Snap-on QXOM20A Open End Head, 20 mm, X Shank (0.735″), 160 ft-lb Max

Description

Hydraulic power units often carry 20 mm flats on adapters, check valves and gauge ports, next to much larger fittings. The Snap-on QXOM20A open end head lets a crew torque those 20 mm parts with the same X-shank (0.735 in) body it uses for the big nuts. So the tool cart carries one handle instead of two.

A maintenance cart built around one X body

Think of a press shop in Dong Nai where the team owns a QD3IN350A for 36 mm line nuts. On the same unit, a 20 mm adapter needs a firm value too. Rather than buy a Y body, the crew adds the Snap-on QXOM20A open end head to the cart. Then one wrench, one record and one calibration cycle cover both jobs. No ISO 4032 or DIN 934 coarse nut uses 20 mm, so most 20 mm hexes here are fitting bodies.

Same limit as the Y jaw, longer reach

CAT1500i rates the QXOM20A at 160 ft-lb, or about 217 N·m. The UK brochure prints 1,925 in-lb, which rounds to the same 160 ft-lb. Both books give the 20 mm Y jaw that same figure. Therefore, the X head adds reach and kit fit, not extra load. Its retaining pin sits 4.50 in from the fastener center, against 3.00 in on a QYOM head.

Low-end limits on X bodies with the Snap-on QXOM20A open end head

• QD3IN350A: 70 to 350 N·m (59 to 251 ft-lb), so cap it at 160 ft-lb.
• QC4P300 preset: 60 to 300 ft-lb, so the jaw covers only the lower part.
• CTECH3X250A: 12.5 to 250 ft-lb, which also reaches small adapter values.

As a rule, the X mechanical bodies suit 20 mm joints between about 60 and 160 ft-lb. Below that, choose the electronic body or a lighter shank.

QXOM20A data we confirm, and data we leave out

We confirm the 20 mm opening, the X shank, the 160 ft-lb limit and a head depth of about 9 mm. However, the two catalogs print different outside diameters for the QXOM20A, so this page skips that figure. Plan tight spaces with a quick test fit or a question to Lost in HCM.

Pricing the Snap-on QXOM20A open end head for an X-body cart

Lost in HCM supplies the head and issues each quote, while SMK Vietnam lists it on their behalf. Request a quote from Lost in HCM and tell them which X body you run. You can also view torque wrench heads and adaptors or contact SMK Vietnam with a fit question.

Shop-floor questions on the 20 mm X jaw QXOM20A

Which X body reaches a 50 ft-lb value with the QXOM20A?

Yes, on the CTECH3X250A, which starts at 12.5 ft-lb. The QC4P300 begins at 60 ft-lb and the QD3IN350A at 59 ft-lb, so they cannot reach 50.

What outside diameter should I plan for with the QXOM20A?

Snap-on’s two catalogs give different widths for this jaw. If clearance is tight, ask Lost in HCM to confirm the size before you order.

Does a 13/16 in fitting fit the QXOM20A?

No. A 13/16 in hex is about 20.6 mm, so it will not enter a 20 mm jaw. Snap-on lists the QXO26A for 13/16 in on X bodies.