Snap-on RTWH72Y Flare Nut Head, 1-1/8″ Ratcheting 12-Point, Y Shank (0.560″)

Description

A 1-1/8 in tube nut on a cramped manifold can take a long time with an open-end wrench. Each flip of the wrench costs time, and the open jaw can spread on a firm nut. The Snap-on RTWH72Y flare nut head avoids both problems. It wraps the nut with a 12-point ring, passes the tube through its slot, and ratchets for the next stroke.

RTWH72Y at a glance

Nuts that need a 1-1/8 in ring

A -10 O-ring face seal nut for 5/8 in tube often measures 1-1/8 in. Many 5/8 in refrigerant flare nuts use this hex too, although some makers go to 1-1/4 in. In addition, a standard 3/4 in hex nut measures 1-1/8 in across flats. So the Snap-on RTWH72Y flare nut head can serve several jobs, but only after you measure the actual nut.

How to pick between neighbors

• First, measure the nut across flats with a caliper.
• A 1-1/16 in reading calls for the RTWH68YSL instead.
• For a 1-1/4 in nut, step up to the RTWH80YSL.
• When the joint needs a high, rated torque, look at a solid head next.

Snap-on lists solid 1-1/8 in heads as well, such as the 12-point QYRX36A and the 6-point QYRXS36A. They grip harder and keep the shorter 3.00 in spacing. However, they cannot ratchet, so they suit fewer tight spots.

Y bodies and the 4.43 in reach

• CTECH2Y100A ControlTech, 5-100 ft-lb, which applies a head-length factor for you.
• QD3IN200B dual range, 40-200 N·m.
• QC3P200 preset, 40-200 ft-lb.

Because the RTWH72Y sits 1.43 in farther out than a standard Y head, click bodies need a correction. Therefore, ask Lost in HCM or Snap-on how to set a QD or QC body for it.

Looking after the RTWH72Y

Hydraulic oil and grit wear a ratchet fast. So wipe the head after each job and blow out the mechanism with dry air. Also check the ring slot for spread or burrs before you fit it to a soft nut.

Quote for the Snap-on RTWH72Y flare nut head

SMK Vietnam lists the RTWH72Y on behalf of Lost in HCM, the supplier that prepares every quote. Mention your Y body and the joint spec in the request. Then get an RTWH72Y quote from Lost in HCM. Other sizes appear under torque wrench heads and adaptors, and you can contact SMK Vietnam any time.

RTWH72Y FAQ

Does the RTWH72Y suit 5/8 in refrigerant lines?

Often, because many 5/8 in flare nuts use a 1-1/8 in hex. Some use 1-1/4 in, so check the nut.

Is a J-shank version available?

No. Snap-on’s J ratcheting heads stop at 7/8 in, so this size needs a Y body.

Why is no torque limit shown?

Snap-on’s catalog gives no rating for ratcheting flare nut heads. Lost in HCM can check it for you.