Snap-on RTWH52J Flare Nut Head, 13/16″ Ratcheting 12-Point, J Shank (0.425″)

Description

Ordering this head starts with a part-number check. Lost in HCM lists it as the Snap-on RTWH52J flare nut head, without the SL letters. In CAT1500i, however, the 13/16 in J ratchet appears as RTWH52JSL. Both describe a slotted 12-point ring that ratchets on a 13/16 in nut from a J-shank (0.425 in) body.

RTWH52J or RTWH52JSL on your purchase order

The catalog does not explain the SL suffix, and it does not list a plain RTWH52J. So we cannot say whether the two numbers name the same head. If a tool list or a customer drawing names one number, quote that number exactly. Lost in HCM then confirms the match with Snap-on before it prices the order.

Sizes around the Snap-on RTWH52J flare nut head

So a plant with Y bodies would pick the RTWH52YSL at the same size. Meanwhile, a J kit can step up once more, to 7/8 in, before the J range ends.

Metric nuts and a 13/16 in ring

Thirteen-sixteenths of an inch converts to 20.64 mm. That is too small for a 21 mm hex and too large for a 20 mm one. As a result, the RTWH52J belongs on inch fittings only. For metric lines, Snap-on offers metric sizes on special order.

Reach and readings for the RTWH52J on a J body

RTWHJ heads sit 3.50 in from the pin to the fastener center, while fixed QJRXS heads sit at 2.50 in. Because of that extra length, a click body set from its scale overshoots at the nut. A CTECH1J240A can apply a stored head-length factor instead. It covers 12 to 240 in-lb, which suits light flare joints. For firmer J values, the QC2I75 reaches 75 ft-lb.

A molding machine job for the Snap-on RTWH52J flare nut head

Injection molding machines built to US drawings often carry inch tube fittings on their cooling and lube lines. When a 13/16 in nut sits behind a platen or guard, a socket cannot reach it. The RTWH52J slides on from the side, then ratchets in short swings. So the fitter can tighten the nut to the maker’s value without removing nearby lines.

How Lost in HCM prices the RTWH52J

SMK Vietnam lists this head for Lost in HCM, which supplies it and writes the quote. Include the part number from your tool list, your J body and the joint value. When that is ready, request a quote from Lost in HCM for the RTWH52J. More ratchet sizes appear under torque wrench heads and adaptors, and you can contact SMK Vietnam at any point.

RTWH52J buyer checks

Is the RTWH52J listed in CAT1500i?

Not under that number. CAT1500i prints the 13/16 in J ratchet as RTWH52JSL.

Which wrench bodies take the RTWH52J?

Any J-shank (0.425 in) interchangeable body, such as the QC2I75 or the CTECH1J240A.

Can the RTWH52J grip a 21 mm hex?

No, it will not go on. At 20.64 mm across, the ring is smaller than a 21 mm hex.