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Thrust Pad Dimensions (DIN 6311, 12 to 40 mm)

Guide · Updated October 28, 2026

DIN 6311 covers swivel thrust pads for DIN 6332 thrust screws, pad diameter 12 to 40 mm for M6 to M20. Pad diameter d1, bore d2, neck d3 and height h1 agree across the Elesa+Ganter DIN 6311 catalog, the JW Winco DIN 6311 table, the KIPP K0392 table and the fasten.it DIN 6311 data sheet. Height h2 agrees in Elesa+Ganter, JW Winco and fasten.it; KIPP lists 7 mm instead of 6 mm for the 25 mm pad, so we used the majority 6 mm. Recess depth t is from KIPP and fasten.it, which agree. Skipped: the approximate dimension e (values differ between catalogs) and the low Form T pads (one catalog only). DIN 6311 is withdrawn; check your supplier for critical work.

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Step by step

Start from the screw: Find the DIN 6332 thrust screw thread, M6 to M20, already in your fixture.
Read the pad row: Find the row for that thread: pad face diameter d1, bore d2, neck d3 and heights h1, h2.
Check the bore: Bore d2 takes the screw thrust point; it is sized just over the DIN 6332 point d2 so the pad can swivel.
Check clearance: Overall height h1 adds to the screw reach, so allow for it when picking the screw length.
Snap it on: Tilt the screw point into the bore over the snap ring opening and press; do not press it flat on a bench.
Clamp: Tighten the screw; the pad seats flat on the part and does not turn with the screw.

DIN 6311 thrust pad dimensions (mm)

Columns: pad diameter d1, bore d2 (H12), neck d3, overall height h1, height h2, recess depth t, DIN 6332 screw.

d1 | d2 | d3 | h1 | h2 | t | Screw
12 | 4.6 | 10 | 7 | 2.5 | 4 | M6
16 | 6.1 | 12 | 9 | 4 | 5 | M8
20 | 8.1 | 15 | 11 | 5 | 6 | M10
25 | 8.1 | 18 | 13 | 6 | 7 | M12
32 | 12.1 | 22 | 15 | 7 | 7.5 | M16
40 | 15.6 | 28 | 16 | 9 | 8 | M20

Worked example: M12 fixture clamp

An M12 DIN 6332 thrust screw takes the 25 mm DIN 6311 pad: 8.1 mm bore over the 8 mm screw point, 18 mm neck, 13 mm tall. Add the 13 mm pad height to the screw reach when you choose the screw length.

Pad vs bare point

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

Common problems

Pad falls off: check the snap ring and that the screw point is the matching size.
Pad will not snap on: tilt the point into the ring opening first.
Pad marks soft parts: use a larger pad or a soft-faced pad.

FAQ

What is a DIN 6311 thrust pad?

A hardened swivel pad that snaps onto the point of a DIN 6332 thrust screw. It spreads the clamp force and stops the screw twisting or marking the part.

Which screw fits each pad?

12 mm pad: M6, 16: M8, 20: M10, 25: M12, 32: M16, 40: M20. Some catalogs say the 20 and 25 mm pads take M10 or M12, since both share the 8.1 mm bore.

How is the pad held on?

A round-wire snap ring inside the pad clicks into the groove on the screw point. Form S is the standard version with a snap ring.

Does it fit uneven surfaces?

Yes. The pad pivots on the point, so it can sit on faces that are slightly out of square with the screw.

Why no tilt angle e in the table?

Catalogs list e as approximate and the values differ (for example 4.5 vs 4.6 mm on the 25 mm pad), so we left it out.

Is DIN 6311 still current?

DIN 6311 has been withdrawn but is still the common catalog reference. Check your supplier for critical work.

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