MIL-SPEC · M85049/51Updated 2026-10-03
M85049/51-1-18N
/51 designates a 90° strain relief backshell (supersedes MS3418). The '-1' indicates a non-self-locking coupling style. The '-18' refers to the dash number, which specifies the connector shell size. The 'N' specifies the material and finish as Aluminum with an electroless nickel plating. M85049 is a US aerospace/military hardware standard for backshells and cable clamps, which has been superseded by AS85049.
Part number dissection
M85049M85049 is a US aerospace/military hardware standard for backshells and cable clamps, which has been superseded by AS85049.
/51-1-18/51 designates a 90° strain relief backshell (supersedes MS3418). The '-1' indicates a non-self-locking coupling style. The '-18' refers to the dash number, which specifies the connector shell size.
NThe 'N' specifies the material and finish as Aluminum with an electroless nickel plating.
Specifications
Base code/51 designates a 90° strain relief backshell (supersedes MS3418). The '-1' indicates a non-self-locking coupling style. The '-18' refers to the dash number, which specifies the connector shell size.
Finish / variantThe 'N' specifies the material and finish as Aluminum with an electroless nickel plating.
Acceptable alternates
M85049/51-1-18AThis variant has an 'A' suffix, indicating an Aluminum, black anodize finish, which is an alternative to the 'N' (electroless nickel) finish for the same backshell type and size.
M85049/51-1-18WThis variant has a 'W' suffix, indicating an Aluminum, olive drab cadmium finish, which is an alternative to the 'N' (electroless nickel) finish for the same backshell type and size.
M85049/51-1-18SThis variant has an 'S' suffix, indicating a Stainless steel, passivated finish, which is an alternative to the 'N' (electroless nickel) finish for the same backshell type and size.
Confirm acceptability against your drawing before ordering.
Availability
Lead timeQuoted on request
TraceabilityFull documentation with every shipment
BTEK sources through registry-verified producers and authorized channels. Certs of conformance travel with the parts.
Price on request — confirmed same day.
Get a quote in minutes.
Quantity and target date. BTEK's quoting engine sources, prices and replies by email.
BTEK Components MFG LLC · Largo, FloridaPart data compiled and verified by BTEK's sourcing engine.