scope:

This specification covers multicontact connectors for 1/16-, 3/32-, and 1/8-inch printed wiring boards, and for interconnections between printed wiring boards. The connectors are intended to provide a reliable connection between printed wiring and conventional wiring. The interconnector concept is intended to provide connection of printed wiring on one board to printed wiring on another board.

Connectors covered by this specification shall be classified by physical characteristics as indicated by type, style, class, size, and-mounting provision (see 3.1).

The type is identified as follows:

Types A and AD (card insertion connectors). Connector receptacles containing two contacts within each contact cavity, each of which engages a contact on an opposite side of a printed wiring board. In type A connectors, the two contacts in each cavity are electrically common. In type AD connectors, the two contacts in each cavity are electrically isolated from each other.

Type CR (receptacle). Composite connector having a solder type or removable crimp type female contact inserted into and mechanically retained in a receptacle housing, or composite contacts mounted on individual intermating printed wiring boards. Type CR contacts mate with type CS contacts.

Type CS (adapter). Composite connector having individual contacts attached to a printed wiring board or retained in an assembly attached to a printed wiring board. Type CS contacts mate with type CR contacts.

The style of the connector shall be identified by a two-digit number which signifies the number of contact positions in the connector.

The class is identified by a single-letter symbol which denotes the kind of termination in accordance with table I. TABLE I. Class.

Symbol Termination ---------------------------------------------- a- - - - - - Straight, eyelet, solder b- - - - - - Straight, plug-in, solder c- - - - - - Removable crimp or solder

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Space and Naval Warfare Systems Command, Department of the Navy, Washington, DC 20363 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

The size is identified by a single-digit symbol which indicates the thickness of the applicable mating printed wiring board in accordance with table II. TABLE II. Size.

Symbol Thickness of printed wiring board -------------------------------------------------- 2 1/16-inch (.054 - .070) 3 3/32-inch (.084 - .103) 4 1/8-inch (.115 - .135)

The mounting provision is identified by a single-letter symbol in accordance with table III. TABLE III. Mounting provision.

Symbol Mounting provision --------------------------------------------------------- A - - - - Clearance holes of specified diameter at both ends of the connector. B - - - - Tapped insert of specified thread at both ends of the connector. C - - - - Floating feed-through bushing of specified dimensions at both ends of the connector. D - - - - Contacts composite (individual) attached to printed wiring board by mechanical staking prior to soldering.

The military part number shall consist of the letter "M", the basic number of the specification sheet, and an assigned dash number (see 3.1) as shown in the following:

intended Use:

These are one piece PWB connectors and do not meet the requirements of two piece PWB connectors as defined in MIL-STD-275E. These connectors are intended to terminate directly to the PWB.