B-Line Eaton series accessories, 4, Latch inserts interchange with quarter-turn, Type 4 premier enclosure security inserts, Accessories, 7mm square l

The 7MSLK is a 7mm square latch insert for Eaton B-Line premier enclosures. It drops into the latch position in place of the standard quarter-turn insert, so the door can only be opened with a 7mm square key or wrench instead of a coin or screwdriver. It is a security insert, not a complete latch assembly or handle.

Yes. Latch inserts in this family interchange with quarter-turn, so the 7MSLK goes into the same latch opening without new door prep. You keep the existing latch hardware and change only the insert that the tool engages.

The insert is rated for NEMA 4 service and is UL Listed, so it is intended for watertight and dust-tight enclosure doors. Provided the enclosure gasket and latch hardware are intact and the door is drawn down properly, the insert is the correct part for a Type 4 opening.

A 7mm square insert restricts access to anyone carrying the matching key, which handles casual tampering in plant and utility areas where a quarter-turn can be opened with a coin. It is tool-based control, not key-differentiated security. If you need individually keyed or padlockable access with an audit trail, specify a keylock or padlockable handle kit for the enclosure instead of a security insert.

Only the insert. Ordering part 7MSLK gets you the 7mm square element that replaces the quarter-turn insert in an existing Eaton B-Line premier enclosure latch. If the door has no latch hardware at all, the latch assembly is a separate item.

It measures .625 in by .275 in by .275 in and weighs .001 lb. That footprint is what tells you it is just the insert element for the latch, small enough that it ships loose and needs to be tracked carefully on a multi-panel job.