The MTK Cylindrical "PI" RFI/EMI military style filter current is 20 Amps 125 VAC 0-400 Hz 400 VDC 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
Style:  FL84
Military equivalent: M15733/41-0002
Dia:   1.395 Max
Length:  4.562 Max
A:  .656 Max
B:  .66 Nom
C:  .66 Nom
Thread:  3/4-20
Flats:  .655 Nom
Terminal Type & Size:  Tapped Bar
Terminal Thread Size: