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Hi Guys,
Where is the cross reference located that gives later Federal Stock Numbers for the original Ordinance Part Numbers? I keep running into newer parts for M37s and B1's that use the Federal Stock Numbers, but the ORD 9 I use to figure out the correct part numbers for my early M gives Ordinance Numbers. So there must be a way to determine which FSNs replace the older Ordinance Numbers. Where's the secret decoder ring located ????
thanks,
bob
How to Cross Reference FSNs to Ordinance Part Numbers
Moderators: Cal_Gary, T. Highway, Monkey Man, robi
Re: How to Cross Reference FSNs to Ordinance Part Numbers
Cal_Gary
1954 M37 W/W
MVPA Correspondent #28500
G741.org Forum member since 2004
1954 M37 W/W
MVPA Correspondent #28500
G741.org Forum member since 2004
Re: How to Cross Reference FSNs to Ordinance Part Numbers
But what is an NCBC code number that you also have to supply? Where does that come from?
All in Air Force blue and black trim
1962 M37B1 rectangular window hardtop, converted to Hercules 4 cyl diesel-intercooled & turbo charged, 12V, disc brakes
1962 M116A1 Generator trailer
1962 M116A1 Pioneer tool trailer
1964 M101A1 3/4 ton trailer
1962 M37B1 rectangular window hardtop, converted to Hercules 4 cyl diesel-intercooled & turbo charged, 12V, disc brakes
1962 M116A1 Generator trailer
1962 M116A1 Pioneer tool trailer
1964 M101A1 3/4 ton trailer
Re: How to Cross Reference FSNs to Ordinance Part Numbers
The NCBC number mentioned is what is commonly called the "country" code. It was something added to standardize NATO supply stocks in the '70s. US sourced inventory usually have a -00- or -01- whereas non-US items have other codes. For instance, United Kingdom uses -99-, Germany uses -12-, Canada uses -20- & -21-, Australia uses -66-, etc. This way you can look at the NSN and figure out which country uses that item.
Most all the M37 stuff will have a -00- in the NSN since most of it was introduced before 1974.
What I have found that works for a "rule of thumb" most of the time is taking the Ordnance PN (ex. 7371234), breaking it into two groups, a 3 digit & a 4 digit group (ex. 737-1234). The hard part is guessing the correct FSC (Fed stock class), the first 4 digits of the FSN. This number is based off the item descriptor (ie., hardware can be 53xx-, M37 specific can be 23xx, etc.). Add the -00- and I can usually match a modern NSN. The 1960 editions of the parts manuals did a good job of including the FSN with Ord PNs. Sometimes I can find it at the DLA NSN Lookup by just using the 7 digit Ord PN if there is an equivalent item still in the inventory.
Most all the M37 stuff will have a -00- in the NSN since most of it was introduced before 1974.
What I have found that works for a "rule of thumb" most of the time is taking the Ordnance PN (ex. 7371234), breaking it into two groups, a 3 digit & a 4 digit group (ex. 737-1234). The hard part is guessing the correct FSC (Fed stock class), the first 4 digits of the FSN. This number is based off the item descriptor (ie., hardware can be 53xx-, M37 specific can be 23xx, etc.). Add the -00- and I can usually match a modern NSN. The 1960 editions of the parts manuals did a good job of including the FSN with Ord PNs. Sometimes I can find it at the DLA NSN Lookup by just using the 7 digit Ord PN if there is an equivalent item still in the inventory.