Dimensions for UNI 6596 Square Washers for wood constructions

Nominal size	For thread size	d1		a		h			Approx weight kg/1000pcs
		Nominal min.	max.	Nominal max.	min.	Nominal	max.	min.
11	M10	11	11	30	28	3	3.6	2.4	20
13.5	M12	13.5	13.93	40	38	4	4.6	3.4	45.7
17.5	M16	17.5	18.2	50	48.4	5	6	4	88.7
22	M20	22	22.84	60	58.1	5	6	4	126
24	M22	24	24	70	68.1	6	7	5	209
26	m24	26	26.84	80	78.1	6	7	5	275
30	M27	30	30.84	90	87.8	6	5	348
3	M30	3	34	95	92.8	6	7	5	385
36	M33	36	37	100	97.8	6	7	5	423
39	M36	39	40	110	107.8	8	9.2	6.8	685
42	M39	42	43	125	122.5	8	9.2	6.8	895
45	M42	45	46	135	132.5	8	9.2	6.8	1050
48	M45	48	49	140	137.5	8	9.2	6.8	1120
52	M48	52	53.2	150	147.5	10	11.2	8.8	1600
56	M52	56	27.2	160	157.5	10	11.2	8.8	1820