scope:

This specification covers two series of electrical, rectangular connectors with crimp type removable contacts. These connectors are provided with single, dual, triple, and quadruple insert shell configurations.

Connectors covered by this specification shall be of the following types, classes, series and shell designators.

The connector type shall be identified as follows:

Type I - Short grommet seal (series 1 only).

Type II - Standard grommet seal.

Type III - Without grommet seal.

Type IV - Without interfacial and grommet seals.

The connector class shall be identified as follows:

Class 1: −65°C to +125°C.

Class 2: −65°C to +200°C.

The military part number shall consist of the letter "M", the basic number of the specification sheet, and coded numbers or letters as shown in the following example:

The basic part number shall be as shown on the applicable military specification sheet. Revision letters shall not be included.

The shell designator shall consist of a letter in accordance with the following:

A - A connector having a shell configuration to accommodate a keystone insert.

B - A connector having a shell configuration to accommodate a rectangular insert.

The series designator shall consist of a one digit number in accordance with the following:

Series 1 - Front release contacts.

Series 2 - Rear release contacts.

The insert designator shall consist of a four digit number as shown on MS3157.

The polarization position of the connector shall be in accordance with table I. Polarizing hardware is depicted in figure 1a and 1b. All connectors shall be supplied with the polarizing hardware shipped loose. Polarization shall be accomplished by the user and the position number marked on the connector shell following the military part number (1.3).

Wire range accommodations of the contacts shall be as shown in table II. TABLE II. Wire range accommodations.

Wire barrel Wire Insulation diameter sizes size range (inches) ----------------------------------------------- 22 26, 24, 22 .030 to .054 20 24, 22, 20 .040 to .071 16 20, 18, 16 .068 to .103 12 14, 12 .097 to .135