Need info on Vietnam Era M1-M2 Carbine spring specifications

[JackP]

Ordnance drawing number 5196466, dated 18 October, 1968 lists the following specifications:

Wire Diameter________ Approx. .036"
Number of Coils_______ 121
O.D. _______________ .256 +-.004"
I.D._________________ Not less than .179"
Free Height__________ 10.28"
Type of ends_________ squared and ground

FYI, 7312453 is the operating slide stop spring.

Information

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[USGI]

FYI, 7312453 is the operating slide stop spring.

Thanks for solving that mystery for me! I had printed the "Table of Contents" for one of the Nicolaus books from the Carbine Club site the other day - found the reference to "Chapter 3 - Operating Slide" and assumed (I know!) that the spring shown there must be the OP Slide Spring. Oops! Just rechecked, and now see the correct spring just above in the "Chapter 2" grouping. You must have determined the "wire diameter" by calculating - same as I had to do? That's the only dimension that's in spec for the springs I had in question. - Bob