Steve's Miniature Sparkplugs

Home of the worlds smallest production sparkplug

Steve's Miniature Sparkplugs is a very small business dedicated to building quality sparkplugs for the model engineering community. All our plugs are hand made in small batches. Every sparkplug is made using steel bases, Corian for the insulator, and brass for the cap. These materials are widely used by model engineers for the making of sparkplugs. They give a good quality and long lasting alternative to production ceramic plugs.

1/4-32 Side fireThe original "Legacy" sparkplugs made by Dale Detrich. They are just over 1-1/8 inches tall with a 5/16 Hex.$12 USD85 Available Now
1/4-32 TapMade by Greenfield in the USA. GTD HS NEF GH3 K8 Plug$10 USD39 Available Now
#10-40#10 plug with a conventional ground electrode. They are 1 inch tall with a 1/4 inch hex.$15 USD44 Available Now
#10-40 TapGreenfield USA Made NOS from a closed machine shop$10 USD50 Available Now
#10 BootBoot for #10 Spark plugs$5 USD33 Available Now
#8-40#8 plug with a conventional ground electrode. They are 15/16 tall with a 7/32 Hex.$15 USD88 Available Now
#8-40 Side FireThe original "Legacy" sparkplugs made by Dale Detrich. They are about 7/8 inch tall with a 7/32 Hex. When these are gone, there gone.$15 USD26 Available Now
#8 BootBoot for both #8 spark plugs$5 USD6 Available Now
#6-56#6 plug with a conventional ground electrode. This is the smallest production plug in the world. They are only about 11/16 tall with a 3/16 hex.$25 USD8 Available Now
#6 BootBoot for #6 spark plugs$5 USD10 Available Now
#6-56 TapMade by OSG in Japan. High speed steel with a ground thread. GH2 CPMT15 Spiral point Plug$20 USD6 Available Now
Little Demon engine gasketsEngine gasket set for the Little Demon V8 Contains everything except head gaskets$10 USD29 Available Now
Little Demon head gasketsHead gaskets for the Little Demon V8$5 USD29 Available Now
Little Demon blower gaskets Blower Gaskets for the Little Demon V8. Contains blower gaskets and gaskets for the second carb.$10 USD29 Available Now

For information or to purchase sparkplugs email [email protected] If you send a list of what you want and a shipping address I will get back to you with a total price. I take PayPal or you can send a check or money order for payment.


All our plugs are packed in a foam lined plastic box for protection then inserted into a bubble lined envelope for further protection. They are then inserted into an addressed envelope for shipping. I don't want to make money on shipping I just want to cover the cost of the packing material.