WWII Tool/Fixture

Some type of tool in a case. Has the number 41-F-2987-450 on it. I've tried for awhile to locate the number in manuals/books online, but nothing really matches, even with numbers close to it.

The piece that swivels is threaded for something to attach underneath.

Any ideas on what it was used for? Thanks for looking.

 

looks like a crude strength tester....

 

could be a press or flaring tool...worked for a while searching contract number but came up empty like you did....

 

Bigger than a breadbox?

 

Without even knowing whether this thing is pocket-sized or more the size of a steamer trunk, I can tell you it is a maintenance or repair fixture for use by Army fifth-echelon or higher. The letter in these numbers tells a lot, F is for fixture, G for gage, W for wrench, R for reamer, etc. so troops in the field would never see one of these, but headquarters repair shops probably would. It could be for use on ordnance or vehicles, I dunno.

 

Rough reaming of the bore of something?

 

I think an auto or truck mechanic might recognize this fixture, but most anyone would want to know the dimensions.

 

The number 41-F-2987-450 is (was) an actual Army part number for that particular fixture.

 

Similar

 

It measures 20 inches long. One plate has threaded holes, while the other are just pass through for the bolts, so I think something is supposed to go inbetween them. There is also a smaller bolt with a hole down the middle. The textured swivel piece looks like it might take attachments, or screw into whatever its supposed to lift/lower/pull.

It seems like the only way to secure the main piece is that cut out half circle section to slide it flush against something. No other screw holes/attachment points.

 

I would think it to not be a press because of the fine threads and the knurling is surely for cleaning/scoring the inside of something

 

I’d suggest that the knurling serves the usual purpose of allowing the mechanic to grip it better when he hand-tightens it onto the male threads of whatever goes on the end.

 

Ah! Good option!
~
I would expect some starting taper if used as I suggested.