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US MIL SPEC MS27212P “Terminal Board Assembly, Moulded in Stud, Electric

 

 

A good general terminal block series, from #6 up to 3/8”. Supplied without nuts and washers, so the user has to add these.  Usually supplied in a fixed length and number of studs dependent upon the size. Cut to length using a hacksaw. The spacing is a bit wide in #6 and #8 size, so when using in a junction box, the box tends to be rather large.

 

The mounting method is strange as you have to install captive nuts in the blocks and attach from the reverse side, so not idea if mounting off a stringer in front of a skin. Matching bus bars are also available (MS25226) which line up with the mounting holes.

 

The bus bar is also available in size #8 with a pitch of ¾” which is idea for use with circuit breakers as a bus bar. The busbars, manufactured from copper, are available in a range of finishes, but usually only available in Cadmium plate. Separate covers are also available where the blocks are used in the open airframe.

 

Term Block MS27212P

 

Bus Bar MS25226D

 

Insulator MS3373