Graco 100403 Plug Pipe 1/8-27 Nptf
$10.70
In Stock
The Graco 100403 Plug Pipe 1/8-27 NPTF securely seals unused or inspection ports in high-pressure systems, ensuring leak-free operation and system integrity.
- Thread Type: 1/8-27 NPTF (Dryseal)
- Function: Seals regulator, manifold, or pump body ports
- Material: Durable, corrosion-resistant metal
- OEM Quality: Designed for Graco industrial systems
Quantity
Genuine OEM Part
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Compatible Machines / Systems
- Any Graco equipment or assembly with a 1/8-27 NPTF (female) port that requires sealing with a pipe plug.
- Graco regulator and manifold blocks that list 100403 in their OEM parts diagrams.
- Industrial finishing components (manifolds, pump bodies, gauge ports) using 1/8-27 NPTF service/inspection ports.
- Service replacements on legacy Graco regulators and fluid sections where a Plug, Pipe 1/8-27 NPTF is specified.
What is Graco 100403 Plug Pipe 1/8-27 NPTF?
The Graco 100403 is a precision pipe plug used to seal unused or service ports in fluid and air circuits. With 1/8-27 NPTF threads, it provides a reliable, leak-resistant seal in high-pressure spray systems and regulator/manifold assemblies.
Key Specifications
| Part Number | 100403 |
|---|---|
| Part Name | Plug, Pipe 1/8-27 NPTF |
| Thread Type | NPTF (Dryseal), 1/8-27 |
| Function | Seals unused/inspection ports on regulators, manifolds, pump bodies, and gauge tees. |
| Typical Systems | Graco industrial finishing, airless application manifolds, regulator housings, and service blocks. |
Benefits
- Correct 1/8-27 NPTF thread for tight, leak-resistant sealing without thread deformation.
- Ideal for capping unused ports to maintain system pressure integrity and cleanliness.
- OEM part for consistent fit and dependable performance across compatible Graco assemblies.
Installation Notes
- Confirm port size and thread type (NPTF 1/8-27) before installation.
- Clean threads; apply a compatible sealant if specified by your manual (many NPTF joints seal without additional compound, but follow OEM guidance).
- Tighten to the torque recommended in your equipment manual to avoid thread damage.
Frequently Asked Questions
Check your OEM parts list for 100403 or verify that the unused port is 1/8-27 NPTF female. If either is true, this plug is a match.
No. NPTF (Dryseal) is designed to seal without sealant by thread interference. NPT often relies on sealant to achieve leak-tightness. Always match your port’s thread standard.
Many NPTF joints seal dry, but follow your equipment manual. If a sealant is specified, use a compatible product for the sprayed material and pressure rating.
On regulator housings, fluid manifolds, gauge ports, and pump body inspection/service ports that specify a Plug, Pipe 1/8-27 NPTF.
It can, provided the port is 1/8-27 NPTF and the material compatibility and pressure ratings meet your application requirements. For OEM Graco machines, use 100403 where specified.
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