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Thrust Screw Dimensions (DIN 6332, M6 to M20)

Guide · Updated October 28, 2026

DIN 6332 covers thrust screws with a thrust point, used in jigs and fixtures, in ISO metric coarse thread M6 to M20. Thrust point d2, shank d3, pin length l2 and point length l3 below agree across the Ferrobend (din-fasteners.com) DIN 6332 table, the DigiPich DIN 6332 data sheet and the Elesa+Ganter DIN 6332 catalog. Fillet radius r is from Ferrobend and DigiPich, which agree; Elesa+Ganter does not list it. Skipped: hex socket size (one catalog family only) and the per-length weights. Check the current edition or your supplier for critical work.

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Step by step

Pick the thread: Choose the clamp thread, M6 to M20 coarse, to suit the clamp force and the tapped hole in your fixture.
Read the point: Find the row for thrust point diameter d2 (h11), shank d3 and point length l3.
Check the pin: Pin length l2 is the reduced end that carries a DIN 6311 thrust pad or bears directly on the part.
Choose the length: Pick total length l so the screw reaches the part with thread still engaged in the fixture.
Add a pad if needed: Snap a DIN 6311 thrust pad onto the point for uneven or finished surfaces so the screw does not mark or twist the part.
Fit a handle: Fit a knob, lever or tommy bar on the outer end, or turn it with the hex socket.

DIN 6332 thrust screw dimensions (mm)

Columns: thread d1, pitch P, thrust point d2 (h11), shank d3 (0/-0.1), pin length l2, point length l3, fillet radius r.

Thread d1 | P | d2 | d3 | l2 | l3 | r
M6 | 1 | 4.5 | 4 | 6 | 2.5 | 3
M8 | 1.25 | 6 | 5.4 | 7.5 | 3 | 5
M10 | 1.5 | 8 | 7.2 | 9 | 4.5 | 6
M12 | 1.75 | 8 | 7.2 | 10 | 4.5 | 6
M16 | 2 | 12 | 11 | 12 | 5 | 9
M20 | 2.5 | 15.5 | 14.4 | 14 | 5.5 | 13

Worked example: M12 fixture clamp

An M12 DIN 6332 screw has an 8 mm h11 thrust point with a 10 mm pin and a 7.2 mm shank. Catalog lengths run about 50 to 100 mm; pick one that reaches the part with at least 1 to 1.5 x d of thread still in the fixture, and put an M12 DIN 6311 pad on the point if the face is finished.

Direct point vs thrust pad

Direct point: simple, but it turns on the part and can mark it.
DIN 6311 pad: swivels to sit flat on uneven faces and does not twist the part.

Common problems

Point marks the part: add a thrust pad.
Pad falls off: check the snap ring and the h11 point size.
Screw too short: thread runs out before the part is clamped; go up a length.

FAQ

What is a DIN 6332 thrust screw?

A threaded clamping screw with a reduced, rounded thrust point on one end. It pushes on a workpiece in a fixture, either directly or through a swivel thrust pad.

Why is the point smaller than the thread?

The point diameter d2 is under the thread minor diameter, so the screw can be fed through the tapped hole point-first.

Which thrust pad fits?

DIN 6311 thrust pads snap onto the point with a ring or spring. Match the pad to the screw thread size.

What does h11 on d2 mean?

d2 is held to ISO tolerance h11 (zero to minus), so pads fit the same way on every screw of that size.

What material and finish?

Typically steel class 5.8, black oxide, with the point hardened (SK) or not (SKN); zinc plated and stainless versions exist.

Why no socket size in the table?

Only one catalog family listed the socket size, so we left it out of the chart. Measure the screw you buy.

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General shop information only — follow your drawing, tool maker's data and your quality system.