Graco 100403 Plug Pipe 1/8-27 Nptf

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

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