DIN EN 14399 - 4

Dimensional standard of Bolts as per DIN EN 14399-4

• For hot-dip galvanized nuts, the dimensions apply before galvanizing.
• P is the pitch of thread.
• dw, max. = actual

EN 14399-4 Standard

Size.	Pitch (p)	Width across corner (e)	Width across Flat (s)		Thickness of head (k)		Thread Length (b)		da	dw	Shank diameter (ds)		Radius under head ( r )	Washer height (c)		Major Diameter (D)		Pitch Diameter (D1)		Minor Diameter (D2)
	MM	Min	Min	Max	Min	Max	Min	Max	Max	Min	Min	Max	Min			MM	Min	Min	Max	Min
M16	2.0	29.56	26.16	27	9.25	10.75	28	30.00	19.20	24.90	15.30	16.70	1.2	0.4	0.6	15.68	15.96	14.50	14.60	13.80
M20	2.5	35.03	31.00	32	12.10	13.90	33	35.50	24.00	29.50	19.16	20.84	1.5	0.4	0.8	19.62	19.96	18.15	18.25	17.25
M22	2.5	39.55	35.00	36	13.10	14.90	34	36.50	26.00	33.30	21.16	22.84	1.5	0.4	0.8	21.62	21.96	20.15	20.25	19.25
M24	3.0	45.20	40.00	41	14.10	15.90	39	43.00	28.00	38.00	23.16	24.84	1.5	0.4	0.8	23.58	23.95	21.80	21.90	20.70
M27	3.0	50.85	45.00	46	16.10	17.90	41	45.00	32.00	42.80	26.16	27.84	2.0	0.4	0.8	26.58	26.95	24.80	24.90	23.70
M30	3.5	55.37	49.00	50	17.95	20.05	44	49.50	35.00	46.60	29.16	30.84	2.0	0.4	0.8	29.52	29.95	27.50	27.60	26.16
M36	4.0	66.44	58.80	60	21.95	24.05	52	59.00	41.00	55.90	35.00	37.00	2.0	9	M-36	4.0	66.44	58.80	60	21.95
M39	4.0	71.30	63.10	65	23.95	26.05	68	75.00	45.00	60.00	38.00	40.00	2.5	0.5	1.0	38.46	38.94	36.20	36.30	34.61
M42	4.5	76.95	68.10	70	24.95	27.05	74	82.50	48.00	64.70	41.00	43.00	2.5	0.5	1.0	41.44	41.94	38.80	38.90	37.07
M45	4.5	82.60	73.10	75	26.95	29.05	76	84.50	52.00	69.45	44.00	46.00	3.0	0.5	1.0	44.44	44.94	41.80	41.90	40.07
M48	5.0	88.25	78.10	80	28.95	31.05	82	92.00	55.00	74.20	47.00	49.00	3.0	0.5	1.0	47.40	47.93	44.50	44.60	42.52
M56	5.5	99.20	87.80	90	33.75	36.25	90	101.50	64.20	83.40	54.80	57.20	3.5	0.5	1.0	55.36	55.92	52.10	52.20	49.97
M64	6.0	110.50	97.80	100	38.75	41.25	100	113.00	73.20	92.90	62.80	65.20	4.0	0.5	1.0	63.32	63.92	59.80	59.90	57.42