Description
Lost in HCM lists the Snap-on 342-41-1 socket adaptor as a female 1/4 in square to female 3/8 in square link for torque testers. Snap-on’s CAT1500i accessory table reads differently, though. There, the 1/4 x 3/8 description sits beside the 342-41-1S, while the 342-41-1 shows 1/4 x 1/4. So confirm the second square before you order.
Two sources, two descriptions
| Source | 342-41-1 | 342-41-1S |
|---|---|---|
| Lost in HCM listing | Female 1/4 in x 3/8 in | Not listed here |
| CAT1500i p.353 text | Female 1/4 in x 1/4 in | Female 1/4 in x 3/8 in |
We read the catalog from its text layer, which pairs part numbers and descriptions by their order. A layout slip could shift one row, so the gap may be a catalog quirk. Either way, both sources agree on the 1/4 in female end.
What a stepped Snap-on 342-41-1 socket adaptor would do
Wrench drives are male squares, and so is the drive on many testers. Two male squares cannot meet, so a part with a female opening at each end joins them on one axis. If your unit is the 1/4 x 3/8 version, it links a 3/8 in wrench to a 1/4 in tester drive, or the reverse. Snap-on also states that each TTC transducer includes the correct adaptor for its range. Therefore check what came with your sensor before you buy extra links.
Range sense with a mixed-drive adaptor
A 3/8 in wrench often works above what a 1/4 in sensor reads. For example, the 1/4 in TTC65 tops out at 150 in-lb. A 3/8 in wrench set at 300 in-lb belongs on the 3/8 in TTC7, which reads 30-400 in-lb, instead. In short, use a stepped link such as the 342-41-1 only where the wrench range and the sensor range overlap.
Keeping the 342-41-1 square and clean
Seat each end of the Snap-on 342-41-1 socket adaptor fully on its square before you load the joint. Keep both bores clean and dry, because grit can tilt the wrench off axis. Retire any adaptor whose openings show rounding or cracks. Finally, Snap-on notes that periodic recalibration checks keep a tester accurate, so plan them for the whole setup.
Snap-on 342-41-1 socket adaptor: getting a quote
SMK Vietnam lists this part for its partner, and Lost in HCM supplies it and prepares the quote. Name the tester drive, the wrench drive and the part number you need. Then request a quote from Lost in HCM for the 342-41-1 and ask them to confirm both squares. Other links sit in torque wrench heads and adaptors, or contact SMK Vietnam.
342-41-1 checks before you buy
Is the 342-41-1 a 1/4 x 1/4 or a 1/4 x 3/8 adaptor?
Lost in HCM lists it as 1/4 x 3/8. CAT1500i text shows 1/4 x 1/4 and gives 1/4 x 3/8 to the 342-41-1S, so Lost in HCM confirms which part ships.
Which Snap-on part joins a 1/4 in hex driver to a square drive?
The 260-27, which CAT1500i lists as a 1/4 in hex x 1/4 in square socket adaptor.
Should I order by part number or by size?
Give both. Quote 342-41-1 and state the two square sizes you need, so Lost in HCM can match the right part.
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