Irwin IRW1907ZR Pipe Tap NPT tap pipe 1"

The Irwin IRW1907ZR is a pipe tap, NPT type, in 1 inch.

NPT means National Pipe Taper, and the taper is the whole design. The thread narrows along its length, so as a fitting is threaded in the flanks wedge progressively tighter and the joint seals on the threads themselves rather than on a gasket.

At 1 inch this is a substantial pipe tap and the torque required is worth anticipating. A tapered tap cuts an increasing engagement the whole way down — every turn is cutting more thread than the last — which means a 1 inch NPT tap demands considerably more force than a straight tap of the same nominal size. This is a tap for a proper tap wrench with real leverage, not a T-handle.

The depth you tap determines how far the fitting seats before it tightens, and there is no correcting it afterward. Too shallow and the fitting stands proud; too deep and it never grips.

Note that 1 inch is a nominal pipe size rather than a measurement — a 1 inch NPT thread measures around 1.3 inches across.

Use cutting fluid and back off regularly to clear chips. Thread sealant or PTFE tape remains standard practice.

Applications include plumbing, hydraulics, pneumatics, process piping, and machinery repair.

Brand

Irwin

SKU

IRW1907ZR

Category

Metal Working

Weight

0.12 lbs

Dimensions

11.00 x 2.50 x 0.75

Price

$68.00

Availability

In stock

Rating

4.17 / 5.0