Description
Why fit a small 11/16 in head to a mid-size Y body? Because many stations run one Y wrench for every line on the job, from small pilot tubes to large hoses. The Snap-on RTWH44YSL flare nut head gives that wrench a ratcheting 12-point ring for the small nuts. So the operator swaps heads, not wrenches, and the torque record stays tied to one tool.
RTWH44YSL reach and fit
| Opening | 11/16 in, 12-point, ratcheting |
|---|---|
| Shank | Y (0.560 in) |
| Pin to fastener center | 4.43 in (RTWHY heads) |
| Standard | Boeing ST2599, per Snap-on |
J or Y at 11/16 in
Snap-on offers this opening twice. The RTWH44JSL suits light J bodies, while the RTWH44YSL suits Y bodies. Choose by the wrench you already own and calibrate, not by the nut. The Snap-on RTWH44YSL flare nut head makes sense when a Y body already lives at the station. In addition, think about the range. A Y body usually starts higher on its scale, so very low specs read better on a J body.
A Y-shank line kit around the Snap-on RTWH44YSL flare nut head
Snap-on’s Y ratcheting range runs from the 3/8 in RTWH24YSL up to the 1-5/8 in RTWH104YSL. Therefore one Y body can carry a small rack of heads for a whole hydraulic circuit. For example, a kit might pair the RTWH44YSL with the 5/8 in RTWH40YSL and the 3/4 in RTWH48YSL. Then add solid Y heads, such as the 92 ft-lb QYRX22A, for joints with a firm published limit.
The 4.43 in reach and your setting
Standard Y heads sit 3.00 in from the pin. By contrast, RTWHY heads sit at 4.43 in, so the RTWH44YSL adds 1.43 in of lever. A click body set for a standard head will therefore not read true. The CTECH2Y100A ControlTech body, rated 5-100 ft-lb, handles this with a built-in head-length factor. For a QC3P150 or QD3IN200B, ask Lost in HCM how Snap-on wants the value corrected.
Daily checks on the RTWH44YSL ratchet
Turn the ring by hand before each shift and feel for a clean, even click. Next, wipe off hydraulic oil, then blow grit out of the ratchet with dry air. Also check the open ring for a widened gap, because a spread ring loses grip on small nuts.
Pricing the Snap-on RTWH44YSL flare nut head with Lost in HCM
SMK Vietnam lists this head as a partner product, and Lost in HCM supplies it and sends the price. Name your Y body and the fitting spec in the request. Then open an RTWH44YSL quote with Lost in HCM. Other sizes appear in torque wrench heads and adaptors, and you can contact SMK Vietnam with fit questions.
Fit and reach questions on the RTWH44YSL
Is the RTWH44YSL the smallest Y ratcheting head?
No. Snap-on’s Y list starts at 3/8 in with the RTWH24YSL.
How much longer is the RTWH44YSL than a standard Y head?
It sits 4.43 in from the pin, which is 1.43 in beyond the usual 3.00 in.
Can the RTWH44YSL go on a J-shank body?
No. It locks only into Y bodies. For a J wrench, order the RTWH44JSL.
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