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 Fire
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 USD82 Available Now
1/4-32 Side Fire +1/8These are an exact copy of the sidefire plug with a 1/8 inch longer insulator (2nd in photo)$13 USD9 Available Now
1/4-32 Side Fire +1/4These are an exact copy of the sidefire plug with a 1/4 inch longer insulator (3rd in photo)$14 USD8 Available Now
1/4-32 Side Fire +3/8These are an exact copy of the sidefire plug with a 3/8 inch longer insulator (4th in photo)$15 USD9 Available Now
1/4-32 Updated Side Fire
1/4-32 Updated Side FireThese are an newer version of the sidefire plug with a modern insulator and cap that are compatable with the 1/4 inch boot.$12 USDMore coming soon
1/4-32 Updated Side Fire +1/8These are an exact copy of the Updated sidefire plug with a 1/8 inch longer insulator (2nd in photo)$13 USD3 Available Now
1/4-32 Updated Side Fire +1/4These are an exact copy of the Updated sidefire plug with a 1/4 inch longer insulator (3rd in photo)$14 USD4 Available Now
1/4-32 Updated Side Fire +3/8These are an exact copy of the Updated sidefire plug with a 3/8 inch longer insulator (4th in photo)$15 USD3 Available Now
1/4-32 Surface Discharge
1/4-32 Surface DischargeThey are just over 1-1/8 inches tall with a 5/16 Hex (Same as sidefire). The gap is aprox. .023 and is not adjustable. They also have a new insulator and cap design that makes them compatable with the 1/4 inch insulating boot.$12 USD3 Available Now
1/4-32 Surface Discharge +1/8These are an exact copy of the surface discharge plug with a 1/8 inch longer insulator (2nd in photo)$13 USD3 Available Now
1/4-32 Surface Discharge +1/4These are an exact copy of the surface discharge plug with a 1/4 inch longer insulator (3rd in photo)$14 USD3 Available Now
1/4-32 Surface Discharge +3/8These are an exact copy of the surface discharge plug with a 3/8 inch longer insulator (4th in photo)$15 USD4 Available Now
1/4-32 Conventional
1/4-32 ConventionalThey are just over 1-3/16 inches tall with a 5/16 Hex (Same as sidefire). The gap is aprox. .023 and is slightly adjustable. They also have a new insulator and cap design that makes them compatable with the 1/4 inch insulating boot.$12 USD3 Available Now
1/4-32 Conventional +1/8These are an exact copy of the conventional plug with a 1/8 inch longer insulator. (2nd in photo)$13 USD3 Available Now
1/4-32 Conventional +1/4These are an exact copy of the conventional plug with a 1/4 inch longer insulator. (3rd in photo)$14 USD3 Available Now
1/4-32 Conventional +3/8These are an exact copy of the conventional plug with a 3/8 inch longer insulator. (4th in photo)$15 USD3 Available Now
1/4 Inch Misc
1/4-32 TapExcellent Quality. Made in the USA. $10 USD39 Available Now
1/4 BootBoot for 1/4-32 Spark plugs. These were designed to work with my new style Sidefire, Surface discharge, and conventional 1/4-32 plugs. These do not work with the Rimfire, Original Sidefire, Or chinese 1/4-32 plugs.$5 USD16 Available Now
#10
#10-40#10 plug with a conventional ground electrode. They are 1 inch tall with a 1/4 inch hex.$15 USD13 Available Now
#10-40 TapGreenfield USA Made Old stock from closed machine shop. Never used.$10 USD50 Available Now
#10 BootBoot for #10 Spark plugs$5 USD21 Available Now
#8
#8-40#8 plug with a conventional ground electrode. They are 15/16 tall with a 7/32 Hex.$15 USD35 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 USD20 Available Now
#8 BootBoot for both #8 spark plugs$5 USD36 Available Now
#6
#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 USDMore coming soon
#6 BootBoot for #6 spark plugs$5 USD9 Available Now
#6-56 TapMade by OSG in Japan. High speed steel with a ground thread. GH2 CPMT15 Spiral point Plug$20 USD5 Available Now
Little Demon
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.

Shipping

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.