Description
Small inch tube nuts round off quickly under an open-end wrench. The Snap-on QJRXS14A flare nut head avoids that with a slotted 6-point ring that wraps a 7/16 in hex. It locks into J-shank (0.425 in) torque bodies. Snap-on rates it at 42 ft-lb, about 57 N·m, so it covers most light line work with margin.
Rating and size of the Snap-on QJRXS14A flare nut head
CAT1500i, the UK torque brochure and the partner listing agree on this ring. CAT1500i and the listing print 42 ft-lb, while the brochure prints 500 in-lb. Those two figures match within rounding. The outside diameter is 27/32 in, and all three sources agree on it. QJRXS heads also sit 2.50 in from the retaining pin to the fastener center.
J bodies matched to 42 ft-lb
| J body | Range | Fit with the QJRXS14A |
|---|---|---|
| QD2IN50A | 10-50 N·m (9.2-35.0 ft-lb) | Whole scale under the limit |
| QC1I200 | 40-200 in-lb | Whole scale under the limit |
| CTECH1J240A | 12-240 in-lb | Whole scale under the limit; electronic |
| QC2I75 | 5-75 ft-lb | Cap at 42 ft-lb |
| QD2IN100A | 20-100 N·m | Cap at 57 N·m |
So the QD2IN50A is the simplest partner, because no setting on it can exceed the ring limit. Meanwhile, a QC2I75 needs a written cap on the job card.
No Y twin for the QJRXS14A
In CAT1500i, the Y column of the 6-point inch table stays empty at 7/16 in. The brochure shows the same gap. Thus the QJRXS14A is the only fixed 7/16 in flare ring Snap-on lists. Its ratchet list also offers only a J head at this size, the RTWH28JSL. In practice, most 7/16 in joints suit a light J body anyway.
Gauge lines and the Snap-on QJRXS14A flare nut head
Small 45-degree flare nuts on 1/8 in tube often carry a 7/16 in hex. They appear on gauge lines, sensor feeds and pilot circuits inside machine cabinets. Those brass nuts sit close together, so an open-end wrench can slip and mark them. The QJRXS14A slides over the tube and seats on six flats instead. Then a light J body pulls the nut to the instrument maker’s value. Measure first, because hex sizes vary between makers.
Metric neighbor of the QJRXS14A: 11 mm
7/16 in equals 11.11 mm, close to an 11 mm hex but not the same. For metric nuts, Snap-on lists the QJRXSM11A, also at 42 ft-lb, with a 21 mm O.D. So keep the QJRXS14A for inch fittings and order the metric ring for 11 mm work.
Placing a QJRXS14A request
SMK Vietnam lists the QJRXS14A for Lost in HCM, which supplies the head and returns the price. Note your J body and the line value in the request. Once you have both, ask Lost in HCM for a QJRXS14A quote. More J rings sit under torque wrench heads and adaptors, and contact SMK Vietnam is open for fit questions.
Light-line FAQ for the QJRXS14A
Can a QC2I75 exceed the QJRXS14A limit?
Yes. Its scale reaches 75 ft-lb, so lock the setting at or below 42 ft-lb.
Is the QJRXS14A gentler on brass nuts than an open-end head?
In general, yes. It touches all six flats, so it spreads the load instead of loading two corners.
What clearance should I leave for the QJRXS14A?
Plan on roughly 27/64 in of clearance around the nut center, half of its 27/32 in O.D.
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