Description
Machines from Japan, Korea and Europe use metric tube fittings, and an inch head will not fit their nuts. The Snap-on RTWHM16JSL flare nut head gives those 16 mm nuts a ratcheting 12-point ring on a J-shank body. In Snap-on’s CAT1500i catalog, it is the one size in the metric ratcheting table.
Catalog check for the Snap-on RTWHM16JSL flare nut head
The CAT1500i table lists the RTWHM16JSL at 16 mm with a J (0.425 in) shank. It also puts the fastener 3.51 in from the retaining pin. SMK Vietnam shows a related part, the RTWHM16J, whose size we could not confirm. So if you want the catalog-listed 16 mm head, quote this part number.
Metric lines it suits
- Hydraulic tubes on injection molding machines and machine tools.
- Brake and fuel lines in vehicle assembly plants.
- Coolant and lube lines on CNC equipment.
Snap-on’s data sheet for the RTWHM16JSL also states compliance with Boeing ST2599, which helps aviation teams with a named tooling list.
Ratchet or solid 6-point at 16 mm
| Head | Type | Shank | Max torque |
|---|---|---|---|
| RTWHM16JSL | Ratcheting 12-point | J | Not listed |
| QJRXSM16A | Solid 6-point | J | 60 ft-lb |
| QYRXSM16A | Solid 6-point | Y | 75 ft-lb |
The solid heads grip every flat and keep the standard spacing, 2.50 in for J and 3.00 in for Y. So they suit soft fittings and quick setup. The Snap-on RTWHM16JSL flare nut head, by contrast, saves time where the swing is short.
Setting up a J body
On a click body, the RTWHM16JSL’s extra 1.01 in over a standard J head adds leverage. As a result, the scale value and the nut torque no longer agree. Ask Lost in HCM or Snap-on how to set the QC2I75 or QD2IN50A with it. The CTECH1J240A ControlTech body, however, handles head length with a built-in factor. It covers light specs up to 20 ft-lb.
Buying the Snap-on RTWHM16JSL flare nut head in Vietnam
Lost in HCM supplies this head and quotes it, while SMK Vietnam lists it. Quote the full part number and your body model, so the match is clear. Then request RTWHM16JSL pricing from Lost in HCM. Solid 16 mm flare nut heads sit in our heads and adaptors category, and our team takes questions through contact SMK Vietnam.
Questions on the 16 mm ratcheting head
Why quote RTWHM16JSL rather than RTWHM16J?
The RTWHM16JSL is the part number in Snap-on’s catalog for the 16 mm J head. We could not confirm the size of the RTWHM16J listing.
Does Snap-on list other metric ratcheting sizes?
Not in CAT1500i. However, Snap-on notes that other metric sizes come on special order.
What torque can it take?
Snap-on’s table shows no rating for it. So ask Lost in HCM to confirm before you set a value.
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