Description
A 32 mm nut is an awkward size for interchangeable wrenches. It is too big for any 9 x 12 insert, yet it is not the largest ring either. The Snap-on IZ32IR14X18 insert ring covers exactly that hex. It locks into a 14 x 18 mm IZO/ISO receiver and closes fully around the nut.

Which nuts measure 32 mm
Metric hex sizes differ between standards, so check yours first. For example, DIN 934 gives M22 nuts a 32 mm hex. However, ISO 4032 puts M22 at 34 mm, and Snap-on lists no 34 mm ring. So the IZ32IR14X18 suits DIN-pattern M22 hardware, which many machine drawings still call for. In addition, some flange and fitting nuts carry a 32 mm hex.
Snap-on IZ32IR14X18 insert ring among its neighbours
| Part | Type | Size | Fitting |
|---|---|---|---|
| IZ30IR14X18 | Insert ring | 30 mm | 14 x 18 mm |
| IZ32IR14X18 | Insert ring | 32 mm | 14 x 18 mm |
| IZ36IR14X18 | Insert ring | 36 mm | 14 x 18 mm |
| IZ32OE14X18 | Open-end insert | 32 mm | 14 x 18 mm |
All four come from the same Snap-on IZO table. Because the 9 x 12 rings stop at 19 mm, every option at this size needs a 14 x 18 receiver. Also note the jump from 32 to 36 mm, since no ring sits between them.
Ring or open end at 32 mm
Choose the Snap-on IZ32IR14X18 insert ring when you can drop the ring straight over the nut. Its closed shape spreads the load, so it treats coated or worn corners more kindly. On the other hand, a pipe or a long stud can block that path. In that case, the IZ32OE14X18 slides on from the side instead.
Bodies and torque ceiling for the 32 mm ring
Snap-on does not print a working torque for its insert rings, so the wrench body sets the ceiling. The ControlTech CTECHBN340A takes 14 x 18 mm inserts and reads 17 to 340 N·m. Then compare your M22 value with that range before you order. If the spec runs higher, plan a different tightening method rather than forcing this ring.
The CTECHBN340A also stores a calibration factor for different head lengths. Therefore, pick the factor that matches the IZ32IR14X18 each time you swap it in.
Care for the Snap-on IZ32IR14X18 insert ring
- Wipe the shank and receiver, so the lock seats without play.
- Seat the ring fully on the nut before you pull.
- Never use it to break a tight nut loose, as Snap-on warns.
- Keep the wrench on a regular recalibration schedule.
Ordering the 32 mm ring through Lost in HCM
SMK Vietnam lists the IZ32IR14X18, while Lost in HCM supplies it and prepares the price. Tell them your wrench model and the nut standard on your drawing. Then request an IZ32IR14X18 quote from Lost in HCM. More inserts sit under torque wrench heads and adaptors, and you can contact SMK Vietnam with fit questions.
IZ32IR14X18 FAQ
Will the IZ32IR14X18 fit an ISO M22 nut?
Usually not. ISO 4032 gives M22 a 34 mm hex, while this ring is 32 mm. Measure the flats first.
Does the 32 mm ring work on a 9 x 12 mm wrench?
No. It needs a 14 x 18 mm receiver, such as the one on the CTECHBN340A.
What is the next ring up from 32 mm?
The IZ36IR14X18. Snap-on lists no 34 mm ring between them.
















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