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BC P R 6 E S - 11
A
P F R 6 A - 11
Thread
Hexagon
Size
Size
A
18 mm
25.4 mm
B
14 mm
20.8 mm
C
10 mm
16.0 mm
D
12 mm
18.0 mm
E
8 mm
13.0 mm
G
PF 1/2
23.8 mm
J
12 mm
18.0 mm
AB
18 mm
20.8 mm
BC
14 mm
16.0 mm
BK
14 mm
16.0 mm
(Iso type of BCP)
DC
12 mm
16.0 mm
Construction Feature
L
Compact type (Shorty)
M
Compact type (Bantam)
P
Projected insulator type
R
Resistor Type
U
Surface or semi surface
discharge type
Z
Inductive resistor type
Heat Rating Number
2
Hotter
4
5
6
7
8
(85)
9
(95)
10
(105)
11
12
13
Colder
Thread Reach
E
19.0 mm
H
12.7 mm
L
11.2 mm
EH
Half thread
Total:
19.0 mm
Thread:
12.7 mm
F
Conical seat type
A-F type 10.9 mm
B-F type 11.2 mm
B-EF type17.5mm
Plug type
I
Iridium electrode
P
Platinum electrodes
L
Thread reach 26.5 mm
Z
Extended gap
PL
Platinum electrodes and
Thread reach 26.5 mm
PZ
Platinum electrodes and
extended gap
IZ
Iridium electrodes and
extended gap
Metal Shell Size
F
14 ø 19 mm , 16.0 mm Hex
G
14 ø 19 mm , 20.8 mm Hex
J
12 ø 19 mm , 18.0 mm Hex
K
12 ø 19 mm , 16.0 mm Hex
M
10 ø 19 mm , 16.0 mm Hex
T
Conical seat type
14 ø 17.5 mm , 16.0 mm Hex
(PTR5A: 14 ø 25 mm , 16.0 mm Hex)
Construction
R
Resistor
Construction
A
Special design
B
Special design
C
Special design
D
Special design
Feature
A
No gasket type
B
Special
C
Special
D
Special
Firing End Construction, etc.
C
Low angle ground electrode
F
Conical seat
G
Fine nickel alloy center electrode
GV
Gold-pelladium center electrode and
special construction
J
Extended 2-Ground electrodes
K
2-Ground electrodes
M
2-Ground electrodes for Mazda rotary
eng. or Insulator length: 18.5 mm
T
3-Ground electrodes
Q
4-Ground electrodes
P
Platinum electrode
S
Copper core center electrode
U
Semisurface discharge type
V
Gold-palladium center electrode
VX
platinum center electrode & special
ground electrode
W
Thungsten electrode
X
Booster gap
Y
V-Grooved center electrode
A, B, D, E, Z
Special design
-L
Half heat range
-LM
Compact type
(insulator length: 14.5 mm)
-N
Special ground electrode
IX
Iridium
Spark gap (mm)
Spark gap (mm)
None: Standard gap
None: Standard gap
* Standard regulation is drawn here. There also exists a few extraordinary symbols.
NGK Spark Plug Decoder
557