Association of American Railroads M-205-38 to M-306-38.
Material Specifications:
M-205-38. Coupler Yokes.
M-206-40. Acceptance of A.A.R. Tight Lock Couplers and Coupler Parts, Radial Connections, Yokes, and Attachment Parts.
M-251-29. High Chrome Steel Castings for Valves for Nitric Acid Tank Cars.
M-301-37. Iron and Steel Chain.
M-302-40. Refined Wrought Iron Bars.
M-304-39. Staybolt Iron, Hollow Rolled.
M-305-39. Staybolt Iron, Solid.
M-306-38. Welded Wrought Iron Pipe.
Association of American Railroads
Material Specification: M-205-38.
Coupler Yokes.
Association of American Railroads
Material Specifications M-206-40.
Acceptance of A.A.R. Tight Lock Couplers and Coupler Parts, Radial Connections, Yokes, and Attachment Parts.
Association of American Railroads
Material Specifications M-251-29.
High Chrome Steel Castings for Valves for Nitric Acid Tank Cars.
Association of American Railroads
Material Specifications M-301-37.
Iron and Steel Chain.
Association of American Railroads
Material Specifications: M-302-40.
Refined Wrought Iron Bars.
Association of American Railroads
Material Specifications: M-304-39
Staybolt Iron, Hollow Rolled.
Association of American Railroads
Material Specifications: M-305-39
Staybolt Iron, Solid.
Association of American Railroads
Material Specifications M-306-38.
Welded Wrought Iron Pipe.
