Description
Snap-on makes a 19 mm open-end insert for both IZO fittings. The Snap-on IZ19OE14X18 torque insert is the one for 14 x 18 mm receivers, while the IZ19OE9X12 serves the smaller fitting. Both grip the same nut from the side. So the real choice depends on the joint value and the wrench body you run.

Which receiver should carry a 19 mm jaw?
| Insert | Matching body | Body range | 20-100% band |
|---|---|---|---|
| IZ19OE9X12 | CTECHAN135A | 6.8-135.0 N·m | 27-135 N·m |
| IZ19OE14X18 | CTECHBN340A | 17.0-340.0 N·m | 68-340 N·m |
Below 68 N·m, only the 9 x 12 pair stays inside its calibrated band. Above 135 N·m, only the IZ19OE14X18 and its larger body can go. Between those values, either path works, so let the body you already own decide.
19 mm fasteners on the shop floor
DIN 934 gives M12 nuts a 19 mm hex, whereas ISO 4032 uses 18 mm. In addition, L10 and S8 cutting-ring fittings to ISO 8434-1 commonly carry 19 mm nuts. High-strength M12 joints on frames and mounts often need firmer values than small hardware. For those, the Snap-on IZ19OE14X18 torque insert on a 14 x 18 body leaves more headroom.
Open end or ring for the Snap-on IZ19OE14X18 torque insert
The closed IZ19IR14X18 ring fits the same receiver and wraps the whole hex. Use it when you can reach the nut from above. The open jaw of the Snap-on IZ19OE14X18 torque insert earns its place where a tube or stud runs through the nut. Because an open end grips only two flats, seat it fully and pull at a steady pace.
Fitting the Snap-on IZ19OE14X18 torque insert to the body
Push the shank into the 14 x 18 mm receiver until the lock engages, then tug it lightly to confirm. Next, pick the matching head-length factor in the ControlTech menu. After that, keep the receiver free of chips and coolant, because debris can stop the shank from seating. Finally, never use the insert to free a stuck nut, as Snap-on warns.
Pricing a 19 mm IZ19OE14X18 through Lost in HCM
SMK Vietnam only lists the IZ19OE14X18, while our partner Lost in HCM sources it and sets the price. Note your body model and the target value in the request. Send that through the IZ19OE14X18 page at Lost in HCM. You can compare other inserts under torque wrench heads and adaptors or contact SMK Vietnam.
IZ19OE14X18 sizing notes
Does a 19 mm jaw suit M12 hardware?
For DIN 934 nuts, yes. ISO 4032 M12 nuts measure 18 mm, so check the flats first.
Will a 9 x 12 receiver take the IZ19OE14X18?
No. A 9 x 12 receiver needs the IZ19OE9X12 instead.
Why choose the 14 x 18 version for a 19 mm nut?
Its body reaches 340 N·m, while the largest 9 x 12 ControlTech stops at 135 N·m.
















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