Description
A 29 mm fitting on a mid-size machine rarely needs heavy torque. Yet Snap-on offers no J-shank jaw at this size. So the Snap-on QYOM29A open end head, on the Y shank (0.560 in), is the lightest way to put a set torque on a 29 mm hex from the side.
No J option at 29 mm
CAT1500i leaves the J column empty at 29 mm, and the UK brochure skips it too. Therefore, the Snap-on QYOM29A open end head becomes the entry point for this size. Above it sit the X head and the dual-pin Z head, which need longer and heavier bodies. As a result, the Y head often wins on carry weight for 29 mm fittings.
Three 23 in bodies for the Snap-on QYOM29A open end head
| Body | Type | Range | Length |
|---|---|---|---|
| QC3P150 | Preset | 30-150 ft-lb | 23 in |
| QC3P200 | Preset | 40-200 ft-lb | 23 in |
| QD3IN200B | Dual scale | 40-200 N·m (37-140 ft-lb) | 23 in |
All three share a 23 in length, so the choice comes down to range and style. For instance, a line with one spec suits a preset, while a repair crew may prefer the dual-scale QD3IN200B with the QYOM29A.
The rating question
Snap-on’s two sources print different maximum torque values for the QYOM29A. So we leave the figure out here, and Lost in HCM confirms it with the quote. Until then, avoid setting a Y body near the top of its scale with this head. On the other hand, both sources agree on the size: 58 mm across and 12 mm deep.
29 mm parts that suit the Snap-on QYOM29A open end head
ISO 4032 and DIN 934 use no 29 mm hex for coarse-thread nuts. So a 29 mm part is usually a fitting, an adapter or a special nut. For example, a hydraulic adapter behind a hose may carry this size. Measure it with a caliper, then confirm the QYOM29A has room to swing. Its pin sits 3.00 in from the fastener center.
Ordering steps for the QYOM29A
First, note your Y body model and target torque. Then request a quote from Lost in HCM for the QYOM29A. SMK Vietnam lists the head, and Lost in HCM supplies it. For neighbor sizes, see torque wrench heads and adaptors, or contact SMK Vietnam for advice.
Y-shank 29 mm FAQ
Why is there no J version at 29 mm?
Snap-on’s tables simply do not list one. So the QYOM29A is the lightest 29 mm option in both sources.
Which Y body reads in N·m?
The QD3IN200B has dual scales, 40 to 200 N·m and 37 to 140 ft-lb. The two QC presets list ft-lb ranges.
What size nut uses 29 mm?
No standard ISO 4032 or DIN 934 coarse nut does. Expect fittings, adapters and special nuts instead.
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