply across all Metric, PG, and NPT sizes, specifically catering to the needs of every Wholesale Distributor and Exporter. View our Full Sealing Supply to find the perfect fit for your next industrial project and cut down on maintenance costs.
Sealing Plugs Datasheet

| Item No. | O.D | Lengh | Std.Pkg. | ||
| Black | A mm | B mm | B1mm | C mm | PCS |
| SPR-055A-B | 11 | 5.5 | 8.7 | 18 | 100 |
| SPR-055B-B | 9.6 | 5.5 | 7.1 | 18 | 100 |
| SPR-067-B | 9.5 | 6.7 | 7.2 | 18 | 100 |
| SPR-071-B | 13.2 | 7 | 10.7 | 18 | 100 |
| SPR-079-B | 11 | 7.9 | 8.7 | 18 | 100 |
| SPR-092-B | 15.5 | 9.2 | 12.7 | 18 | 100 |
| SPR-103-B | 13.5 | 10.3 | 10.7 | 18 | 100 |
| SPR-105-B | 17 | 10.5 | 14.3 | 18 | 100 |
| SPR-118-B | 17 | 11.8 | 14.3 | 18 | 100 |
| SPR-120-B | 15.5 | 12 | 12.7 | 18 | 100 |
| SPR-140-B | 17 | 14 | 14.4 | 18 | 100 |
| SPR-158-B | 22 | 15.8 | 19.3 | 18 | 50 |
| SPR-178-B | 22 | 17.8 | 19.3 | 18 | 50 |
| SPR-215-B | 28 | 21.5 | 25 | 18 | 50 |
| SPR-245-B | 28 | 24.5 | 25 | 18 | 50 |
| SPR-262-B | 35 | 26.2 | 33 | 20 | 10 |
| SPR-306-B | 36 | 30.6 | 33 | 20 | 10 |
| SPR-333-B | 45 | 33.3 | 43.1 | 20 | 10 |
| SPR-410-B | 46 | 41 | 43.1 | 20 | 10 |
| SPR-473-B | 53 | 47.3 | 51.6 | 20 | 10 |
| SPR-515-B | 54.5 | 51.5 | – | 20 | 10 |
Material: Made of rubber.
Applications: For use with metric threads, G (PF) threads, and fixing heads. Features waterproof, non-slip, and leveling properties.
Get Free Quote of Bulk Sealing Inserts & O-Rings
Get factory-direct quotes and free samples. Ensure a 100% leak-proof IP68 seal for your industrial project today. Inquire Now!
FAQs
Sealing Inserts & O-Rings: The Standard for Airtight Enclosures
Most installers overlook these small parts, but as a specialized Sealing Inserts and O-Rings Manufacturer, we know they are the “last mile” of electrical safety. Our NBR and EPDM Sealing Inserts are specifically designed to fill the gap between the cable and the gland body, providing a certified IP68 waterproof barrier. Whether you are dealing with Metric, PG, or NPT threads, having the correct gasket prevents moisture from “wicking” into your automation panels or telecommunication hubs. We keep a massive Supply for Sale to help every Distributor avoid project delays caused by missing accessories.
Custom Multi-Hole and Flat-Hole Sealing Options
Not every cable is a standard circle. To solve the challenge of sealing multiple wires or flat ribbon cables, our Factory offers specialized Multi-hole Sealing Inserts. These are the go-to choice for Wholesale buyers who need to manage high-density wiring in solar inverters or server racks without drilling extra holes in the cabinet. By choosing the right Rubber Insert from our Company, you ensure a vibration-proof fit that meets strict international compliance. This flexibility makes us a preferred Exporter for complex global infrastructure projects.
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