Hy-Tech Shipping Caps and Plugs can be utilized to seal the inlets and outlets of Face Seal-style fittings. By incorporating a flat surface, our Shipping Caps and Plugs protect the integrity of the fittings while only requiring a single seal.
Shipping Caps & Plugs

Key Features and Benefits
Flat Surface Design
Used in combination with a blind, un-plated nickel gasket, requiring only one seal on the opposing Face Seal-style bead. Our un-plated gasket design provides a cost-effective option that does not sacrifice quality.
Prevents Particulate Entry
The blind gasket prevents particles from entering the system during assembly, protecting it from potential contamination.
Minimizes Surface Damage
Hy-Tech purposefully selected gasket hardness conducive to minimizing damage to the surface of the sealing bead. Our softer gasket enhances the integrity of the air-seal.
Additional Advantages
- Lower cost up to 66%!
- Easy installation
- In line with industry standards for leak rates, ensuring high performance
- Extends the longevity of the sealing bead
Case Study/Technical Notes
Fact: Face Seal-style fittings typically rely on standard three-piece swivel caps and plugs to seal the inlets and outlets of their systems.
Problem: These fittings require expensive sealing beads. Additionally, standard caps and plugs are generally combined with standard gaskets containing orifices, necessitating the establishment of a seal in two separate areas. These orifices introduce the potential of the silver/wax lubricant from female nuts entering the system.
Solution: Hy-Tech’s design provides a cost-effective solution, utilizing a flat surface on the cap or plug in combination with a blind, un-plated nickel gasket. This prevents system contamination while minimizing damage to the sealing bead surface.
PRODUCT ILLUSTRATION

Part Numbers and Specs
Shipping Plugs
| Part Number | Hex Flat | OL | Thread Size |
|---|---|---|---|
| 4-ECM | 5/8 | .75 | 9/16-18 |
| 8-ECM | 15/16 | .84 | 7/8-14 |
Shipping Caps
| Part Number | Hex Flat | OL | Thread Size |
|---|---|---|---|
| 4-EC | 3/4 | .62 | 9/16-18 |
| 8-EC | 11/16 | .75 | 7/8-14 |
Shipping Gaskets
| Part Number | OD | OW |
|---|---|---|
| GC-4-NIF-BL | .500 | .027 |
| GC-8-NIF-BL | .780 | .027 |
Contact [email protected] or call 800-638-5961 for current price and availability.