anybody have a M105 trailer lunette ring available for measurement?

[Tobiasinla]

Thanks for posting that info. I have what i thought was a spare M101 offset lunette, but measuring it seems to indicate that it's am M105 lunette.

Shank length: 8.25"
Ring inside diameter: 3"
Thread length: 2-5/16"
Taper length: 5-7/8"
Thread diameter: 1-1/8"
Ring outside diameter: 6.25"

Well, for the future searches, here is the M416

NSN 2540007328311
ITEM NAME COUPLER,DRAWBAR,RING
THREAD DIRECTION RIGHT-HAND
SHANK LENGTH 6.750 INCHES NOMINAL
RING INSIDE DIAMETER 2.969 INCHES MINIMUM AND 3.062 INCHES MAXIMUM
THREAD LENGTH 1.375 INCHES
TAPER LENGTH 0.938 INCHES NOMINAL
THREAD SIZE 7/8 IN.-14
COTTER PIN HOLE DIAMETER 0.172 INCHES NOMINAL
RING OUTSIDE DIAMETER 6.156 INCHES MINIMUM AND 6.344 INCHES MAXIMUM
SCREW THREAD SERIES DESIGNATOR UNF
TAPER PER FOOT 3.500 INCHES NOMINAL
SHANK END THREAD PROVISION THREADED

 

[e9999]

well, I got myself a NOS M105 coupler ring. Dang that thing is big. 20+lbs of steel.
If that helps some folks later on, below are the various parts numbers depending on the manufacturer. The NSN is of course the same for all. Note that the older superseded NSN number based on the NIIN is still used in various places. Note the various parts numbers (e.g. 7354577 etc), those are cast or stamped on the lunette shank and help with IDing the part and its manufacturer.

The dimensions given by TobiasinLA above appear to match what I have. I have added a pic similar to that of the 101 above to help folks with identification.

Note also that the 1 1/8"x16 nut is an odd thread and somewhat hard to find in OEM form (kindly let me know if you have a good source), but appears to be a standard size for semi trucks wheels if you need one in a pinch (but won't be castellated of course).


---------------------------
http://www.parttarget.com/2540-00-999-5584_2540009995584_2540009995584.html

some of the info in case the link goes dead:

----

2540-00-999-5584 (2540009995584) NSN Information
NSN FSC NIIN Item Name INC
2540-00-999-5584 2540 009995584 Coupler, Drawbar, Ring 19449
2540-00-999-5584 Manufacturing Part Numbers (SKUs)

2540-00-999-5584 Manufacturer
MFG SKU CAGE Manufacturer Type Status Role
14-503 72865 Copco Trailer Div. Copco Steel And A A
2540009995584 SCY13 E.C.A Etablissement Central DES E A
A-A-52464B 58536 Federal Commercial Item Description A M
296337 23705 Fruehauf Corp. A H
A52464-3 96906 Military Standards A M
MS51339-3 96906 Military Standards A M
11592597 19207 U S Army Tank Automotive Command A A
7354577 19207 U S Army Tank Automotive Command A A

2540-00-999-5584 Replaces the Following Cancelled NSN
Cancelled NSN Cancelled NIIN
2540-00-735-4577 007354577

 

[Degnol]

e, glad you scored. I have the complete hitch for a M101 or 105, bent lunette I was going to offer.....

 

[e9999]

e, glad you scored. I have the complete hitch for a M101 or 105, bent lunette I was going to offer.....

thanks
PMd you

 

[Degnol]

Well, here are some pics. It has the landing leg, which could be removed for shipping. Dunno.

 

[Tobiasinla]

e, glad you scored. I have the complete hitch for a M101 or 105, bent lunette I was going to offer.....

Looks like you have the M101A1 setup. Did you throw a tape measure on it yet? (Just the taper would tell.) Also though the 105's had dolly wheels, but not sure if they all did.

Does the drawbar ( or "mating female receiver") have any casting numbers on it?

 

[scrapdaddy]

That's a M101 A1 lunette, you are right the 105, has wheels on the landing leg. Some had one big wheel and others had two smaller wheels.

 

[Degnol]

Looks like you have the M101A1 setup. Did you throw a tape measure on it yet? (Just the taper would tell.) Also though the 105's had dolly wheels, but not sure if they all did.

Does the drawbar ( or "mating female receiver") have any casting numbers on it?

The measurement from the stop to the end of the threads is 6 1/4" and the casting on the female part is 7339350 with MT. 5 underneath.

Looks like M101A1