Flat Washers National Size

This standard provides for the nominal specifications (thread diameter) for work .6-64m m, standard series, hardness class of 200H V and 300 HV class,

National standard for flat washers with a product grade A

Hard, 200H V-class washers for

- hexhead bolts and screws with a rating of 8.8 and a product grade A and B;

- hexagon nuts with a grade of 8 and a product grade of A and B;

- No hexagonal bolts, screws and hexagonal nuts of rusted steel and similar chemical compositions;

- Self-squeezing screws hardened on the surface

Hard 300H V-class washers for:

Hex head bolts and screws with a grade 10.9 and a product grade of eight and B:

-- Hex nuts with a grade of 10 and a product grade of A and B;

If you need dimensions other than those specified in this standard, you should choose from GB.

When using large bolt holes in clamping soft material parts or r parts, the user shall verify the suitability of such washers.

National standard level washer specification table DIN125 units (mm)

SpecS Maximum outer diameter nominal thickness

M1.6 4.0 0.3

M2 5.0 0.3

M3 7.0 0.5

M4 9.0 0.8

M5 10.0 1.0

M6 12.0 1.6

M8 16.0 1.6

M10 20.0 2.0

M12 24.0 2.5

M14 28.0 2.5

M16 30.0 3.0

M18 34.0 3.0

M20 37.0 3.0

M22 39.0 3.0

M24 44.0 4.0

M27 50.0 4.0

M30 56.0 4.0

M33 60.0 5.0

M36 66.0 5.0

M42 78.0 7.0

"gb/t 97.3-2000 pin shaft with flat washer" This standard provides for the nominal specifications of 3 to 100mm, performance grade of 160hv, product grade a class, for gb/t 880 with perforated pins and gb/t 822 pin shaft flat washers.

Small series (or standard series), nominal size d-8mm, performance class 140HV, non-surface-treated small washers (or flat washers, or chamfered flat washers) mark: washer GB848-85-8-140HV (or GB97.1-85-8-140HV)

Place the page plate in place and slot according to the position of the page plate, the depth of the slot is consistent with the thickness of the page plate. This step can be omitted if the spring hinges are selected without punching.

Step four, secure the board

The grooves are also open, and the next thing to do is to place the page plate in the groove and secure it with welding or screws. During the fixation process, avoid tilting the board.