STANAG 4074 auxiliary power unit connections for tactical land vehicles

What it is

STANAG 4074 is the NATO Standardization Agreement covering auxiliary power unit connections for starting tactical land vehicles - the plug and receptacle used to slave-start one vehicle from another, or from a ground power unit. This is Edition 3, promulgated 14 September 2017. The document states it supersedes an earlier edition of STANAG 4074, without giving that edition's number.

A STANAG is not the specification

A STANAG is the agreement by which NATO nations commit to implement a standard, not the technical specification itself. STANAG 4074's own text is short and administrative: an aim, one interoperability requirement, and the ratification and reporting machinery. The connector's actual dimensions and basic characteristics are specified in a separate publication, AEP-4074 Edition A, which the STANAG names as the standard participating nations "agree to implement". Anyone designing, building or checking the connector itself needs AEP-4074's own text, not this cover agreement.

What it commits nations to

The stated aim is "to respond to the following interoperability requirements", and the single requirement given is "to standardize the dimensions and basic characteristics of the auxiliary power unit connections for starting tactical land vehicles in use in the armed forces of NATO". The document also lists five existing national items for the same hardware under "Other Related Documents": two US Army drawings (a slave receptacle assembly and a slave electrical connector plug assembly), two British drawings (a receptacle connector and a plug connector), and a VG-numbered standard for a two-pole electrical connector and plug-and-socket device. These are named for reference; the STANAG does not say the AEP-4074 connector must match any one of them.

Who it binds, and how

STANAG 4074 binds nations, not suppliers. It is "effective upon receipt and ready to be used by the implementing nations and NATO bodies", and it becomes binding on a given nation through ratification, which NATO records in the NATO Standardization Document Database (NSDD) - the Letter of Promulgation states the agreement "has been ratified by member nations, as reflected in" that database. Partner nations are separately "invited to adopt this STANAG". Implementation is a further step: "nations are to issue the necessary orders/instructions to the forces concerned, putting the procedures detailed in the agreement into effect", and nations then report their effective implementation "using the form at Annex H to AAP-03(J)"; partner nations report adoption the same way through Annex G. A supplier meets STANAG 4074, or the AEP-4074 dimensions it covers, only where a contract or tender says so - the document itself sets no obligation reaching a supplier directly.

How it's evaluated

STANAG 4074 describes no certification scheme and no audit. What it describes is nations reporting their ratification and implementation status to the NSO for the record, both recorded in the NATO Standardization Document Database; nobody is "STANAG 4074 certified", and the document never uses that language. Where a connector's dimensions do get checked against AEP-4074 in practice - drawings, inspection records - the assessor and the evidence required are set by the contract's own quality clause, not by this STANAG. The only other stated check is a periodic review of the STANAG itself: "This STANAG is to be reviewed at least once every three years. The result of the review is recorded within the NSDD." Nations and NATO bodies may also propose changes "at any time, through a standardization proposal to the tasking authority (TA)".

Standards it references

STANAG 4074 covers AEP-4074, the Allied Engineering Publication that carries the connector's actual dimensions and characteristics. Reviews and reporting under this STANAG run through forms held in AAP-03. Its "Other Related Documents" also name US Army Drawing Number 7321299, US Army Drawing Number 7728882, British Drawing Number FV 634272, British Drawing Number FV 564833, and VG 96917, all outside our catalogue and named here in the document's own terms only.