Unified Coarse Thread Hand Taps – 3-Piece Set

Keep your ship's machinery running with the Unified Coarse Thread (UNC) Hand Taps 3's Set. Designed for marine engineers and shipboard repair teams, these precision-ground taps cut clean threads in steel, stainless steel, and non-ferrous metals, perfect for restoring damaged bolt holes in engine components, deck fittings, and piping flanges.

Each set contains three essential taps: a taper tap for starting threads, a plug tap for general threading, and a bottoming tap for cutting full threads to the bottom of a blind hole. Manufactured from durable high-speed steel, the taps remain sharp even in tough marine environments where saltwater and humidity are a constant challenge.

Key Features

Technical Specifications

SpecificationDetails
Set Contents3 Hand Taps (Taper, Plug, Bottoming)
Thread TypeUnified Coarse (UNC)
MaterialHigh-Speed Steel (HSS)
Shank TypeSquare drive (for tap wrenches)
Surface FinishOxide or bright finish
ApplicationMarine repair, engine maintenance, thread cutting
StandardsANSI / ASME

Frequently Asked Questions

What is the difference between taper, plug, and bottoming taps?

A taper tap has a gradual cutting chamfer to start threads easily, a plug tap has a shorter chamfer for general threading, and a bottoming tap has a nearly flat chamfer to cut threads to the bottom of a blind hole.

Can these hand taps be used for cutting threads in stainless steel?

Yes, the high-speed steel construction is suitable for stainless steel and other common marine metals. Always use a cutting or tapping fluid to reduce friction and extend tap life.

What sizes are available in this set?

Our UNC hand tap sets come in a range of standard sizes. Please contact our sales team to confirm availability for the specific size you require.

Do I need a special wrench to use these taps?

No, the square drive shank fits standard multi-size tap wrenches commonly found on ships and in machine shops.

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