Description
At 7/8 in, Snap-on’s two ratcheting flare nut lines meet for the last time. The J range stops at this size, while the Y range carries on to 1-5/8 in. The Snap-on RTWH56YSL flare nut head is the Y-shank (0.560 in) half of that pair. Its slotted 12-point ring passes over the tube, then ratchets on the nut without leaving the flats.
RTWH56YSL or RTWH56JSL: let the body decide
Both heads turn the same 7/8 in hex, so the wrench in your cabinet makes the call. CAT1500i puts RTWHJ heads 3.50 in from the retaining pin to the fastener center. RTWHY heads such as the RTWH56YSL sit at 4.43 in. In addition, Y bodies reach higher values, which suits a 7/8 in nut on a firm steel fitting.
| Body | Shank | Range |
|---|---|---|
| QC3P150 preset | Y | 30-150 ft-lb |
| QC3P200 preset | Y | 40-200 ft-lb |
| CTECH2Y100A ControlTech | Y | 5-100 ft-lb |
| QC2I75 adjustable | J | 5-75 ft-lb |
So pick the RTWH56YSL when a Y body already serves the line. Pick the J twin when the joint value is light and a short J wrench reads it more finely.
Why the Snap-on RTWH56YSL flare nut head needs a setting check
A longer head adds lever between the pin and the nut. As a result, a click body set straight from its scale puts more torque on the nut than it shows. The CTECH2Y100A stores a calibration factor for different head lengths, so it can allow for the 4.43 in reach. For a QC preset, ask Lost in HCM for Snap-on’s setting method before the first pull. CAT1500i also leaves the rating column out of its ratcheting table, so no head limit appears on this page for the RTWH56YSL.
A 22 mm nut and the RTWH56YSL
Seven-eighths of an inch works out to 22.23 mm. That is only a quarter of a millimeter over a 22 mm hex, yet the gap lets the ring rock onto the corners. Therefore keep the Snap-on RTWH56YSL flare nut head for inch fittings, and measure any nut of unknown origin. For metric lines, Snap-on offers metric sizes on special order, and Lost in HCM can request one.
Aviation tool lists and the RTWH56YSL number
Snap-on states that these heads meet Boeing ST2599 specifications. Hangar tool lists often name exact part numbers, so the suffix matters at goods-in. CAT1500i prints this size as RTWH56YSL. However, Lost in HCM also lists an RTWH56Y without the SL letters, and the catalog does not explain the suffix. So copy the number from your own list, and the team will confirm that it matches the Snap-on RTWH56YSL flare nut head.
Snap-on RTWH56YSL flare nut head: what to send Lost in HCM
SMK Vietnam lists this head on behalf of Lost in HCM, which supplies it and prepares the price. Send the body model, the fitting size and the joint value with your request. Those details let the team quote the RTWH56YSL through Lost in HCM in one pass. You can browse the other ratchet sizes under torque wrench heads and adaptors, or contact SMK Vietnam.
Asked about the RTWH56YSL
Does the RTWH56YSL suit -8 JIC hose ends?
Often, yes. On many 37-degree JIC fittings, the swivel nut for 1/2 in tube has a 7/8 in hex. Makers vary, though, so measure the nut before you order.
What separates the RTWH56YSL from the RTWH56Y?
Size and shank match in the partner data. Only the SL number appears in CAT1500i, so Lost in HCM confirms any difference before it quotes.
Which Y ratchet comes next above 7/8 in?
The RTWH60YSL, at 15/16 in, on the same Y shank.
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