SprayTech part 138597 is a 3/8-18 NPSM cap used to seal the ends of hose assemblies and fluid ports. This protective fitting prevents contamination, fluid leakage, and damage to internal threads when a hose is not connected. Installing this cap helps maintain system cleanliness and preserves thread integrity on compatible SprayTech hose systems.
| Part Number | 138597 |
|---|---|
| Part Description | Cap 3/8-18 NPSM |
| Brand | SprayTech |
| Fits | Helix Hose Series |
| Condition | New |
The SprayTech 138597 Cap is a 3/8-18 NPSM (National Pipe Straight Mechanical) threaded protective fitting. On compatible Helix hose systems, this cap is used to seal open hose ends, pump ports, or manifold connections to prevent the ingress of dirt, dust, and moisture when the system is inactive or during storage.
Leaving threads exposed can lead to contamination that causes valve clogs, premature seal wear, and difficult connections. Using this cap protects critical threads, maintains system cleanliness, and helps ensure a proper seal when the hose is put back into service.
| Contamination barrier | Seals out dirt, debris, and moisture from internal threads and passages |
|---|---|
| Thread protection | Helps prevent nicks, dents, or corrosion on precision threads |
| Leak prevention | Contains residual fluid in a disconnected hose to prevent spills |
| Damage or cracks | Cap is cracked, split, or shows signs of physical damage |
|---|---|
| Stripped threads | Threads inside the cap are worn or cross-threaded, preventing a tight seal |
| Lost or missing | Original cap has been lost, leaving ports or hose ends unprotected |
| Poor fit | Cap does not screw on smoothly or feels loose on the connection |
SprayTech part 138597 is compatible with the following SprayTech Helix series hose systems. It fits standard 3/8-18 NPSM female ports.
| SprayTech Model | Component |
|---|---|
| Helix FR, VR Heated Hose | 3/8-18 NPSM port cap |
| Helix FR | 3/8-18 NPSM port cap |
| Helix VR | 3/8-18 NPSM port cap |
Caps are small but essential parts of a hose management system. They are often used alongside other fittings and maintenance items.
Used to seal male threaded ends. Plugs and caps are often kept together as a set for complete port protection.
Larger protective covers or sleeves used to shield the entire hose end assembly during transport and storage.
The functional fittings that connect the hose; their threads are protected by caps when not in use.
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