UR-437

Rectangular

4.081 inches minimum and 4.116 inches maximum

Not casehardened

4.531 inches minimum and 4.566 inches maximum

0.044 inches minimum and 0.048 inches maximum

Special

Internal

211000.0 pounds per square inch minimum tensile

Steel, fed std 66, comp 1070 or steel, fed std 66, comp 1072 or steel, fed std 66, comp 1074 or steel, fed std 66, comp 1075 or steel, fed std 66, comp 1078 or steel, fed std 66, comp 1080 or steel, fed std 66, comp 1084 or steel, fed std 66, comp 1085 or steel, fed std 66, comp 1086 or steel, fed std 66, comp 1090

Steel comp 1070 or steel comp 1572 or steel comp 1074 or steel comp 1075 or steel comp 1078 or steel comp 1080 or steel comp 1070 or steel comp 1085 or steel comp 1086 or steel comp 1090

Fed std 66, comp 1070 fed std 1st material response and fed std 66, comp 1072 fed std 2nd material response and fed std 66, comp 1074 fed std 3rd material response and fed std 66, comp 1075 fed std 4th material response and fed std 66, comp 1078 fed std 5th material response and fed std 66, comp 1080 fed std 6th material response and fed std 66, comp 1084 fed std 7th material response and fed std 66, comp 1085 fed std 8th material response and fed std 66, comp 1086 fed std 9th material response and fed std 66, comp 1090 fed std 10th material response