NGK TR8IX 3691 Spark Plug

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Rating

3.8 / 5 Overall
NGK	TR8IX
Brand	Code
4.0 / 5 Materials
Copper	Iridium
Ground electrode	Center electrode
3.5 / 5 Design
Standard	Fine Wire
Ground type	Center type

Specifications

1mm (.039")	8
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
18mm (.709")	16mm (5/8")
Reach	Hex size
Tapered	Solid
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Cross-reference (1)

Alternative spark plugs found in cross-reference docs provided by manufacturers

IT24

Copper-Iridium

4.3/ 5

.031"17.5mm, ⌀14x1.25HR 24

Deep reference (2)

A second level of cross-reference: if A=B and B=C, then A=C

R5724-8

Copper

3.1/ 5

.020"18mm, ⌀14x1.25HR 8

B8EFS

Copper

2.9/ 5

.028"18mm, ⌀14x1.25HR 8