Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

This is an AMP page - Open full page! for all features.

ISO 2841 - Spark Plugs Metric Threads

Sponsored Links

Spark plug threads according ISO 28741  Road vehicles — Spark-plugs and  their cylinder head housings — Basic  characteristics and dimensions.

ISO 2841 - Spark Plugs Metric Threads
SizeMajor Diameter

Minor Diameter1)


Tap Drill


M10 x 1.0 10.0 9.153 - 8.917 1.00 9.20 65
M12 x 1.25 12.0 10.912 - 10.647 1.25 10.9 72
M14 x 1.25 14.0 12.912 - 12.647 1.25 12.90 72
M18 x 1.5 18.0 16.676 - 16.376 1.50 16.75 68

1) Tolerance class 6H.

Sponsored Links

Related Topics


The relationships between forces, acceleration, displacement, vectors, motion, momentum, energy of objects and more.


Thread data - metric, unified, ACME and others.

Related Documents

ANSI B1.20.1 - NPS - American National Standard Straight Pipe Threads

NPS pressure tight straight pipe threads with lubricant or sealer.

ANSI B1.20.1 - NPT - American National Standard Taper Pipe Threads

NPT and NPTF pipe threads - dimensions according ANSI/ASME B1.20.1/3.

BS 21 - Pressure Tight Pipe Thread Joints

BSPT - British Standard Pipe Taper threads & BSP or BSPF - British Standard Pipe Parallel (Straight) threads.

ISO 7 - Pipe Threads where Pressure-tight Joints are made on the Threads

Pressure-tight joints made on the pipe threads.

ISO 724 - Metric Threads

Dimensions of metric threads according ISO 724.

Piping Thread Standards

Applied threaded standards used for piping connections.

Reduced Torque with Lubricated Bolts

Lubrication effect on bolt tension and torque.

Threads commonly used in Piping

Piping thread standards.

UNC and UNF - Unified Coarce and Unified Fine Inch Threads

ANSI/ASME B1.1 Unified National Thread - UNC Coarse series and UNF Fine series.

US and Metric Fasteners - Thread Sizes

Printable fastener chart.

Sponsored Links

Search Engineering ToolBox

  • the most efficient way to navigate the Engineering ToolBox!

SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!


We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.