Description
The Snap-on QJRXSM8A flare nut head is the smallest size in Snap-on’s metric 6-point flare nut chart. It fits an 8 mm slotted ring to a J-shank interchangeable torque wrench. Because its limit is low, the body you pair it with matters more than usual.
QJRXSM8A figures in CAT1500i and the UK brochure
| Item | Value |
|---|---|
| Size | 8 mm, 6-point, slotted ring |
| Shank | J (0.425 in) |
| Maximum recommended working torque | 17 ft-lb (CAT1500i); 200 in-lb (UK brochure); about 23 N·m |
| O.D. | 17 mm |
| Head depth | 7 mm |
| Fastener center to retaining pin | 2.50 in (QJRXSM series) |
The two documents agree, since 200 in-lb works out to about 16.7 ft-lb. Neither one lists a Y-shank head at 8 mm.
A light J body for the Snap-on QJRXSM8A flare nut head
Many J bodies reach well past this head’s limit. For example, the QC2I75 runs to 75 ft-lb, so most of its scale stays off limits. A lighter body makes a better partner:
- QC1I200 adjustable, 40-200 in-lb: its top setting equals the head’s 200 in-lb rating.
- CTECH1J240A ControlTech, 1.4-27.2 N·m: the scale ends just above the 23 N·m limit.
- QC1P300 preset, 6.8-33.9 N·m: it suits one fixed value, set at or below 23 N·m.
With any of them, keep the setting at or below 17 ft-lb while the QJRXSM8A sits on the body.
The step up to 9 mm
The QJRXSM9A sits one size up, rated at 25 ft-lb, with an 18 mm O.D. and the same 7 mm depth. Even so, a 6-point ring must match the nut exactly. So gauge each nut before you order the QJRXSM8A, since a loose ring rounds the corners.
Working with the 8 mm QJRXSM8A
Slide the slot over the tube, then lower the ring onto the nut until it sits flat. Next, pull the handle smoothly and stop at the signal. Small nuts strip easily, and Snap-on warns against breaking fasteners loose with its torque bodies. Instead, free a stuck fitting with a plain line wrench, then torque it with the head.
Lost in HCM quotes for the Snap-on QJRXSM8A flare nut head
Lost in HCM supplies the QJRXSM8A and sends the quote, while SMK Vietnam lists it for them. Share the body you plan to use and the nut torque spec. With those two facts, get a QJRXSM8A quote from Lost in HCM. Light J bodies sit under torque wrenches, more heads under torque wrench heads and adaptors, and you can contact SMK Vietnam at any time.
8 mm flare head FAQ
What limit does Snap-on give the QJRXSM8A?
Snap-on lists 17 ft-lb in CAT1500i and 200 in-lb in its UK brochure. Both work out to about 23 N·m.
Is there a Y-shank 8 mm flare nut head?
No. Snap-on’s metric Y column starts at 13 mm, so the QJRXSM8A needs a J body.
Which body suits the QJRXSM8A best?
A light J body such as the QC1I200 or the CTECH1J240A, so most of its scale stays usable.
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