Description
On an assembly line, one operator may torque the same bolt to the same value all shift. The Snap-on QJSD16A square drive head suits that rhythm. It gives a J-shank body a plain, fixed 1/2 in square, so nothing inside the head can slip or wear.
QJSD16A at a glance
- Drive: 1/2 in square, fixed.
- Shank: J (0.425 in).
- Head outside diameter: 1 in.
- Head depth: 1-1/4 in.
- Pin to fastener center: 2.50 in (QJD series).
A preset body plus the Snap-on QJSD16A square drive head
Snap-on describes its preset bodies as tools for one torque value, which suits repeat assembly. For instance, the J-shank QC2P75 preset body covers 5-75 ft-lb. Set it once, fit the QJSD16A, and the operator only has to pull to the click. Note that preset bodies come without a calibration certificate, so plan your own check routine.
Crowfoot and extension work with the QJSD16A
Snap-on notes that square drive heads let its bodies drive sockets, crowfoot wrenches and similar parts. So the QJSD16A can reach a line nut through a 1/2 in crowfoot. However, a crowfoot set straight out adds length to the lever. In that case, follow the wrench manual for the setting, or turn the crowfoot to 90 degrees.
Choosing between the QJSD16A and its neighbors
Snap-on’s fixed J heads also come in 3/8 in (QJSD12A) and 1/4 in (QJSD8A). The 3/8 in head shares the 1 in diameter but stands only 1 in deep. Meanwhile, Y bodies take the QYSD16A, and the ratcheting QJD16A widens to 1-5/8 in. Therefore, the QJSD16A fits best where the socket sits near a wall and you can swing the wrench freely.
Looking after the QJSD16A square
Check the corners of the square for rounding at each tool audit, because a loose socket can skew the click. Also wipe off grit before you lock the head into the body. Then keep the body on Snap-on’s periodic recalibration plan.
Ordering the Snap-on QJSD16A square drive head
Lost in HCM supplies this head and sends the quote, and SMK Vietnam lists it for them. Share your body model and the target torque. Then request QJSD16A pricing from Lost in HCM. You can also explore torque wrench heads and adaptors, see J-shank torque wrenches, or contact SMK Vietnam.
QJSD16A FAQ
Which shank does the QJSD16A use?
It uses a J (0.425 in) shank. For a Y body, Snap-on lists the QYSD16A instead.
Is there a ratcheting 1/2 in head for J bodies?
Yes. The QJD16A has a 1/2 in ratcheting drive on the same J shank.
Does Snap-on publish a torque limit for the QJSD16A?
Its fixed head table shows none, so ask Lost in HCM to confirm the limit with your quote.
Reviews
There are no reviews yet.