Description
A 23 mm valve or fitting nut often sits in a tight pocket with no room for a socket. The Snap-on QXXM23A box end head reaches it with a slim 12-point ring on an X-shank (0.735 in) body. Because the ring wraps every corner, it also protects soft or plated hex flats.
Sizes worth knowing on the QXXM23A
The ring opens to 23 mm, measures 34 mm across and stands 15 mm deep. Its pin sits 4.50 in from the center of the fastener, as on all QXXM heads. In addition, the source packet matches the UK brochure on these sizes. For comparison, the 23 mm open jaw spans 47 mm but stands only 10 mm deep.
Picking ring or jaw for a 23 mm hex
Choose the QXXM23A when you can reach the nut from above or from a free bolt end. Then the 12 points share the load and reduce rounding. On the other hand, a nut on a hose or tube needs the open jaw, because the ring cannot slide past the line. If width is the problem, the ring wins, since it is 13 mm narrower.
Matching an X body to the Snap-on QXXM23A box end head
CAT1500i lists two X bodies. The QC4P300 presets from 60 to 300 ft-lb, while the QD3IN350A adjusts from 70 to 350 N·m, about 59 to 251 ft-lb. Also, Snap-on sizes QD heads from pin to fastener, so you need no length correction. Still, set either body no higher than the head limit that Lost in HCM confirms.
A rating to confirm first
The source packet gives this ring 240 ft-lb. However, the UK brochure lists the QXXM23A at 3,600 in-lb, which equals 300 ft-lb. Because the gap matters at the top of the X range, this page leaves the figure out. So ask Lost in HCM for the value that applies to your part.
Other shanks and the Snap-on QXXM23A box end head
The UK brochure also shows 23 mm rings as the QJXM23A on the J shank and the QYXM23A on the Y shank. So a light spec may suit a smaller body. Meanwhile, no Z ring appears at 23 mm in that table. In short, the QXXM23A is the heaviest 23 mm ring in the brochure.
QXXM23A pricing through Lost in HCM
Request a quote from Lost in HCM for the QXXM23A, and name your X body and the joint spec. Lost in HCM supplies the ring; SMK Vietnam lists it. For open jaws, see torque wrench heads and adaptors, or contact SMK Vietnam.
23 mm ring FAQ
Is the QXXM23A narrower than the 23 mm open end head?
Yes. The ring measures 34 mm across, while the open jaw measures 47 mm.
Does Snap-on offer a 23 mm ring on the Z shank?
Not in the UK brochure table. Its 23 mm row stops at the X-shank QXXM23A.
Can I use the QXXM23A to loosen a stuck nut?
No. Snap-on warns against breaking fasteners loose with torque wrenches.
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