Home Pipe Threader Die & Die Head Finder

Threading attachment compatibility

Pipe Threader Die & Die Head Finder

Start with the power drive or threading machine you own, then match the die-head family, pipe size, NPT or BSPT thread standard and material to a documented setup. The finder also shows exact catalog or SKU numbers where current manufacturer documentation supports them.

Why this is separate from the Pipe Threader Finder

The Pipe Threader Finder helps choose the drive or machine. This page answers the next question: which head fits that drive, which dies belong in that head, and is an adapter required?

Last technical verification: August 25, 2026. See how compatibility statuses are verified. For die-family background, see Pipe Threader Dies & Die Heads.

Interactive compatibility finder

Match your machine, die head and dies

Results appear automatically after you select the threader, pipe size and thread standard. Selecting a die head you already own checks that exact combination instead of simply recommending a new head.

Pipe threader / threading machine Die head you already own If you choose a head, the finder evaluates that exact machine/head relationship before suggesting part numbers. Nominal pipe / conduit size Thread standard The same nominal pipe size does not make NPT and BSPT die sets interchangeable. Material / application Material changes the recommended die type. Stainless results are deliberately limited to combinations with explicit manufacturer support.

Results update automatically as selections change.

What the finder checks before it shows a setup

A pipe threader, die head and die set are three separate compatibility layers. The drive has to accept the head family. The head has to cover the selected pipe size and thread form. The installed dies then have to match that head, thread standard and material.

That is why a result does not stop at “12-R fits.” For a RIDGID 700, for example, 12-R is the direct head family, while a smaller 11-R head uses RIDGID's documented 772 adapter. On a RIDGID 300 or 535, the normal path is not a portable 12-R head at all; those machines use machine die heads such as the 811A or 815A with universal die sets.

When a cross-brand relationship is explicitly documented, the finder can show it. Milwaukee's full-size forged-aluminum die heads are documented for the Milwaukee 2874, RIDGID 700 and DEWALT DCE700. Milwaukee also publishes replacement NPT dies as replacements for several Milwaukee, RIDGID, DEWALT and other portable head families. A documented cross-brand path is still not permission to mix thread forms or use a die on a material the manufacturer does not support.

Main die-head families in the current finder

Die-head family	Current verified drive / machine path	Size range in this finder	Thread standards	Important distinction
RIDGID 12-R	RIDGID 700 direct; Milwaukee 2874 and DEWALT DCE700 documented compatible	1/8–2 in.	NPT, BSPT	Do not confuse 12-R with the smaller 11-R power-drive family.
RIDGID 11-R	RIDGID 600-I and 690-I; RIDGID 700 with documented adapter path in the smaller range	1/8–2 in. by drive	NPT, BSPT	600-I stops at 1-1/4 in.; 690-I carries the family through 2 in.
Milwaukee full-size forged aluminum	Milwaukee 2874, RIDGID 700, DEWALT DCE700	1/2–2 in.	NPT in current U.S. coverage	Available with alloy or high-speed dies; high-speed dies are documented for stainless.
Milwaukee compact forged aluminum	Milwaukee 2870 and RIDGID 600-I	1/2–1-1/4 in.	NPT in current U.S. coverage	Compact head family, not the full-size 2-inch head.
DEWALT DCE700 die heads	DEWALT DCE700 and RIDGID 700	1/2–2 in.	NPT	Heads ship with corresponding high-speed steel dies; replacement dies are size-specific.
RIDGID 811A / 815A	RIDGID 300 and 535 machine platforms	1/8–2 in.	NPT, BSPT	Machine universal heads use grouped universal die sets rather than one portable drop head per pipe size.
RIDGID 816 / 817	RIDGID 535	816: 1/8–3/4 in.; 817: 1–2 in.	NPT in current finder coverage	Semi-automatic split-size machine heads.

Die head vs. dies: the part-number difference matters

A complete portable die head normally includes a die set. Replacement dies are the four cutting pieces installed inside that head. The two numbers are not interchangeable. For example, RIDGID catalog 37400 identifies a 1-inch alloy NPT 12-R complete die head, while catalog 37835 is the 1-inch alloy NPT replacement die set used in compatible manual/drop-head families.

Machine heads work differently. An 811A or 815A adjusts across a range and uses grouped universal dies. RIDGID catalog 47745 covers 1/2- and 3/4-inch alloy NPT dies for universal machine heads; catalog 47750 covers the 1- through 2-inch group. Stainless-specific machine dies have separate numbers. This is why buying by pipe size alone can lead to the wrong component.

Four checks before ordering replacement dies

1. Confirm the head family

12-R, 11-R and machine universal heads can all cover common NPT sizes, but that does not make their complete heads interchangeable. Start with the drive or machine and exact head family.

2. Match the thread form

RIDGID publishes separate NPT and BSPT heads and die sets. A nominal 1-inch size does not make an NPT die the correct cutter for a 1-inch BSPT requirement.

3. Match the material

For stainless steel, use a die explicitly supported for stainless. RIDGID publishes stainless-specific high-speed NPT dies, while Milwaukee states its high-speed portable dies can thread stainless.

4. Verify the exact catalog number

Size labels are easy to misread, especially around grouped machine dies. Use the current manufacturer catalog number and instructions before ordering or installing the set.

12-R, 11-R and machine universal are different buying decisions

RIDGID 12-R is the central full-size portable family in this coverage. It is the direct head family for the RIDGID 700, and current Milwaukee and DEWALT documentation explicitly connects their full-size cordless threaders to the 12-R ecosystem. That makes 12-R especially important when a contractor already owns a collection of 1/2- through 2-inch heads.

For a size-by-size list of common NPT complete-head and replacement-die catalog numbers, see the RIDGID 12-R Dies & Die Heads guide.

RIDGID 11-R is the direct family for the 600-I and 690-I. The 600-I is the smaller 1-1/4-inch drive. The 690-I goes through 2 inches and changes how the larger heads are retained. The RIDGID 700 can use the smaller 11-R range through its 772 adapter, but that is an adapter path rather than a reason to treat 11-R as a 12-R substitute.

Machine universal heads such as 811A and 815A belong to carriage-based threading machines. They use adjustable head geometry and grouped universal die sets. If you own a RIDGID 300 or 535, starting your search with “which 12-R head do I need?” is usually the wrong question; start with the machine die-head family instead.

Manufacturer source set used by this finder

The current database is intentionally limited to relationships and part numbers that can be traced to manufacturer documentation.

RIDGID Hand Threader Die Heads — 12-R and 11-R NPT/BSPT complete-head catalog numbers.
RIDGID Manual Threader Pipe & Bolt Dies — replacement die sets for 11-R, 12-R and related manual/drop-head families, including stainless-specific NPT dies.
RIDGID 700 Power Drive — direct 12-R use and adapters 770/771/772/773 for other RIDGID head families.
RIDGID 600-I and RIDGID 690-I — 11-R power-drive capacities.
RIDGID Optional Machine Die Heads — 811A, 815A, 816 and 817 capacities and opening styles.
RIDGID Pipe & Bolt Dies for Machine Die Heads — universal NPT/BSPT and stainless-specific machine die numbers.
Milwaukee full-size forged-aluminum die heads and Milwaukee Compact die heads — documented drive compatibility and current SKUs.
Milwaukee Portable Pipe Threading Dies — current replacement-die SKUs and cross-family replacement claims.
DEWALT Pipe Threading & Deburring Tools — DCE700 head and replacement-die SKUs.

Part number does not replace setup verification.

Before threading, confirm the current manufacturer instructions for the exact power drive or machine, die head, die set, thread direction, pipe material, cutting oil, support arm or pipe restraint, and required thread standard.

Pipe threader die & die head FAQs

Are RIDGID 11-R and 12-R die heads interchangeable?

No. They are different die-head families. RIDGID 600-I and 690-I power drives use 11-R heads, while the RIDGID 700 directly uses 12-R heads. The RIDGID 700 can use 11-R heads in the documented smaller-size range with the specified 772 adapter. Always match the power drive, head family and size.

Can RIDGID 12-R die heads be used on Milwaukee and DEWALT cordless threaders?

Yes for the documented full-size systems. Milwaukee documents RIDGID 12-R compatibility for its 2874 M18 FUEL 2-inch Pipe Threader, and DEWALT documents the DCE700 as compatible with RIDGID 12-R-style die heads. Verify the exact size, thread standard and installed dies before use.

Can Milwaukee replacement dies be installed in RIDGID 11-R or 12-R heads?

Milwaukee states that its portable NPT replacement die sets are replacements for several head families including RIDGID 11-R and 12-R. The die size, NPT thread form, direction and material suitability still have to match the job and the die head.

Can I install NPT dies in a BSPT die head?

Do not treat NPT and BSPT dies as interchangeable. RIDGID publishes separate NPT and BSPT die heads and separate die-set catalog numbers. Select the head and dies for the required thread standard.

What dies should I use for stainless steel pipe?

Use the die material and catalog number the manufacturer specifies for stainless work. RIDGID publishes stainless-specific high-speed NPT die sets for manual and machine universal heads, and Milwaukee states that its high-speed portable dies can thread stainless steel. Do not infer stainless suitability merely because a die is labeled high speed.

Which RIDGID machine die heads use universal die sets?

RIDGID lists universal die sets for machine heads including 811A, 815A, 816 and 817. The 811A and 815A cover 1/8 through 2 inches; the 816 covers 1/8 through 3/4 inch and the 817 covers 1 through 2 inches. NPT and BSPT configurations use different heads and die sets.

Continue with Pipe Trades Tools

Home · Pipe Threader Finder · DEWALT DCE700 · RIDGID 12-R · Threader Dies · How We Verify · Recommended Tools