Description
Thirteen millimeters is the hex size of ISO M8 nuts and bolts, one of the most common fasteners on a factory floor. The Snap-on QJBOERM13A box end head puts a 13 mm 12-point ratcheting ring on a J-shank torque wrench. So a light body can run down and torque those M8 joints without leaving the fastener.
Three J heads for a 13 mm hex
| Head | Type | CAT1500i limit | Pin to fastener |
|---|---|---|---|
| QJBOERM13A | Ratcheting box end, 12-point | None printed | 2.50 in |
| QJXBM13A | Box end, 10° offset, 12-point | 60 ft-lb | 2.50 in |
| QJRXSM13A | Flare nut, 6-point, slotted | 58 ft-lb | 2.50 in |
Pick the ratcheting QJBOERM13A for long rundowns on open bolts. Choose the offset box when the handle must clear a lip. Then keep the flare nut head for tube nuts. All three lock into the same J body at the same spacing.
How big is the Snap-on QJBOERM13A box end head?
CAT1500i lists a 25 mm O.D. and a 10 mm depth for the 13 mm head. By contrast, the 12 mm head is slimmer at 23.5 mm and 8 mm. Above it, the 15 mm head grows to 28.5 mm and 11 mm, since Snap-on lists no 14 mm ratcheting box end. Therefore, check the gap beside each M8 bolt before you plan a head set.
J bodies for M8 work
J bodies span light and mid ranges. For example, the QD2IN50A reads 10-50 N·m, while the QD2IN100A reads 20-100 N·m. The CTECH1J240A tops out at 27.2 N·m and suits light M8 joints. Snap-on prints no working limit for its ratcheting box end heads in CAT1500i. So ask Lost in HCM to confirm the QJBOERM13A rating before you set a high value.
Grit, coolant and the QJBOERM13A pawl
Keep the ring free of chips and coolant, which can make the pawl skip. Set the direction before each pull, then draw the handle at an even pace to the signal. Snap-on tells users not to break fasteners loose with its torque tools. Instead, crack a seized bolt with a plain wrench, and finish it with the torque wrench.
Where to price the Snap-on QJBOERM13A box end head
Lost in HCM, the supplier behind this SMK Vietnam listing, prepares the quote. Gather your J body model and the M8 torque specs first. Next, send a QJBOERM13A request to Lost in HCM. J bodies sit under torque wrenches, other heads under torque wrench heads and adaptors, and SMK Vietnam can answer fit questions.
13 mm ratcheting head questions
Is there a 14 mm ratcheting box end head?
Not in CAT1500i. The metric list jumps from the 13 mm QJBOERM13A to 15 mm.
Can I get the 13 mm ring on a Y shank?
No. Snap-on’s Y ratcheting box end heads come only in 16, 18 and 24 mm.
Which fasteners take a 13 mm ring?
ISO and DIN M8 hex nuts and bolts both measure 13 mm across flats. Still, measure before you order the QJBOERM13A.
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