Description
A 16 mm tube nut on a hydraulic or coolant line needs a tool that grips flats, not corners. The Snap-on QJRXSM16A flare nut head does that with a slotted 6-point ring that slips over the tube. Its J shank fits light interchangeable bodies, which suit the moderate values many line fittings need.
What Snap-on confirms for the QJRXSM16A
- Size: 16 mm, 6-point, slotted flare nut ring.
- Shank: J (0.425 in).
- Head depth: 11 mm.
- Fastener center to retaining pin: 2.50 in (QJRXSM series).
Snap-on’s US catalog and its UK torque brochure print different maximum torque values for this J head. So we do not quote one here. Ask Lost in HCM to confirm the limit in writing before you set the wrench.
When the Y-shank twin is the better buy
The QYRXSM16A is the same 16 mm head as the QJRXSM16A, but on a Y (0.560 in) shank. Moreover, both Snap-on documents give it 75 ft-lb, about 102 N·m. Its pin-to-fastener length grows to 3.00 in, however, so it needs a Y body. Pick the Y twin when your spec sits high for a J head, or when your bench already runs Y bodies.
Sizes around 16 mm
The J metric flare heads step one millimeter at a time in this part of the table. For instance, the QJRXSM15A sits below the Snap-on QJRXSM16A flare nut head, and the QJRXSM17A sits above it. Because a 6-point ring must fit snugly, measure the nut instead of guessing between 16 and 17 mm. Also clean off paint, which can stop a snug ring from seating.
Clearance with the Snap-on QJRXSM16A flare nut head
Head depth is the ring’s thickness along the nut axis. So at 11 mm, the QJRXSM16A can work on fittings that sit close to a block face or a bracket. For example, crowded manifolds often leave little room above each nut. Then the slot lets the head pass over the tube itself.
Handling a slotted ring
A slot weakens any ring, so treat the QJRXSM16A with care. Seat it fully, keep the wrench square, and pull smoothly through the click. Also avoid using it to free a stuck fitting. In addition, recalibrate the body on a regular plan.
Ordering the Snap-on QJRXSM16A flare nut head
Lost in HCM supplies the head and prepares the quote, while SMK Vietnam lists it. Send your body model and the tube nut torque. Then request a QJRXSM16A quote from Lost in HCM. Other heads are under torque wrench heads and adaptors and J bodies under torque wrenches, or you can contact SMK Vietnam.
QJRXSM16A buyer FAQ
Why is no torque limit shown for the QJRXSM16A?
Snap-on’s US and UK documents disagree on it. So ask Lost in HCM to state the current figure in your quote.
How deep is the 16 mm flare nut head?
Snap-on lists an 11 mm head depth, which helps near block faces and brackets.
Which 16 mm version takes more torque?
The Y-shank QYRXSM16A, which Snap-on rates at 75 ft-lb.
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