M17 Bolt Size and Thread Specifications

Q: What is the standard pitch for an M17 bolt?

The common coarse pitch for M17 is 1.5 mm. Confirm fine or special pitches on the drawing when replacing fasteners.

Q: What imperial fastener is closest to M17?

5/8-11 (approx.) is a practical imperial reference for M17; always verify against your application.

What is an M17 bolt?

An M17 bolt has 17 mm nominal diameter. Pitch and thread form must be taken from the application; it is not a high-availability stock size.

M17 is uncommon compared with M16 or M18. Replacement usually requires matching the exact thread pitch and strength class from the equipment manual. Spanish reference: perno M17.

Specifications

Specification	Value
Nominal diameter	17 mm
Standard pitch (coarse)	1.5 mm
Tap drill size	15.5 mm
Closest imperial equivalent	5/8-11 (approx.)

Hex head size

Bolt size	Hex head size
M17	27 mm

Common uses

Specialized equipment and spares that call out M17 explicitly.

Related tools

Metric to Imperial Screw Converter — compare M17 to common inch threads.
Tap Drill Calculator — tap drill size for M17 and other metric threads.
Thread Identifier Tool — match measured diameter and pitch to a standard.

Related charts

Universal Screw & Bolt Size Chart — metric, imperial, pitch, and tap drill in one view.
Tap Drill Chart — metric tap drill sizes.

FAQ

What is the standard pitch for an M17 bolt?

The common coarse pitch for M17 is 1.5 mm. See drawings for fine or special pitches.

What drill size should be used for tapping M17 threads?

For M17 x 1.5 coarse thread, use approximately a 15.5 mm tap drill. Use our Tap Drill Calculator for other pitches.

What imperial fastener is closest to M17?

5/8-11 (approx.) is a practical reference for comparing M17 to inch hardware; verify fit for your application.

Related guide

Metric vs Imperial Fasteners