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Aluminium and brass short shank fire hose coupling plug, sandblast finish, NPSM threads

Value Brand

Value Brand 3LZ18 Short Shank Fire Hose Coupling Plug NPSMxNPSM

SKU CH-579Q-7BMSJ

shank fire hose coupling plug with NPSM x NPSM threads and swivel pin-lug connection

  • Swivel plug design allows quick hose alignment
  • Pin lug tightening gives secure tool-free connection
  • Aluminium and brass construction resists corrosion
  • Dual NPSM threads fit standard 3-inch fire hose
  • Prop 65 notice confirms regulated material disclosure

Product Identity

The Value Brand 3LZ18 Short Shank Fire Hose Coupling Plug connects two three‑inch NPSM threads using a pin‑lug swivel design. It suits fire‑protection crews and industrial maintenance teams who need a quick‑connect aluminum and brass fitting for standard hose lines.

Thermals Noise Power

This mechanical coupling has no electrical or moving parts, so it produces no heat, noise or power draw during normal service. Pressure and flow performance depend entirely on the connected hose and pump system.

Deciding Specification

The defining detail is the three‑inch NPSM‑by‑NPSM thread pair with pin‑lug tightening, which only matches hose and equipment built to that exact thread standard. Buyers needing a different thread type, size or locking method cannot use this plug.

How it compares

Measured against everything we stock in Air Compressor Parts & Inflators, at today’s prices. Recalculated every night.

Price $23.99
Cheaper than about 72% of the 113 comparable items (median $51.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

How do I install the 3-inch NPSM short-shank coupling with pin lugs and avoid the common mistake of cross-threading the swivel?

Thread the male NPSM end into the female hose fitting by hand until the threads engage smoothly, then tighten the pin lugs evenly with a spanner; forcing the swivel before the threads seat is the step most users get wrong.

What maintenance or replacement will the aluminium and brass short-shank coupling need over time?

Inspect the sandblast finish and pin lugs for corrosion or wear each season; replace the coupling if the aluminium body shows pitting, the brass threads gall, or the swivel action becomes stiff.

What limit appears first when the 3-inch NPSM plug runs under sustained pressure?

The aluminium body and brass threads reach their mechanical stress limit before the NPSM seal fails, so monitor for deformation or thread galling during continuous high-pressure use.

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