Description
Scan Snap-on’s IZO insert table for 12 mm and you find a single entry. The Snap-on IZ12IR9X12 insert ring is that part, a closed ring on the small 9 x 12 mm fitting. Neither an open end insert nor a 14 x 18 mm version exists at this size.
A gap in the open end list
The 9 x 12 mm open end inserts run from 7 to 19 mm, yet they skip 12 mm. Meanwhile, the 14 x 18 mm series starts at 13 mm. So if a 12 mm nut sits behind a tube or a cable, no IZO jaw can reach it from the side. In that case, plan another tool, such as the QJRXSM12A flare nut head on a J-shank body. For any hex you can reach from above, the IZ12IR9X12 does the job.
Where 12 mm hex heads turn up
ISO 4017 and DIN 933 bolts skip this size: M8 uses 13 mm, and the DIN M7 uses 11 mm. Therefore, a 12 mm hex usually points to a special part. For example, some flange bolts from Asian machine builders use it, as do sensor bodies and small fittings. Gauge each hex first, because the IZ12IR9X12 will not seat on a 13 mm head.
Low-range bodies for the Snap-on IZ12IR9X12 insert ring
Three ControlTech bodies in CAT1500i carry the 9 x 12 mm receiver. The CTECHAN30A and CTECHANM30 read 1.5 to 30 N·m, while the CTECHAN135A reads 6.8 to 135.0 N·m. Small 12 mm parts often need low values, so a 30 N·m body tends to suit them. Snap-on calibrates from 20% of full scale. That means 6 N·m on a 30 N·m body and 27 N·m on the larger one. Therefore, match the body to the lowest value you plan to use.
Daily care of the Snap-on IZ12IR9X12 insert ring
Keep the ring and its shank in a clean tray between jobs. Before each use, check that the lock clicks home and the insert does not wobble. Also save the ControlTech head setting for this ring under a clear name, so operators pick it fast. Snap-on calls for periodic recalibration, so book the body on schedule.
Price the IZ12IR9X12 through Lost in HCM
Lost in HCM supplies the Snap-on IZ12IR9X12 insert ring and quotes it, while SMK Vietnam lists it as a partner product. Gather your body model and the torque value for each 12 mm joint. After that, request a quote from Lost in HCM for the ring. Other sizes appear under torque wrench heads and adaptors, and SMK Vietnam can help with fit questions.
12 mm insert questions
Is there a 12 mm open end IZO insert?
Not in CAT1500i. The 9 x 12 mm open end list jumps from 11 mm straight to 13 mm.
Does the IZ12IR9X12 fit the CTECHBN340A?
No. That body has a 14 x 18 mm receiver, and Snap-on makes no 12 mm insert for it.
Which rings sit beside the IZ12IR9X12?
The IZ11IR9X12 below and the IZ13IR9X12 above, both on the 9 x 12 mm fitting.
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