NGK 4129 - Alternative spark plugs
There are 40 replacement spark plugs for NGK 4129. The cross-references are for general reference only; please check the correct specifications and measurements for your application. When you click on links to various retailers on this page and make a purchase, this site may earn a commission. Affiliate programs and partnerships include Amazon Associates.
- Thread diameter: 14.0 mm
- Thread reach: 19 mm
- Hex size: 20.8 mm
Specifications for NGK 4129
NGK 4129 on Amazon
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When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network and Amazon Associates.
Replacement spark plugs for NGK 4129 on Amazon
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Applications of NGK 4129
| Brand | Model | Engine size | HP | KW | Year | Engine | # of cyl | Spark plug gap |
|---|---|---|---|---|---|---|---|---|
| B.S.A. | C10 Alu Head | 250 | 1938 - 1953 | 1 | 0.5 | |||
| B.S.A. | M20 Alu Head | 496 | 1937 - 1955 | 2 | 0.5 | |||
| B.S.A. | M21 Alu Head | 591 | 1937 - 1963 | 2 | 0.5 | |||
| B.S.A. | M21 Alu Head | 591 | 1937 - 1963 | 2 | 0.5 |
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The cross-references are for general reference only; please check the correct specifications and measurements for your application. When you click on links to various retailers on this page and make a purchase, this site may earn a commission. Affiliate programs and partnerships include Amazon Associates.