100K 3/8" Coupling

An ultra-high-pressure connection fitting used to join compatible 3/8 inch waterjet tubing or plumbing components in 94K and 100K pressure circuits. It provides a secure cone-style sealing interface for high-pressure water delivery, helping maintain pressure integrity through pump, manifold, and cutting-head plumbing runs. This coupling is commonly replaced when threads, sealing seats, or tube connection surfaces show wear, galling, fretting, or leakage under pressure.

Related products:

• 100K 3/8 Inch Plug (012252-1) — used to cap unused 3/8 inch ports in 94K and 100K high-pressure circuits.
• 3/8 Inch Double Cone High-Pressure Insert (012952-1) — renews the cone-style sealing faces used in 3/8 inch high-pressure adapter and fitting connections.
• 87K 3/8 Inch Anti-Vibration Gland (A-2838) — clamps 3/8 inch OD tubing into compatible ultra-high-pressure ports and helps reduce vibration-related loosening.
• 87K 3/8 Inch Cross Without Fittings (014168-1) — provides a four-way 3/8 inch junction where couplings, plugs, tubing, and inserts may be used in high-pressure routing.
• 87K 3/8 Inch Cross Without Fittings Hexagon (049745-1) — another compact 3/8 inch high-pressure junction option for branching or connecting ultra-high-pressure lines.

Service tip: Always inspect the tubing cones, insert cones, glands, collars, and fitting seats before reassembly. Clean sealing surfaces and correct torque are critical for preventing weepage, cone fretting, and premature fitting damage in ultra-high-pressure plumbing.