Description
Large hydraulic hoses and tubes end in big swivel nuts, and those nuts often sit deep among other lines. The Snap-on RTWH80YSL flare nut head reaches a 1-1/4 in nut through its side slot, then ratchets in place. So a fitter can bring the joint to torque in a short arc, one stroke after another.
RTWH80YSL catalog entry
| Size | 1-1/4 in |
|---|---|
| Type | Ratcheting flare nut head, 12-point |
| Shank | Y (0.560 in) |
| Fastener center to retaining pin | 4.43 in (RTWHY heads) |
| Nearest sizes | RTWH72YSL (1-1/8 in), RTWH88YSL (1-3/8 in) |
Sizing a 1-1/4 in tube nut
Measure the nut across its flats, not the tube or the thread. Large fittings often look alike, yet one size step changes the head. Snap-on’s Y range brackets the RTWH80YSL with the 1-1/8 in and 1-3/8 in models above. If your nuts measure in millimeters, ask Lost in HCM about metric sizes. Snap-on notes that it makes them on special order.
Setting a Y body for the Snap-on RTWH80YSL flare nut head
RTWHY heads place the nut 4.43 in from the pin, while standard Y heads use 3.00 in. As a result, the nut sees more torque than a click scale shows. Snap-on’s catalog prints no click-body correction, so get guidance before you set the QD3IN200B, QC3P150 or QC3P200. A ControlTech body such as the CTECH2Y100A avoids that step, because it holds a factor for head length. The CTLNK2Y100 also adds a stored torque record for audits.
Ratchet or solid ring at this size?
Snap-on’s QYRX series offers solid 12-point flare nut heads, and those keep the 3.00 in Y spacing. That makes setup simpler. The ratchet, on the other hand, pays off when the handle can swing only a few degrees between hoses. In short, pick the RTWH80YSL when access is the problem, and a solid head when setup time matters more.
Jobs for the Snap-on RTWH80YSL flare nut head
- Pump outlet and manifold fittings on plant hydraulic units.
- Boom and track lines on excavators and cranes.
- Main lube and fuel lines on marine and power-plant engines.
Sourcing the RTWH80YSL
Lost in HCM supplies the Snap-on RTWH80YSL flare nut head and prepares quotes, while SMK Vietnam lists it as a partner item. Tell Lost in HCM which Y body you use, so it can help with setup. Then send Lost in HCM a quote request for the RTWH80YSL. Other heads sit in our torque wrench heads and adaptors range, and you can contact SMK Vietnam at any time.
Buyers ask about the RTWH80YSL
Does Snap-on make a J version at 1-1/4 in?
No. The J ratcheting range stops at 7/8 in, so this size needs a Y body.
Does it meet an aviation tooling spec?
Snap-on’s data sheet states that it makes this head in compliance with Boeing ST2599. Check your own tooling list as well.
Why not set a click body by its scale?
The 4.43 in head length adds leverage, so the scale reads low. Ask for setup guidance first.
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