DIN 261 dimensions — T-head bolts

Name: DIN 261 dimensions
Creator: TaurusFix

Edition: dimensions from the 2010-12 edition · current edition DIN 261:2024-12

DIN 261 dimensions

mm · 16 sizes, M8 – M100In stock

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Size	PThread pitch	kHead height		mHead width		bThread length			dsBody diameter		nHead thickness		dbInternal thread	tInternal thread length	daUnderhead diameter	rRadius
Size		min	max	min	max	l ≤ 120	120 < l ≤ 200	l > 200	min	max	min	max			max	min approx.
M8	1.25	5.1	5.9	17.1	18.9	22	–	–	7.42	8.58	7.25	8.75	–	–	10.2	0.4
M10	1.5	6.5	7.5	20	22	26	–	–	9.42	10.58	9.25	10.75	–	–	12.2	0.4
M12	1.75	7.25	8.75	25	27	30	–	–	11.3	12.7	11.1	12.9	–	–	14.7	0.6
M16	2	9.6	11.4	29	31	38	44	57	15.3	16.7	15.1	16.9	–	–	18.7	0.6
M20	2.5	12.1	13.9	35.75	37.25	46	52	65	19.16	20.84	19	21	–	–	24.4	0.8
M24	3	14.1	15.9	41.75	44.25	54	60	73	23.16	24.84	23	25	–	–	28.4	0.8
M30	3.5	18	20	52.5	55.5	66	72	85	29.16	30.84	29	31	–	–	35.4	1
M36	4	22	24	64.5	67.5	78	84	97	35	37	34.75	37.25	M12	22	42.4	1
M42	4.5	25	27	78.5	81.5	90	96	109	33	34	40.75	43.25	M12	22	48.6	1.2
M48	5	29	31	86.25	89.75	–	108	121	37	38	46.75	49.25	M12	22	56.6	1.6
M56	5.5	33.75	36.25	100.25	103.75	–	124	137	44	45	54.5	57.5	M16	26	67	2
M64	6	38.75	41.25	113.25	116.75	–	130	143	49	50	62.5	65.5	M16	26	75	2
M72	6	43.75	46.25	126	130	–	–	169	53.8	55	70.5	73.5	M16	26	83	2
M80	6	48.75	51.25	138	142	–	–	185	63.8	65	78.5	81.5	M20	33	92	2
M90	6	53.5	56.5	153	157	–	–	205	68.8	70	88.25	91.75	M20	33	102	2.5
M100	6	60.5	63.5	168	172	–	–	225	78.8	80	98.25	101.75	M20	33	113	2.5

Dimensions from DIN 261:2010-12. The current edition is DIN 261:2024-12.

ISO 898-1steel, property class 8.8ISO 3506-1stainless steel, A2-70, A4-80