3M 7000005897 3M, Scotchlok, Adapter, Non-Insulated Double Male-Female, MA250DMMFK, 500/Case

The MA250DMMFK is a double male-female disconnect adapter. It joins two quick-disconnect terminals that are already crimped onto wires, so you can couple a male tab to a female receptacle without re-terminating either wire. 3M lists it as an adapter-style disconnect terminal with a double male-female orientation, and it is non-insulated.

Yes. The MA250DMMFK mates with 0.25 inch (6.35 mm) wide male tabs and female disconnects, which is the common quarter-inch quick-connect size used on appliance, motor and control wiring. If your existing terminals are 0.187 inch or 0.110 inch tabs, this one will not mate.

It is a bare, non-insulated adapter with a butted-seam barrel, so the metal is exposed once mated. On any installation where the joint could be touched or could contact a grounded surface, sleeve it with heat shrink or tape, or house it inside an enclosure.

Figure about 0.76 inch of added length overall. That matters when you are coupling inside a tight junction box or behind a panel, since the adapter sits between the two existing terminals and pushes the splice point further along the run.

3M gives a maximum recommended voltage rating of 606 V for the MA250DMMFK, which covers ordinary 120/208, 240, 277 and 480 V building and equipment circuits. It also carries UL file number E70512.

The MA250DMMFK is RoHS 2011/65/EU compliant without exemption and is manufactured in the United States. That combination is what most institutional and government procurement specs are looking for on terminal hardware.

It comes 500 pieces to a bulk box, so this is a case quantity rather than a single piece or a small bag. That suits MRO cribs, panel shops and service fleets stocking a common repair item; it is a lot of adapter for a one-off fix.

The adapter is dimensioned for wire insulation up to 0.145 inch (3.7 mm) outside diameter. Heavily jacketed or double-insulated leads above that will not seat properly, so check the OD of the insulation, not just the AWG of the conductor.

Two different jobs. The Scotchlok MA250DMMFK couples wires that already have quarter-inch quick-disconnect terminals on them, and it stays separable for service. If you are tapping a run of bare conductor rather than mating finished terminals, that is tap connector territory, such as the Burndy Tapit line with its polyethylene tap connector cover. For bonding intersystem grounds at a wall, neither applies; that is a device like the Burndy BONDIT BDTIBB, rated for #14 to #2 AWG.

They solve different problems. The Burndy UCCOVER1BOX25 is a polyethylene cover for Tapit tap connectors, applied over a completed tap. The 3M MA250DMMFK is the connecting part itself, a tin-plated brass adapter with a non-insulated barrel that mates two 0.25 in quick-disconnect tabs and is rated to 482 degrees F. If a bare 3M adapter needs covering, the Tapit cover is sized for Tapit taps, not for a 0.76 in long disconnect adapter.

No. The RACO 232MSCM is a 4 in. square welded box, 2-1/8 in. deep, with a STAB-IT connector and an M bracket, and it provides the enclosure and mounting for a splice. The 3M MA250DMMFK is the adapter that makes the connection inside, a UL-recognized part under file E70512 supplied 500 per bulk box. On a job with a boxed splice, both can appear together rather than one substituting for the other.