Call +44(0) 1477 532 317
Technical

18mm Diameter

Items 1 to 12 of 314 total

per page

Page:
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

Items 1 to 12 of 314 total

per page

Page:
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

18mm Diameter

18mm Diameter spark plugs from popular manufacturers including Bosch, NGK, Champion and Denso.

To find the right spark plug for your vehicle try our Spark Plug Finder

Shop By

Shopping Options

Reach
  1. 10.9mm (0.42") (78)
  2. 11.2mm (7/16") (1)
  3. 11.6mm (.460") (8)
  4. 12.7mm (1/2") (164)
  5. 13.5mm (0.53") (6)
  6. 16mm (5/8") (2)
  7. 17.5mm (0.708") (1)
  8. 18mm (11/16") (5)
  9. 19mm (3/4") (12)
  10. 20.3mm (0.79") (1)
  11. 20.6mm (0.81") (2)
  12. 25.4mm (1") (3)
Manufacturer
  1. AC (17)
  2. Beru (11)
  3. Bosch (54)
  4. Champion (107)
  5. Denso (11)
  6. KLG (27)
  7. Lodge (29)
  8. Motorcraft (29)
  9. NGK (24)
  10. Rare & Collectors (3)
  11. Splitfire (1)
  12. Unipart (1)
Hex Spanner Size
  1. 20.8mm (13/16") (132)
  2. 22.2mm (7/8") (44)
  3. 25.4mm (1") (112)
Terminal Type
  1. 2BA Thread (6)
  2. Fixed Terminal (22)
  3. M4 Thread (179)
  4. UNC Thread (76)
Resistor
  1. No (242)
  2. Yes (24)
Seal Type
  1. Gasket Seat (153)
  2. Tapered Seat (110)
  3. Tapered Thread (3)
Projection Type
  1. Non Projected (174)
  2. Projected (92)
Electrode Material
  1. Copper Core (54)
  2. Double Copper Core (1)
  3. Gold Palladium (6)
  4. Platinum (14)
  5. Silver (1)
  6. Standard Nickel (218)
  7. V Grooved (1)
Tip Configuration
  1. Hesselman (5)
  2. Multi Electrode (15)
  3. Single Electrode (259)
  4. Surface Gap (1)
  5. Triple Electrode (2)
  6. Twin Electrode (4)
Applications
  1. Industrial (30)
  2. Racing (10)
  3. Rare And Collectors (3)
  4. Screened Type (3)
Recently Viewed Products

  1. Champion Standard Spark Plug UD16

  2. Champion Industrial Spark Plug W80N

  3. Spark Plugs Motorcraft Autolite A1X

  4. Spark Plugs Autolite A7

  5. Chinese Brand Torch & NHSP LD Spark Plugs D8C :- Replace With NGK D8EA

NGK Part Finder
Show all vehicles
About GSP
Green Spark Plug

Green Spark Plug Co. Ltd has now added a dedicated sales and distribution team to handle customers questions and pre-sales enquires, we are experts in our field so if you have a query let us know!

Read More About Us
Categories
Our 3 Customer Promises
1

Fast Delivery - Products in stock for same day dispatch. Cut off 1pm GMT. (Supply permitting)
* Applies to UK Mainland only

2

Est 1980 - Over one million spark plugs sold. Call us for technical advice
+44 (0) 1477 532 317

3

Shop With Confidence - Guaranteed low prices. 30 day no hassle returns.

Company Info

Call Us +44 (0) 1477 532 317
(9-5 Mon-Fri) GMT

Unit 2
King Street Trading Estate
Middlewich
Cheshire
CW10 9LF

[email protected]
[email protected]

Contact Form