M7 Nut Dimensions: Hex & Thin Series

M7 nut dimensions or sizes are critical for European automotive engines, bicycle seat posts, and specialized machinery. This size is specifically engineered to mate with fasteners having a 7.00 mm nominal diameter and is available in M7 x 1.0 for the coarse series and M7 x 0.75 for the fine series, where 1.0 and 0.75 represent the thread pitch in millimeters.

This charts is based on the Regular Series (DIN 934 / ISO 4032) for standard load-bearing applications. The thread dimensions comply with DIN 13-1 (coarse), DIN 13-21 (fine series), and ISO 68-1 standards to ensure a precise fit and reliable engagement across specialized metric fastening systems.

Disclaimer: Actual dimensions, including the width across flats (spanner or wrench size), nut height, and thread tolerance may vary depending on the specific manufacturing class and material — always verify with the official product datasheet before use or buying.

Nut internal thread diagram depicting major diameter, minor diameter, and pitch diameter
Nut body diagram depicting width across flats, width across corners, diameter, and thickness or height
M7 x 1.0 Hex Nut – DIN 13-1/ISO 68-1
DimensionSize (mm)
MinMax
Major Diameter 7 7.294
Pitch Diameter 6.35 6.5
Minor Diameter 5.917 6.153
Thread Pitch 1.0
M7 x 0.75 Hex Nut – DIN 13-21/ISO 68-1
DimensionSize (mm)
MinMax
Major Diameter 7 7.24
Pitch Diameter 6.513 6.645
Minor Diameter 6.188 6.378
Thread Pitch 0.75
Metric to Inch Converter
Enter mm to convert to inches
Previous & Next Size Chart
← M6
→ M8

← Choose Another Size

Frequently Asked Questions

What size wrench or spanner do I need for an M7 nut?

An M7 hex nut typically requires an 11 mm wrench or socket. The standard width across flats (s) for an M7 nut is 11.00 mm. Because 11 mm is less common in some basic toolsets, ensure you have a dedicated metric set available.