| 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) |