Description
Many torque benches carry a 1/2 in male drive, while plenty of shop wrenches end in a 3/8 in male square. Two male drives cannot meet directly. The Snap-on 65-26-2 socket adaptor joins them, with a female 1/2 in square on one end and a female 3/8 in square on the other.
Catalog listing for the Snap-on 65-26-2 socket adaptor
Snap-on lists the 65-26-2 as a “Female 1/2 in Square x 3/8 in Square Socket Adaptor”. It sits in the accessories table for torque comparators and TTC testers, next to the transducer mounts. So it belongs on the test bench rather than in a socket set.
Which way round it goes
First, press the 1/2 in end onto the male 1/2 in drive of the tester or transducer. Next, place the 3/8 in wrench drive into the open end. Then pull the wrench slowly, as you would for any check. Because the adaptor sits on the drive axis, it adds no lever length to the wrench.
65-26-2 or a drive reducer?
Snap-on also lists the 2000-152-3, a 1/2 in male to 3/8 in female square drive reducer. That part suits a female 1/2 in input, such as a tester that receives the wrench. By contrast, the 65-26-2 is female at both ends, so it suits a male 1/2 in tester drive. Therefore, look at the tester drive before you choose.
Other female adaptors in the same table
- 342-41-2: female 3/8 in to 3/8 in, for matched 3/8 in setups.
- 65-78-1: female 1/2 in to 3/4 in, for larger wrenches.
- 65-78-2: female 3/4 in to 3/4 in.
A lab that checks 3/8, 1/2 and 3/4 in wrenches on one bench may need several of these alongside the 65-26-2.
Bench habits that protect accuracy
Seat both ends fully, since a loose fit lets the drive rock under load. Also wipe the squares before each test session. Replace the adaptor if a square shows rounding or cracks. Finally, keep up the periodic recalibration checks that Snap-on calls necessary for tester accuracy.
Request the Snap-on 65-26-2 socket adaptor from Lost in HCM
SMK Vietnam lists this adaptor, while Lost in HCM supplies it and quotes it. Tell them the tester or transducer drive you have and the wrench drives you check. Then request a 65-26-2 quote from Lost in HCM. See torque testers and calibration systems or torque wrench heads and adaptors, or contact SMK Vietnam.
65-26-2 FAQ
Can it join a 3/8 in wrench to a 1/2 in tester drive?
Yes, when both drives are male. The 1/2 in end goes on the tester, and the wrench enters the 3/8 in end.
Does the adaptor change the wrench reading?
It stays on the drive axis, so it adds no lever length. Still, seat it fully for a clean result.
Is there a 3/8 in to 3/8 in version?
Yes. Snap-on lists the 342-41-2 for female 3/8 in to 3/8 in.
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