1. Resistor |
None--No Resistor |
R--Mil-Spec. Resistor-Erosion protection |
2. Barrel Style |
None -- Unshielded |
E -- Shielded 5/8"-24 Thread |
|
H -- Shielded 3/4"-20 Thread (All Weather Plug) |
3. Mounting Thread -- Reach -- Hex Size |
B-18mm 13/16" / 2.06cm 7/8" / 2.22cm |
M--18mm 1/2"/1.27cm 7/8"/2.22cm |
|
L-14mm 1/2"/1.27cm 13/16/2.06cm |
U18mm 1-1/8"/2.85cm 13/16/2.06cm |
|
J -- 14mm 3/8"/0.95cm 13/16/2.06cm |
4. Heat Rating Position |
Low number--cold |
High number--hot |
5. Electrode Design |
None-Conventional single |
E -- Two prong massive
N -- 4 prong massive |
|
W -- Fine wire (Iridium) |
B --2 prong massive, Tangent to Center |
|
P--Fine wire (Platinum) |