MBMB

Washer A 10,5
Washer A 8,4
Washer A 5,3
Washer A 17
Washer B 6,4
Washer 8,4


What do they mean?

Randy V

Size in millimeters? Outside diameter followed by inside diameter?

Or the , is a decimal point.

Hilton

10mm hole, with 5mm of metal around it (i.e. 20mm total diameter).

Anything thicker than a standard washer is usually a "spacer" or similar IIRC.

MBMB

Makes sense.

A? B? There's an ANSI standard: B has tighter tolerances than A. I'm not sure the same is true under DIN (German Standards Institute) standards.

DIN 125-A is (was) for flat washers without chamfer; DIN 125-B is (was) for flat washers with chamfer. So I suspect that B 6,4 is a 6mm washer, 14mm outer diameter, with a chamfer.

(The equivalent standards to withdrawn DIN 125-A and 125-B are ISO 7089 and 7090.)

But…there's also a "washer R 6,6" (105-5-37 in your hymnal, if you're singing along), a "washer M12 X 1,5" (103-00-24), and a "washer 8,5 X 19 X 6" (999 025 075 02), which I guess has an 8.5mm hole, a 19mm OD, and a thickness of 6mm.

There's even a "washer A17" on the front of the alternator.

MB
PET Geek.

Leon Speed

DIN 125

Washers
Inside diameter mm - Outside diameter mm - Thickness mm
3,2 7,0 0,5
4,3 9,0 0,8
5,3 10,0 1,0
6,4 12,0 1,6
8,4 16,0 1,6
10,5 20,0 2,0
13,0 24,0 2,5
15,0 28,0 2,5
17,0 30,0 3,0
19,0 34,0 3,0
21,0 37,0 3,0
23,0 39,0 3,0
25,0 44,0 4,0

MBMB

Ausgezeichnet. Vielen dank!