GOST 22355-77 WASHERS OF PRODUCT GRADE C FOR HIGH-STRENGTH BOLTS

GOST 22355-77 establishes the design and dimensions of washers of product grade C for high-strength bolts.

The design and dimensions of the washers shall comply with those shown in the drawing and table.

mm

Nominal bolt thread diameter	d₁	d₂	s
16	18	37
(18)	20	39	4
20	22	44
(22)	24	50	5; 6*
24	26	56
(27)	30	66
30	33	66	6
36	39	78
42	45	90	8
48	52	100

The thickness of washers used in bridge construction is noted separately. Dimensions given in brackets are not recommended for use.

Example of a designation for a washer for a bolt with a thread diameter of 20 mm:

Washer 20 GOST 22355-77

Technical requirements — per GOST 22356-77.

Limit deviations of dimensions and tolerances of form and location of surfaces — per GOST 18123-82.

Surface roughness and permissible surface defects of washers — per GOST 18123-82.

The theoretical weight of washers is given in the reference appendix.

Theoretical weight of washers

Nominal thread diameter of the bolt, mm	Theoretical mass of 1000 washers, kg	Nominal thread diameter of the bolt, mm	Theoretical mass of 1000 washers, kg
16	25.8	(27)	127.8
(18)	27.6	30	120.7
20	35.8	36	168.7
(22)	59.3	42	299.5
24	75.8	48	359.7

Corresponds to GOST R 52646-2006.