Which form must be used to order a repair part when no NSN can be determined?

The correct form to use when ordering a repair part and no National Stock Number (NSN) can be determined is NAVSUP Form 1348-6. This form is specifically designed for situations where it is necessary to request a repair part that lacks an NSN, allowing for the identification and procurement of that part through alternate means.

Using the NAVSUP Form 1348-6 facilitates the process by providing the necessary fields to capture essential information such as part descriptions, quantities needed, and other pertinent details that help in the ordering process. This form plays a crucial role in ensuring that even in the absence of an NSN, maintenance operations can still be supported by obtaining the required parts efficiently.