Snap-on QJOM30 Open End Head, 30 mm, J Shank (0.425″), 60 ft-lb Max

Description

A 30 mm hex usually signals M20 hardware, yet some 30 mm parts need only a light, careful pull. Examples include a plastic pump union, a level gauge body or a lock ring on an adjuster. The Snap-on QJOM30 open end head handles those jobs on the J shank (0.425 in). So you can torque a wide hex with a short, light wrench.

The 30 mm row, shank by shank

Watch the part number, because CAT1500i prints QJOM30 with no A suffix. Also, the UK torque brochure ends its J column at 27 mm. As a result, the catalog and the source packet are the only listings, and both give 60 ft-lb.

Room around a 61 mm Snap-on QJOM30 open end head

Both Snap-on sources list the 30 mm head at 61 mm across and 13 mm deep. That width is about twice the hex, so a nearby hose or bracket can block the swing. Therefore, hold a plain 30 mm spanner in place first and sweep it through the arc. If the spanner barely clears, the wider QJOM30 may not, so look for another approach angle.

J bodies with a 60 ft-lb cap on the QJOM30

• QC2P75 preset, 5 to 75 ft-lb, 11 in: lock it at the joint value and never past 60 ft-lb.
• QC2I75 adjustable, 5 to 75 ft-lb, 13 in: the top 15 ft-lb of its scale is off limits with this jaw.
• QD2IN100A dual scale, 20 to 100 N·m (16.6 to 71.9 ft-lb): stop near 81 N·m.
• QD2IN50A dual scale, 10 to 50 N·m: every setting already sits under the head limit.

In addition, the QD models ship with a calibration certificate, which helps on audited lines. CAT1500i also notes that QD heads share one pin-to-fastener size, so a QJOM30 on a QD body needs no length correction.

When the QJOM30 is the wrong choice

Steel M20 nuts in ISO 4032 and DIN 934 both use a 30 mm hex. However, those joints usually call for much more than 60 ft-lb. In that case, step up to a heavier shank and a matching body. Keep the Snap-on QJOM30 open end head for low specs on wide parts, such as unions, plugs and lock rings. A 16S tube nut in ISO 8434-1 also measures 30 mm, so check its spec against the head limit first.

Getting a price on the Snap-on QJOM30 open end head

SMK Vietnam lists this head for its partner, while Lost in HCM supplies it and prepares the quote. Request a quote from Lost in HCM and mention your J body and the joint spec. You can also compare other jaws under torque wrench heads and adaptors, or contact SMK Vietnam for help with fit.

Questions buyers ask about the 30 mm QJOM30

Is there a J-shank head for 29 mm too?

No. CAT1500i shows a dash in the J column at 29 mm. So the QJOM30 is the next J jaw after the 27 mm QJOM27A.

What does the QJOM30 limit equal in N·m?

Sixty ft-lb works out to about 81.3 N·m. Keep any J body at or below that figure while this head sits on the tube.

Should I order it as QJOM30A?

Quote QJOM30, the exact number CAT1500i prints. Its 30 mm neighbors on other shanks all carry an A suffix, so the short number avoids a mix-up.