The MTK Cylindrical "PI" RFI/EMI Filter current is 50 Amps 115 VAC 0-400 Hz 400 VDC 40 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: 2.25
Length:  4.00
A:  .56
B:  .88
C:  .88
Thread:  1 1/8-18
Flats: 1.062
Terminal Hole Size:  
Terminal Thread Size:  1/4-20