Description
Large hydraulic lines on excavators, presses and test rigs carry big tube nuts, and they rarely sit in open space. The Snap-on RTWH88Y flare nut head works a 1-3/8 in nut with a ratcheting 12-point ring. It mounts on a Y-shank (0.560 in) torque body. So a technician can run the nut down in short strokes, then finish on a calibrated wrench.
Part code: check it with Lost in HCM
The partner listing describes the RTWH88Y as a 1-3/8 in head on the Y shank. CAT1500i, meanwhile, prints the 1-3/8 in Y ratchet as the RTWH88YSL. Since the catalog shows no plain RTWH88Y, ask Lost in HCM to confirm which code it will ship. That check takes one email and keeps the right part on your shelf.
Big-nut work with the Snap-on RTWH88Y flare nut head
At this size, a tube nut may need many turns before it seats. A ratchet keeps the ring on the flats for every stroke, so nobody has to re-index the tool. In addition, the 12-point ring finds a new grip every 30 degrees, which helps behind a frame rail or a valve block. Then the final pull happens on the same body, with no tool change.
When a solid ring is the better finish
Snap-on prints no maximum torque for its ratcheting flare heads. For a firm final spec, CAT1500i lists the QYRX44A, a solid 12-point Y ring at 1-3/8 in. Unlike the ratchet, it carries a printed maximum working torque. The 6-point inch flare table, by contrast, stops at 1-1/8 in, so no 6-point head exists at this size. A sensible kit therefore pairs the ratchet for run-down with the solid ring for the last pull.
Reach to allow for on a Y wrench
Ratcheting Y heads in CAT1500i sit 4.43 in from pin to nut center, while solid Y rings sit at 3.00 in. Plan on that longer reach until Lost in HCM confirms the figure for this code. On a QC or QD body, ask for Snap-on’s setting method. On a ControlTech CTECH2Y100A, the stored head-length factor does the math for you.
Quote and code check for the Snap-on RTWH88Y flare nut head
SMK Vietnam shows this head for Lost in HCM, which supplies it and writes the price. List your Y body, the nut size and the final spec. Next, request a quote from Lost in HCM and ask them to confirm the code. Larger and smaller ratchets are in torque wrench heads and adaptors, and you can always contact SMK Vietnam.
1-3/8 in ratcheting ring FAQ
Which code should my purchase order use?
Ask Lost in HCM. CAT1500i lists the RTWH88YSL at this size, so they confirm the code before they quote.
Can I fit the RTWH88Y to an X-shank body?
No. It has a Y shank, so it needs a Y body such as the QC3P150 or the CTECH2Y100A.
Why use a ratchet on a 1-3/8 in nut?
Large nuts often need many turns in a tight bay. The ratchet keeps the ring on the flats, so the job goes faster with less risk of rounding.
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