Description
Big hex nuts get painted, plated and knocked about, and an open jaw can mark their corners. The Snap-on IZ36IR14X18 insert ring closes fully around a 36 mm nut instead. It mounts on a 14 x 18 mm IZO/ISO receiver, which suits ISO M24 hardware with a 36 mm hex.
Biggest ring in the IZO table
Snap-on’s 14 x 18 rings come in 13, 14, 15, 17, 19, 22, 24, 27, 30, 32 and 36 mm. So the IZ36IR14X18 tops the list. The step below is the IZ32IR14X18, and there is no 34 mm ring between them. Meanwhile, the 9 x 12 rings stop at 19 mm, so this size needs a 14 x 18 wrench.
Snap-on IZ36IR14X18 insert ring or the 36 mm OE?
Snap-on also sells the IZ36OE14X18, a 36 mm OE insert on the same fitting. The ring grips every corner, which helps on worn or coated nuts. However, it must drop over the nut from above or from the end of the stud. If a pipe, rod or bracket blocks that path, the OE version reaches in from the side. Many teams keep both, because large joints vary so much from machine to machine.
Torque headroom with the Snap-on IZ36IR14X18 insert ring
Snap-on does not print a working torque for its insert rings. Instead, the wrench sets the ceiling. The ControlTech CTECHBN340A covers 17 to 340 N·m on a 14 x 18 receiver. For M24 work, check that figure against your spec early, since high-grade bolts in this size can need more. If they do, plan a heavier tightening method rather than this ring.
The CTECHBN340A also stores a calibration factor for each head length. Therefore, select the factor for the 36 mm ring every time you fit it.
Large-nut work that suits a closed ring
- Base and anchor nuts on pumps, fans and gearboxes.
- Flange nuts on large pipework and press frames.
- Coupling and mounting nuts on heavy equipment.
Each of these jobs usually allows top access, so the IZ36IR14X18 can seat squarely before you pull.
Looking after a 36 mm ring
Keep the ring flat on the nut and pull smoothly through the signal. Also clean the 14 x 18 shank before each swap, so it locks without a gap. Never use the ring to free a seized nut. In addition, keep the wrench on a regular recalibration plan, as Snap-on advises.
Quotes for the IZ36IR14X18
SMK Vietnam lists the ring, but Lost in HCM supplies it and handles pricing. Send them your wrench model and joint values, so they can confirm the match. Then request an IZ36IR14X18 quote from Lost in HCM. You can compare other inserts under torque wrench heads and adaptors, or contact SMK Vietnam.
Common IZ36IR14X18 questions
Can the IZ36IR14X18 pass over a tube or rod?
No. It is a closed ring, so it needs open access to the nut. Use the IZ36OE14X18 when something blocks the top.
Which ring is one size smaller?
The IZ32IR14X18. Snap-on lists no 34 mm ring.
What wrench reads high enough for M24 work?
On the 14 x 18 fitting, the CTECHBN340A reaches 340 N·m. Compare that with your spec before you order.
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