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The RIDGID 36890 OO-R die head is a made-in-USA alloy threading head with factory-set 1/2-inch 12R high-speed dies for clean 14 TPI NPT threads.
Pair withRIDGID 36895 12R Alloy Die Head with 3/4" NPT Dies$44.99
Categories : Tools & Hardware
SKU : WOR-TOO-822
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The RIDGID 36890 Model OO-R die head is the manual threading component that turns 1/2-inch pipe into clean, precise NPT threads. It ships with factory-set 12R high-speed dies, so there's no guesswork for alignment or depth. The die head is made in the USA and designed to work with RIDGID 00-R ratchet handles and RIDGID power drive threaders, making it a versatile pick for plumbers, pipefitters, and maintenance crews.
The OO-R die head is engineered around the 12R die set: right-hand cutting, 14 TPI, and a factory-set depth that produces standard NPT threads for mechanical and low-pressure piping. That means fewer rejected connections and less time chasing threads.
When the cutting edges finally wear down, you can replace the dies with RIDGID 12R 1/2-inch high-speed dies. Keeping a spare set of 12R dies on the truck means you can restore thread quality without replacing the whole die head.
The OO-R die head pairs with the RIDGID 00-R ratchet for manual threading in the field, or it mounts to RIDGID power drive machines for faster production threads. In both cases, the right-hand 14 TPI cutting action produces clean, standard NPT threads.
Factory-set 12R high-speed dies deliver clean 1/2-inch NPT threads
Made in USA alloy die head for durability in daily use
Fits RIDGID 00-R ratchet and RIDGID power drive threaders
Right-hand 14 TPI cutting action for standard NPT connections
Replacement 12R dies available to extend service life
Model: 36890
Origin: Made in USA
Series: OO-R
Material: Alloy steel head; high-speed steel dies
Die Model: 12R
Pipe Size: 1/2 in NPT
Product Type: Manual Die Head with 1/2-Inch Dies
Compatibility: RIDGID 00-R ratchet; RIDGID power drive threaders
Thread Direction: Right-hand
Seller: Workbench World
MPN: 36890
The RIDGID 36890 takes the guesswork out of hand threading. The factory-set 12R dies are aligned to produce the correct depth and taper for 1/2-inch NPT threads, so you get a consistent, seal-ready connection every time.
For service work in tight spaces, pair the OO-R die head with a RIDGID 00-R ratchet. The ratchet handle gives you controlled rotation while the die head guides the dies through the pipe.
When you're doing production runs, mount the same die head in a RIDGID power drive. The high-speed 12R dies are designed to handle machine threading speeds while keeping thread quality.
The 36890 uses RIDGID 12R 1/2-inch high-speed dies. Replace them with 12R dies to keep the same thread quality.
Yes, it pairs with the RIDGID 00-R ratchet for manual threading, and it also fits RIDGID power drive threaders.
It threads 1/2-inch nominal pipe with right-hand NPT threads at 14 TPI. For other sizes, use the matching RIDGID die head.
The 12R dies are factory-set, so alignment is taken care of. Just check that the die number matches the pipe size before threading.
Yes, the RIDGID 36890 is made in the USA.
I've been cutting pipe since the Nixon administration and this die head is the best I've used. The machined alloy feels solid in the hand, not like the cheap imports from overseas. The 12R dies are pre-set and sharp, so I can thread a half-inch pipe cleanly without fighting it. Even on galvanized pipe, the threads come out smooth and the die head doesn't bind. I appreciate that it's made in the USA. If you're a professional, don't waste your money on anything else. This is a tool your grandkids will inherit.
Works great, super clean threads.
This die head makes threading 1/2" pipe a breeze. Cuts nice and straight, and the 12R dies last. Fit my RIDGID cutter perfectly.
Used it on a rental job today. Threads came out great. Will buy another for the crew.
I've never threaded pipe before, but I watched a YouTube video and this die head made it easy. I only needed to do a few connections in my basement, and the threads look professional. Good quality tool for the price.
This is the real deal. It's built like a tank and cuts perfect threads. No complaints.
I don't buy many new tools, but this die head is a workhorse. The threads are clean and the head doesn't wobble. It's expensive but worth it.
I'm new to threading pipe and this made it easy. The dies are already set so it's foolproof. I messed up once but that was my fault. Would recommend to any novice.
On a big pipe fitting job, this die head really saves time. The 12R dies are sharp and the ratchet action is smooth. I can thread a 1/2 inch pipe in under a minute. It fits my RIDGID 12-R ratchet perfectly. The head is a bit heavy, but that's a good thing. I'm ordering a second one for my apprentice to use.
I've used this on copper and steel. Threads are good on steel, but on copper it tends to gall. Maybe it's because I didn't use oil. It's a well-made tool, but be sure to use cutting oil. Other than that, it's fine.
