The MTK Cylindrical "PI" RFI/EMI Filter current is 3 Amps 250 VAC, 0-400 Hz, 600 VDC 80 DB MIN @ 0.15 MHZ and, is:
 
Designed, manufactured an tested to the applicable portions of MIL-F-157333.
Filter hermetically sealed.
Case: Metal, suitably plated to withstand corrosion.
 
Dimensions
Dia: 1.75
Length:  4.50
A:  .50
B:  .69
C:  .69
Thread:  3/4-20
Flats: .656
Terminal Hole Size:   
Terminal Thread Size: 8-32