Description
Fifteen millimeters sits between the ISO hex sizes for M8 (13 mm) and M10 (16 mm). As a result, a 15 mm hex on a machine usually belongs to a fitting, an adapter or a special nut, not a standard bolt. The Snap-on QJOM15A open end head brings that size to a J-shank torque body, so a light, compact wrench can reach it from the side.
What we could confirm on the QJOM15A
- Opening: 15 mm, open end.
- Shank: J (0.425 in).
- Fastener center to retaining pin: 2.50 in (QJOM series).
- Head depth: about 7 mm in both Snap-on sources.
- Also offered at 15 mm: the Y-shank QYOM15A.
The two Snap-on references disagree on this head’s torque limit and on its width. CAT1500i prints a lower limit than the UK brochure. So we omit both figures, and Lost in HCM confirms the rating with your quote.
Should a 15 mm job use the QYOM15A instead?
Here the two sources line up on the Y version. Both put the QYOM15A at about 74 ft-lb, with a longer 3.00 in pin spacing. Therefore a Y body makes sense when a 15 mm part needs a high value. The QJOM15A, in contrast, keeps the tool short and light for lower values. In most plants, that suits fittings and adapters far better than heavy torque.
Which J body drives the Snap-on QJOM15A open end head
CAT1500i lists two J bodies in ft-lb. The QC2I75 adjusts from 5 to 75 ft-lb, while the QC2P75 presets over the same range. There is also the QD2IN100A, which reads 20 to 100 N·m. However, those ranges may run past what the head can carry. So set the body only after Lost in HCM confirms the QJOM15A limit for your order.
Typical 15 mm jobs for the QJOM15A
Fluid-power and process equipment often carries odd hex sizes. For example, a tube adapter, a sensor body or an adjuster lock nut may use 15 mm. Such parts often sit among hoses, so the open jaw slides in from the side. Then the click tells the technician to stop. Because the Snap-on QJOM15A open end head sits on a J body, it also suits work on benches and in tight cabinets.
Next sizes: 14 mm and 16 mm
At 14 mm, CAT1500i lists the QJOM14A and QYOM14A, both at 55 ft-lb. At 16 mm, the ISO hex for M10, the J and Y versions continue. So if your part measures 16 mm, choose a 16 mm head rather than forcing the QJOM15A. Also, a worn or painted hex can measure oddly, so use a caliper on clean flats.
Quoting the Snap-on QJOM15A open end head
Lost in HCM supplies this head and sends the quote, while SMK Vietnam lists it as a partner item. Request a QJOM15A quote from Lost in HCM and mention your J body and target torque. To compare other jaws, see torque wrench heads and adaptors, or contact SMK Vietnam for help.
Fifteen-millimeter questions
Which bolt size uses a 15 mm hex?
No standard ISO metric bolt does. M8 uses 13 mm and M10 uses 16 mm, so 15 mm usually means a fitting or special part.
Why does this page leave out the QJOM15A torque limit?
Snap-on’s two references give different figures. Lost in HCM confirms the correct one with your quote.
How deep is the QJOM15A jaw?
About 7 mm, according to both Snap-on sources. That thin profile helps it slide behind tubing and brackets.
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