24 mm 12-Point 40° Bend Metric Box End Wrench Head – QYSBXM24A

The box end head QYSBXM24A is a Snap-on box end head that Lost in HCM supplies to workshops and factories across Vietnam. It has a Y (0.560") shank, so it fits handles built for that shank size. The center of fastener to retaining pin is QYSBXM Series – 3.00".

Box end head QYSBXM24A overview

The box end head QYSBXM24A is a metric 12-point box end head for interchangeable head torque wrenches. Its ring closes fully around the nut, while a 40° bend lifts the wrench above the work. So you can torque fasteners that sit below a flange or lip.

Snap-on builds this head in the USA for the Y shank, which measures 0.560 inch. The listed size is 24 mm, with a maximum recommended working torque of 160 ft-lb. In addition, the head carries an industrial finish for shop and plant use.

Its maximum recommended working torque is 160 ft-lb, about 217 N·m. Snap-on lists the country of origin as USA. The size is 24 mm.

The finish is Industrial Finish.

Specifications at a glance

These figures come from the Snap-on listing for QYSBXM24A. Values marked “calculated” are unit conversions we added for convenience.

How the box end head works

An interchangeable head torque wrench has a socket at the end of its tube instead of a fixed ratchet. You slide the head shank into that socket until the retaining pin locks it. Then the wrench measures torque through the head, so the click still marks your set value.

The box end head has a closed 12-point ring at the end of a 40° bend. First, you place the ring over the nut from above. Next, you pull the handle smoothly until the wrench clicks, and you stop right away.

Key features of the box end head QYSBXM24A

The details below explain why this head reaches recessed nuts and holds them firmly. They also show what to check before you add it to your existing Y-shank wrench set.

• Closed 12-point ring. The ring wraps fully around the nut and engages it at 12 points. Therefore, the head grips well and lets you reposition the wrench every 30° in tight spaces.
• 40° bend for clearance. The 40° bend lifts the shank and handle above the work surface. So the wrench clears flanges, lips, and nearby parts that would block a flat head.
• Fits Y-shank wrench bodies. The head uses a Y shank, which measures 0.560 inch. As a result, it fits any Snap-on or CDI interchangeable head wrench body with a Y-shank socket.
• Published 160 ft-lb limit. Snap-on lists a maximum recommended working torque of 160 ft-lb for this head. That figure tells you how far you can set the wrench before the head is at risk.
• Known center-to-pin distance. Snap-on lists 3.00 inches from the fastener center to the retaining pin. Because of this, you can check the wrench manual and apply any setting correction with confidence.
• Metric 24 mm size. The listed size is 24 mm, which suits many medium bolts on metric machines. In addition, metric sizing fits most Japanese, Korean, and European equipment in Vietnam.

Typical applications

This head solves one problem well: reaching a recessed nut with a full ring grip. Below are typical jobs where that matters, from flange bolts to machine frames and pump mounts.

• Recessed nuts and bolts. Some nuts sit below a raised edge or inside a pocket. The 40° bend lifts the wrench clear, so the ring reaches the nut while the handle stays free.
• Flange bolts near housings. Pump and gearbox flanges often have bolts close to the housing wall. Therefore, a bent box end head reaches these bolts where a straight head would touch the casing.
• Long studs and threaded rods. Nuts on long studs can block a socket from seating fully. A box end head drops over the nut from above, so the stud end does not get in the way.
• Machine frame bolts. Frames and bases on metric machines use medium bolts that need set torque. For example, a 24 mm nut often appears on bases, mounts, and brackets.
• Hydraulic and pump mounts. Pump and motor mounts often sit close to pipes and guards. In addition, the closed ring protects the nut corners, which helps on parts you tighten often.
• Production line torque checks. On assembly lines, a preset wrench with a box end head gives every operator the same result. The click signal also makes each tightened joint easy to confirm.

Industries that use the box end head QYSBXM24A

Bent metric box end heads matter wherever nuts sit near flanges, lips, or housings. The industries below rely on them every day. Many of these teams also work in FDI plants and service centers across Vietnam.

• Automotive manufacturing. Car and motorbike plants tighten metric bolts on frames, axles, and engine mounts. In Vietnam, FDI assembly plants often need documented torque values, so calibrated heads help them pass audits.
• Heavy equipment maintenance. Excavators, cranes, and forklifts from Japan and Korea use many medium metric bolts. For this reason, contractors in Vietnam use bent ring heads to reach bolts near frames and guards.
• Factory maintenance. Plants in Binh Duong, Dong Nai, and Long An run pumps, gearboxes, and conveyors with metric parts. So maintenance teams keep bent box end heads for bolts close to housings.
• Machine building. Machine builders that supply electronics and food plants assemble frames and bases with metric bolts. Plants in Bac Ninh and Hai Phong also need a clear torque record for ISO audits.
• Energy and power plants. Turbines, pumps, and compressors use flanges and mounts with medium metric bolts. Power plant crews in Vietnam use bent heads to torque them during planned outages.
• Rail and transport. Rail cars, buses, and trucks use metric bolts on bogies, brackets, and mounts. Therefore, depot teams use calibrated interchangeable head wrenches to meet the stated values.

Box end head QYSBXM24A compared with similar brands

Several makers sell ring heads or inserts for interchangeable head wrenches. Each system uses its own shank or insert fitting, so heads rarely swap across brands. The comparison below shows where the box end head QYSBXM24A fits among common choices.

If your team already uses Snap-on or CDI Y-shank interchangeable head wrenches, this head is the simplest choice. It locks into the bodies you own and carries a published limit. Even so, confirm current specs with each maker before you compare heads. Specifications change over time, so confirm current data with each maker before you decide.

Choosing the right model

• Start with the shank of your wrench body. This head uses a Y shank, so it needs a Y-shank wrench body from Snap-on or CDI.
• Measure the nut across its flats before ordering. A 24 mm head must match a 24 mm nut, because a loose ring can round the corners under load.
• Compare the joint spec with the head rating. For example, a joint above 160 ft-lb needs a heavier head and wrench body than this one.
• Check the space above and around each nut before you choose a head. If a lip or flange sits close, a 40° bend can lift the handle clear.
• Note the 3.00 inch center-to-pin distance. Then check the wrench manual to see whether the dial setting needs a correction for this head.
• Read the warranty line on the product page. This head carries a lifetime warranty on materials and workmanship while the buyer owns the tool.

Care, storage and calibration

• Store the head in a drawer slot or case, away from loose tools. Then the ring and shank stay free of nicks that affect fit.
• Wipe off oil, grease, and dirt after each job with a dry cloth. Also check the 12 points for wear, because worn points can slip on the nut.
• Send the wrench body for calibration every 12 months or 5,000 cycles, as ISO 6789-1:2017 recommends. We can arrange recalibration through an accredited laboratory.
• Never set the wrench above the head's 160 ft-lb working limit. Too much load can crack the ring or bend the neck, so retire any damaged head.
• Pack the head in a padded case for transport between sites. In addition, keep it dry during the humid season so the finish and shank stay clean.

Frequently asked questions

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