scope:

This specification relates to a range of multi-contact, bayonet coupled plugs and sockets with crimped, rear insertion/front release, removable contacts or soldered non-removable contacts. Both types are intermateable with each other. Polarization is achieved by varying the angular position of the contact insert. The coupling rings are captive free rotating. A visible and audible locking check is provided when connectors are mated.

Outlet accessories, which will provide complete sealing, positive shielding and screen termination, are available for use with the Standard Range of Pattern 121B plugs and sockets. These are listed in DEF STAN 59 - 35 (PART 1) Section 8A.

This specification gives details of dimensions, ratings, and test values peculiar to the range of standard items defined.

To ensure compliance with this specification, connectors shall always have a full complement of contacts fitted, with filler plugs behind unwired contacts.