M1-20-32-48 — Non-locking medium D-handle compression latch
12–22.5 mm door panel; 27–40 mm grip, or 51–64 mm with cam reversed. 316 stainless, electropolished.
Southco M1-20 Compression Latch Parts, Grip and Fitment Guide
Identify the correct Southco M1 lift-and-turn compression latch for an RV or marine access panel. Unlike standard push-to-close M1 latches, a compression latch pulls the door into its gasket during operation. The key variables are the original cutout, door panel thickness, grip distance, locking function and cam orientation—not just the visible round bezel.
Southco latch dimensions and installation drawings
Manufacturer technical pages include the real cam positions, cutout and mounting dimensions. Use M1-20-32-48 factory drawing and M1-20-81-48 factory drawing to compare your installed latch. Check the manufacturer's technical drawing for the exact dimensions and mounting details.
Compression latch parts and fitment table
M1-20-81-48 — Key-locking medium D-handle compression latch
2–12 mm door panel; 27–40 mm grip, or 51–64 mm reversed. 316 stainless, electropolished.
Compare the two M1-20 latch versions
For a 12–22.5 mm panel. A medium 316 stainless compression latch with a D-handle. Manufacturer grip range 27–40 mm using the regular cam orientation or 51–64 mm reversed.
For a 2–12 mm panel. Similar grip ranges but different panel-mount configuration, with a key lock. Do not replace one with the other without confirming the cutout and original latch security needs.
M1-2A-11-1 — push-to-close pop-out knob latch
Southco identifies M1-2A-11-1 as a chrome-plated plastic pop-out knob, push-to-close latch for 1.2–19 mm outer-panel thickness. It is a different latch family from the M1-20 compression models shown above. Compare the original cutout, panel thickness and latch operation before choosing a replacement.
Installation checks
Measure the outside panel thickness and the perpendicular distance from the latch mounting face to the keeper (grip). Check cam travel, strike alignment, any flange gasket and the actual cutout. Southco's M1-20 drawing distinguishes normal and reversed cam positioning; the figures above are factory-specified ranges, not universal RV compatibility.
For the different non-compression mechanism, see the Southco M1 push-to-close flush-pull guide. Compression is not a substitute for correct gasket material or an improperly aligned door.
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