Description
The Snap-on QJRXSM11A flare nut head fits a slotted 11 mm 6-point ring to a J-shank interchangeable torque wrench. So you can torque a small tube nut without taking the line apart. Snap-on rates the head at 42 ft-lb, or about 57 N·m, and no Y-shank head shares its size.
What Snap-on prints for the 11 mm QJRXSM11A
| Item | Value |
|---|---|
| Size | 11 mm, 6-point, slotted ring |
| Shank | J (0.425 in) |
| Maximum recommended working torque | 42 ft-lb (UK brochure: 500 in-lb), about 57 N·m |
| O.D. | 21 mm |
| Head depth | 9 mm |
| Fastener center to retaining pin | 2.50 in (QJRXSM series) |
The US catalog and the UK torque brochure agree on these figures for the QJRXSM11A. Still, ask Lost in HCM to confirm them in your quote.
Which J body suits a 42 ft-lb head
The shank decides fit, while the body’s range decides how useful the pair will be. Snap-on’s CAT1500i lists several J bodies, for example:
- QD2IN50A, 10-50 N·m: it stops below the head’s 57 N·m limit, so it covers only the lighter settings.
- QD2IN100A, 20-100 N·m: it spans the whole head rating, although you must stop at 42 ft-lb.
- QC2P75 preset, 5-75 ft-lb: it suits a station that tightens one 11 mm nut value all shift.
- CTECH1J240A ControlTech, 1.4-27.2 N·m: it fits light fittings only, because its scale ends far below the head limit.
In every case, set the body at or below 42 ft-lb while the QJRXSM11A sits on it.
No Y-shank twin at 11 mm
Neither Snap-on document lists a Y-shank 11 mm metric flare head. Therefore a bench that runs only Y bodies needs one J body for the QJRXSM11A. In practice, many shops keep a light J body for small line nuts and a Y body for larger fittings.
Sizes either side of the Snap-on QJRXSM11A flare nut head
A 6-point ring must fit snugly, so measure the nut rather than guess. The QJRXSM10A sits one size down at 33 ft-lb, with an 8 mm head depth. Meanwhile, the QJRXSM12A sits one size up at 50 ft-lb and keeps the 9 mm depth. Also clean paint and scale off the nut first, because debris can stop the ring from seating fully.
Good habits with an 11 mm slotted ring
The slot lets the ring pass over the tube, yet it also makes the ring weaker than a closed box. So seat the Snap-on QJRXSM11A flare nut head fully and keep the wrench square to the nut. Then pull smoothly through the click. Snap-on also warns against using its torque bodies to break fasteners loose, so free stuck nuts with a plain line wrench first.
Buying the Snap-on QJRXSM11A flare nut head through Lost in HCM
SMK Vietnam shows this head in its catalog, yet Lost in HCM handles supply and pricing. Note the body model you use and the nut torque spec. When you have those, ask Lost in HCM to quote the QJRXSM11A. You can browse more torque wrench heads and adaptors and J bodies under torque wrenches, or contact SMK Vietnam.
Quick answers on the 11 mm J flare head
What is the highest setting I can use with the QJRXSM11A?
Snap-on lists 42 ft-lb, which is about 57 N·m. Set the wrench at or below that value.
Does an 11 mm Y-shank flare head exist?
Not in the Snap-on catalog or the UK brochure. So the QJRXSM11A needs a J-shank body.
Will the QD2IN50A reach the head’s limit?
No. Its 50 N·m top end sits below 57 N·m, so the QD2IN100A covers more of the rating.
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