20x28 Shim Washer (Shim Ring), DIN 988

Made for 20x28 screws, this shim washer (DIN 988) has a 20 mm hole and is 28 mm across. Download it as 8 lengths from 0.1 to 2 mm, each as simplified STEP.

How these parts are made, and what the levels mean: read the method

• Also searched as: 20x28 shim ring, 20x28 x 0.1 to 20x28 x 2 shim rings
• Model id: din988-20x28
• Standard: DIN 988:1990-03 · size 20x28

Lengths

Length (mm)	Part key	Simplified
0.1	din988-20x28x0-1	STEP
0.15	din988-20x28x0-15	STEP
0.2	din988-20x28x0-2	STEP
0.3	din988-20x28x0-3	STEP
0.5	din988-20x28x0-5	STEP
1	din988-20x28x1	STEP
1.5	din988-20x28x1-5	STEP
2	din988-20x28x2	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d1	Inside diameter		20		20	nominal	L1
d2	Outside diameter		28		28	nominal	L1

Drawing

As a PDF: CC-DIN988-SZ-20x28.pdf.

The 20x28 shim washer beside the 19x26

The 20x28 is the last of the 18 DIN 988 shim washers published here, listed from 3x6 to 20x28.

• Inside diameter (d1): 20 mm on the 20x28 shim washer, against 19 mm on the 19x26.
• Outside diameter (d2): 28 mm on the 20x28 shim washer, against 26 mm on the 19x26.

Other sizes

• One size smaller: 19x26 Shim Washer (Shim Ring), DIN 988, 19 mm hole, 26 mm OD.

Documents

• CC-DIN988-DS-20x28.pdf: 20x28 datasheet: values with levels, lengths, sources
• CC-DIN988-SZ-20x28.pdf: 20x28 drawing: this size's values on the views
• parts.json: the part record of every length (the platform contract)

Sources

fasten-it-din988, fasteners-eu-din988, schrauben-lexikon-din988. Full citations: the method page and this size's datasheet.

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