Description
Hydraulic adapters and valve parts sometimes carry a 29 mm hex, a size that no standard metric nut uses. The Snap-on QXOM29A open end head reaches that hex on an X-shank (0.735 in) torque wrench. So a crew with an X body can cover 29 mm without hauling a second, heavier wrench.
What the catalogs confirm for the QXOM29A
| Item | QXOM29A |
|---|---|
| Opening | 29 mm |
| Shank | X (0.735 in) |
| O.D. | 58 mm |
| Head depth | 12 mm |
| Pin to fastener center | 4.50 in |
CAT1500i and the UK torque brochure match on these numbers. On the other hand, they print different maximum working torques, so we leave that value out. Lost in HCM can confirm it with your quote.
The middle shank at 29 mm
Snap-on makes 29 mm jaws on three shanks: Y, X and Z. No J version appears at this size. The Y head pairs with 23 in bodies, while the Z head needs the 41-1/2 in QD4IN800A. Therefore, the QXOM29A sits in between. It suits teams that want a wider torque range than a Y body offers but do not want to carry an 11 lb Z wrench.
Two X wrenches that drive the Snap-on QXOM29A open end head
CAT1500i lists two X-shank wrenches. The QC4P300 is a 27 in preset body for 60 to 300 ft-lb, which suits one fixed value on a line. In contrast, the QD3IN350A adjusts from 70 to 350 N·m, or 59 to 251 ft-lb. That 23 in body tips the scale at roughly 3.4 lb. Also, Snap-on sizes QD heads from pin to fastener center, so you need no length correction.
Fit check for a 29 mm adapter
First, measure the flats with a caliper, because 29 mm sits close to 30 mm, the M20 size. A 30 mm jaw on a 29 mm adapter sits loose and rounds the corners. Next, check the side room, since the QXOM29A spans 58 mm and stands 12 mm deep. Then confirm that the joint spec falls inside your X body scale before you fit the Snap-on QXOM29A open end head.
Quote the Snap-on QXOM29A open end head
Lost in HCM supplies this head, while SMK Vietnam lists it for them. Request a quote from Lost in HCM with the quantity, the delivery site and your X body. You can also check other heads and adaptors or contact SMK Vietnam.
QXOM29A: questions from hydraulic crews
Can a Y-shank wrench take the QXOM29A?
No. It needs an X (0.735 in) body, such as the QD3IN350A or the QC4P300.
Is 29 mm an ISO nut size?
No common ISO 4032 or DIN 934 coarse nut uses it. The nearest standard sizes are 27 mm for M18 and 30 mm for M20.
Which body suits one repeated spec?
The QC4P300 preset body works best for a single value. Set it once, and then every operator gets the same click.
Reviews
There are no reviews yet.