They have 14mm threads and a 7/16" reach, Designed to work with a 13/16" hex wrench, Plugs are non-resistor, copper core, standard tip, Has a spark plug reach of 0.437" and a thread length of 0.4375", These spark plugs are specially designed to fit all 1939-53 Flathead Fords
Autolite 216 Flathead Spark Plugs Autolite
Autolite 216 Flathead Spark Plugs
Sku # 373216
Mfr. Part # 216
Condition
New
Brand
Autolite
Sold
Each
Details

These spark plugs fit all 1939-53 Flathead Fords. Work very well with our ignitions.

  • 14mm threads
  • 7/16" reach
  • 13/16" hex
  • Flat gasket seal

Item Details

7/16" Reach, 13/16" Hex, 14mm Threads
Specs
Spark Plug Seat Style
Gasket
Seat Taper
Gasket
Spark Plug Reach
0.437"
Thread Pitch
14mm
Resistor
No
Insulator Type
Non-projected
Spark Plug Heat Range
6
Core Material
Copper
Tip Material
Nickel Alloy
MFG. Part #
216
Wrench Size
13/16"
Sold in Quantity
Each
Notes
Non-resistor, copper core, standard tip.
Reviews

I paid $25 for 1 plug - went to car quest paid $22 for 8 !

Rated
Product Rating
by D on March 29, 2022

Summary: Not a good deal 216 plugs are not rare this price is outrageous for one plug would no recommend to anyone !

No, I would not recommend this product.

Autolite THE sparkplug for flatheads

Rated
Product Rating
by Taildragger on March 24, 2022

Summary: I had champions when i bought my 35 ford but they malfunctioned a lot and now with the autolited never had any issues

Yes, I recommend this product.

GREAT PRODUCT

Rated
Product Rating
by Mercmanm on June 02, 2021

Summary: It's great because it made my engine run great again, and you can't beat that....

Yes, I recommend this product.

I would buy again.

Rated
Product Rating
by tom on February 11, 2012

Summary: Great spark plug works well in my flathead.

Yes, I recommend this product.

WE CAN NOT BUYS THESE IN AUS.MUST HAVE .

Rated
Product Rating
by R&R REG,OLD51 on August 27, 2010

Summary: TO BE ABLE TO BUY THEM,,WE NEED THESE FOR OUR MSDs IN OUR FLATHEADS,1/2 INCH REACH PLUGS ARE HARD TO FIND IN AUS.

Yes, I recommend this product.

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Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.