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Thread Diameter and Hex Size
< Thread Diameter x Hex Size > (mm)
|
| M |
--- |
18 x 25.4 (Reach: 12mm) |
| L |
--- |
18 x 22.2 (Reach: 12mm) |
| MW |
--- |
18 x 20.6 (Reach: 12mm) |
| MA |
--- |
18 x 20.6 (Tapered seat, Reach: 12mm) |
| FK+ |
--- |
High Ignitability Plug (0.55mm Ir center electrode, Pt ground electrode) |
| J* |
--- |
14 x 20.6 (Projected plug) |
| K+ |
--- |
14 x 16.0 (Miniature plug) |
| KJ*+ |
--- |
14 x 16.0 (Projected miniature plug) |
| LP* |
--- |
14 x 20.6 (Plug for LPG applications) |
| P* |
--- |
14 x 20.6 (Platinum plug) |
| PK* |
--- |
14 x 16 (Miniature platinum plug) |
| PKJ* |
--- |
14 x 16 (Projected miniature platinum plug) |
| PQ* |
--- |
14 x 16 (Miniature platinum plug) |
| Q* |
--- |
14 x 16 (Miniature plug) |
| QJ* |
--- |
14 x 16.0 (Miniature projected plug) |
| QL* |
--- |
14 x 20.6 (Miniature long cylinder housing plug) |
| S* |
--- |
14 x 20.6 (0.7mm diameter iridium) |
| S |
--- |
14 x 20.6 (Surface gap plug (for RE engines)) |
|
| SK+ |
--- |
14 x 16 (0.7mm diameter miniature iridium plug) |
| SKJ*+ |
--- |
14 x 16 (Projected 0.7mm diameter miniature iridium plug) |
| SV |
--- |
0.4mm diameter iridium with platinum ground electrode |
| T |
--- |
14 x 16.0 (Tapered seat) |
| TR@ |
--- |
14 x 20.6 (For marine applications) |
| W |
--- |
14 x 20.6 |
| |
--- |
14 x 19.0 (Compact type) |
| X |
--- |
12 x 18.0 |
| XE |
--- |
12 x 14.0 |
| XU |
--- |
12 x 16.0 |
| U |
--- |
10 x 16.0 |
| U |
--- |
10 x 14.0 (U20M-U Only) |
| N |
--- |
10 x 16.0 |
| Y |
--- |
8 x 13.0 |
| Z |
--- |
1/2PF x 23.8 |
| Z |
--- |
0.55 mm diameter iridium |
* --- Reach: 19.0
+ --- ISO compatible
@ ---Reach: 12.7
|
|
| Heat Range |
| DENSO |
NGK |
CHAMPION |
BOSCH |
| 9 |
2 |
18 |
10 |
| 14 |
4 |
16,14 |
9 |
| 16 |
5 |
12,11 |
8 |
| 20 |
6 |
10,9 |
7,6 |
| 22 |
7 |
8,7 |
5 |
| 24 |
8 |
6,63,61 |
4 |
| 27 |
9 |
4,59 |
3 |
| 29 |
9.5 |
57 |
|
| 31 |
10 |
55 |
2 |
| 32 |
10.5 |
53 |
|
| 34 |
11 |
|
|
| 35 |
11.5 |
|
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|
|
|
Reach
|
| A |
--- |
19mm
(Electrode position: 7mm) |
| |
--- |
21.5mm |
| B |
--- |
19.0mm
(Electrode position: 9.5mm) |
| C |
--- |
19.0mm
(Electrode position: 5.0mm) |
| D |
--- |
19.0mm (Shroud: 2mm) |
| E (With gasket) |
--- |
19.0mm
20.0mm |
| E (Taper seat) |
--- |
17.5mm |
| F |
--- |
12.7mm |
| FE |
--- |
19.0mm (Half thread) |
| G |
--- |
19.0mm (Shroud: 2.8mm) |
| |
--- |
19.0mm (Shroud: 3.0mm) |
|
| H |
--- |
19.0mm
(Electrode position: 8.5mm) |
| |
--- |
26.5mm |
| L |
--- |
11.2mm |
| M |
--- |
8.6mm |
N
(Taper seat,
HALF THREAD) |
--- |
17.5mm |
V
(Tapered seat) |
--- |
25.0mm |
| None |
--- |
9.5mm
11.2mm
19.0mm
21.5mm |
| None (Tapered seat) |
--- |
8.3mm
11.2mm
11.2mm |
|
|
|
Shape (Type)
|
| A |
--- |
Double ground electrodes |
| A |
--- |
Oblique ground electrode (For racing) |
| AY |
--- |
Double ground electrodes with bent shape (special) |
| B |
--- |
Triple ground electrodes |
| BG |
--- |
Triple ground electrodes (shrouded) |
| D |
--- |
Quadruple ground electrodes |
| K |
--- |
1mm Insulator projection |
| LM |
--- |
Compact type (Hex size: 20.6mm) |
| M |
--- |
Shortened insulator head length |
| M |
--- |
Compact type (Hex Size: 19.0mm) |
|
| N |
--- |
Racing type (Nickel electrode) |
| Pt |
--- |
Racing type (Platinum electrodes) |
| P |
--- |
Projected (1.5mm projection) |
| S |
--- |
Non-projected (0mm projection) |
| |
--- |
Iridium on a single side |
| T |
--- |
Double ground electrodes |
| TM |
--- |
Double ground electrodes |
| TN |
--- |
Double ground electrodes |
| V |
--- |
Slant ground electrode |
| X |
--- |
Fully projected (2.5mm projection) |
|
|
|
Internal Construction
|
| R |
--- |
With Resistor |
| None |
--- |
Without Resistor |
< Exception >
S29A, S29 both have Resistors
|
|
|
Shape (Type)
|
| -A |
--- |
Special specification |
| -B |
--- |
Special specification |
| -C |
--- |
Cut-back ground electrode |
| -E |
--- |
Special specification |
| -F |
--- |
Special specification |
| -G |
--- |
Grease applied on to threads, for CNG applications |
| -GL |
--- |
Platinum center electrode |
| -L |
--- |
For CVCC, with a withdrawn insulator |
| |
--- |
3.5mm projected insulator for motorcycles |
| |
--- |
Withdrawn insulator for motorcycles |
| |
--- |
Thin center electrode for motorcycles |
| |
--- |
Heat resistant ground electrode |
| -M |
--- |
Larger ground electrode |
|
| -N |
--- |
For Yamaha and Kawasaki |
| -P |
--- |
Ground electrode has a double layer of platinum |
| |
--- |
Center or ground electrode has platinum |
| -S |
--- |
Semi-surface gap discharge type |
| -S |
--- |
Stainless gasket |
| -TP |
--- |
Platinum on center electrode, with taper cut ground electrode |
| -U |
--- |
U-cut ground electrode |
| -US |
--- |
Star-shaped center electrode is used |
| -V |
--- |
1.3mm diameter nickel center electrode |
| -Z |
--- |
Taper cut |
| -ZU |
--- |
ZU Plug |
|
|
|
Gap
|
| 5 |
--- |
0.5mm (.020'') |
| 8 |
--- |
0.8mm (.032'') |
| 9 |
--- |
0.9mm (.035'') |
| 10 |
--- |
1.0mm (.040'') |
| 11 |
--- |
1.1mm (.044'') |
| 13 |
--- |
1.3mm (.050'') |
| 14 |
--- |
1.4mm (.055'') |
| 15 |
--- |
1.5mm (.060'') |
| 20 |
--- |
2.0mm (.080'') |
< None > Cars: 0.8mm M.C: 0.7mm
< Exceptions > P16R, PQ16R, PQ20R are 1.1mm
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