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Vintage TRW United-Greenfield machinist hand tap set for cutting 3/8-24 NF internal threads. This set includes three high speed steel taps stored in the original TRW United-Greenfield blue tool box.

Tap markings visible include:

TRW

3/8-24 NF

GH3

HS

MADE IN USA

These vintage USA-made machinist taps are straight flute hand taps typically used with a tap wrench for manually cutting internal threads in metal.

TRW United-Greenfield cutting tools are well known in machining and toolmaking industries, and older USA manufactured Greenfield taps are highly regarded for durability and precision.

Original box label shows:

Part number 14193 5303

Size 3/8-24 NF H3

Great for machinists, metalworking shops, tool collectors, or anyone seeking vintage USA-made machine shop tools.

Please review all photos carefully for condition and markings.

Measurements

Tap length: approx 4 in

Thread size: 3/8-24 NF

Shank size: approx 3/8 in

SHIPPING & RETURNS

Ships via USPS Ground Advantage (or Priority Mail if item weight exceeds 1 lb)

Handling Time: 1 business day

Returns: 30-day return window; buyer pays return shipping