Description
Brass tube nuts round off easily, and a 12-point ring can make that worse once the corners wear. A 6-point head pushes on the middle of each flat instead. The Snap-on QJRXS26A flare nut head brings that grip to a 13/16 in nut on a J-shank body. As a result, it suits service work where nuts have seen many cycles.
QJRXS26A: what the catalog confirms
| Opening | 13/16 in, 6-point, slotted |
|---|---|
| Shank | J (0.425 in) |
| Outside diameter | 1-5/16 in |
| Pin to fastener center | 2.50 in (QJRXS series) |
Snap-on’s US catalog, the UK brochure and the Lost in HCM listing all agree on the size and the outside diameter.
Six points, twelve points or a ratchet at 13/16 in
- QJRXS26A, solid 6-point, J: best grip on soft, painted or worn nuts.
- QYRXS26A, solid 6-point, Y: same grip, rated at 117 ft-lb for firmer joints.
- QYRX26A, solid 12-point, Y: easier to place in tight swing arcs, also 117 ft-lb.
- RTWH52JSL, ratcheting 12-point, J: fastest on clean nuts that need many turns.
So the Snap-on QJRXS26A flare nut head fits jobs where the nut matters more than the speed.
Typical 13/16 in tube nuts
Many -6 O-ring face seal nuts for 3/8 in tube use a 13/16 in hex. Some 3/8 in refrigerant flare nuts do as well, while others use 7/8 in. Therefore, measure the hex with a caliper before you order. Also check the slot width against the tube, since the head must pass over it.
J bodies and the head limit
J bodies such as the QC2I75 (5-75 ft-lb) and the QD2IN100A (16.6-71.9 ft-lb) take this head. In addition, the QD body needs no length math, because this head keeps the 2.50 in standard spacing. However, Snap-on’s documents do not agree on its maximum rating. For that reason, confirm the limit with Lost in HCM, or choose the Y-shank QYRXS26A for firm specs.
Keeping the 6-point flats sharp
Inspect the six contact flats under good light before each job. Then wipe off oil, because a slick head can slip on brass. Store the QJRXS26A in a dry tray away from heavier heads.
Requesting the Snap-on QJRXS26A flare nut head
Lost in HCM supplies the QJRXS26A, and SMK Vietnam features it as a partner product. Add your J body model and the nut spec to your message. Then request a QJRXS26A quote from Lost in HCM. Our torque wrench heads and adaptors category shows related sizes, or you can contact SMK Vietnam.
QJRXS26A buyer questions
Why choose 6 points over 12 at this size?
Six points spread the load across the flats, so worn or soft nuts slip less.
What does the Y version add?
The QYRXS26A carries a 117 ft-lb rating on the larger Y shank, so it suits firmer joints.
Is the head depth listed?
Snap-on sources give different depths for this head. So check clearance on the part, or ask Lost in HCM.
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