The APT 633 (M633CN) is the short-stroke closed-nose rivet buster in American Pneumatic Tools' U.S.-built Airgo-Line compact rivet-buster family. The 6 in. piston stroke is the choice when section thickness is moderate, access is tight, or operator-shift duration favors a lighter tool, trading the deeper reach of the M133CN and M1133CN for compact 28-lb weight.

• Compact 6 in. stroke with 1-3/16 in. cylinder bore, deep case-hardened alloy cylinder, and heavy-duty upper and lower sleeves.
• Closed-nose construction keeps debris out of the front-end assembly during rebar and torch-cut steel work.
• Delivers 1,100 BPM at 42-46 CFM consumption at 90 PSI through a 1/2 in. NPT female air inlet.
• D-handle: 28 lb at 28 in. overall length; pistol-grip: 28 lb at 21 in. overall length for confined-space work.
• Both variants share the Jumbo 11X (.866 in.) shank, adjustable exhaust deflector, and drop-forged handle construction.
• Built for bridge-deck patch work, tight-access reinforced concrete demolition, tank cutting, rivet head removal, and overhead or vertical demolition.
• Crowder Supply stocks the full Jumbo 11X rivet-buster steel range plus M633CN cylinders, retainers, valves, throttle assemblies, sleeves, and exhaust deflectors.
• Old MPNs 18848 (D-handle) and 18849 (pistol grip) cross-reference to current APT 1280-series part numbers.