The MTK Cylindrical "L" RFI/EMI Filter current is 3 Amps 100 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
Dia: 1.25
Length:   2.81
A:  .44
B:  .25
C:  .25
Thread:  7/16-20
Flats: .370
Terminal Hole Size:  .09 X .19 Slot
Terminal Thread Size:
Curve:  B