DIN 931 - ISO 4014

We are specialist supplying for High tensile bolts and nuts in 8.8, 10.9, 12.9 grade for power, energy, renewable sector like wind power and solar energy, and also in stainless steel bolts and nuts in SS 304, SS 316, SS 316L and 316S31 grade for the marine.

Our main products:

Heavy Hex Bolt (ASTM A325/A325M type1 and type3, ASTM A490/A490M type1 and type3, EN14399-3, EN14399-4, JIS B1186(F10T), GB1228, AS1252, IS3757)

Tension Control Bolt(ASTM F1852, F2280, EN14399-10, S10T, GB3632)
Welding Stud (ISO13918, AWSD1.1 / 1.5)
Hex Bolt(DIN933 / DIN931, ISO4014 / 4017, EN15048, SAE A307, AS1110, JIS B1180 grade 4.8,8.8,10.9)
Foundation Anchor Bolt ("L","J","U","I" type with 4.8, 8.8 and 10.9 grade)
Thread Rod including Stud Bolt (DIN975 / 976, A193 B7)

High tensile fasteners

DIN 931 - ISO 4014

[ AREAS-705 ]

DIN 931/ISO 4014

Hexagon Bolts are created to DIN 931, and are a partially threaded fastener with a hexagon-shaped head that is usually fixed with a spanner or socket tool.

DIN 931 - Bolt Dimension

Dimensional Standard of Bolts per DIN 931

• For hot-dip galvanized nuts, the dimensions apply before galvanizing.
• P is the pitch of thread.
• dw, max. = actual
• β = 15⁰ to 30⁰
• Incomplete thread u = 2P

Nominal	Pitch of thread P	Width across corners e	Width across flats s		Thickness of head k		Thread Length b			Transition Diameter da	Dia. of washer face dw	Diameter of unthreaded shank ds		Radius under head r	Depth of washer face c		Major Diameter (D)		Pitch Diameter (D1)		Minor Diameter (D2)
Nominal	Pitch of thread P	Width across corners e	Width across flats s		Thickness of head k		Thread Length b			Transition Diameter da	Dia. of washer face dw	Diameter of unthreaded shank ds		Radius under head r	Depth of washer face c		Major Diameter (D)		Pitch Diameter (D1)		Minor Diameter (D2)	MM	Min.	Min.	Max.	Min.	Max.	Bolt ≤125	Bolt 125-200	Bolt ≥200	Max.	Min.	Min.	Max.	Min.	Min.	Max.	Min.	Min.	Min.	Max.	Max.
M-16	2.0	26.17	23.16	24	9.71	10.29	38	44	57	17.70	22.00	15.57	16	0.6	0.2	0.8	15.68	15.96	14.50	14.60	13.80
M-18	2.5	29.56	26.16	27	11.15	11.85	42	48	61	20.20	24.85	17.57	18	0.6	0.2	0.8	17.62	17.96	16.15	16.25	15.25
M-20	2.5	32.95	29.16	30	12.15	12.85	46	52	65	22.40	27.70	19.48	20	0.8	0.2	0.8	19.62	19.96	18.15	18.25	17.25
M-22	2.5	37.29	33.00	34	13.65	14.35	50	56	69	24.40	31.35	21.48	22	0.8	0.2	0.8	21.62	21.96	20.15	20.25	19.25
M-24	3.0	39.55	35.00	36	14.65	15.35	54	60	73	26.40	33.25	23.48	24	0.8	0.2	0.8	23.58	23.95	21.80	21.90	20.70
M-27	3.0	45.20	40.00	41	16.65	17.35	60	66	79	30.40	38.00	26.48	27	1.0	0.2	0.8	26.58	26.95	24.80	24.90	23.70
M-30	3.5	50.85	45.00	46	18.18	19.12	66	72	85	33.40	42.75	29.48	30	1.0	0.2	0.8	29.52	29.95	27.50	27.60	26.16
M-33	3.5	55.37	49.00	50	20.58	21.42	72	78	91	36.40	46.55	32.38	33	1.0	0.2	0.8	32.52	32.95	30.50	30.60	29.16
M-36	4.0	60.79	53.80	55	22.08	22.92	78	84	97	39.40	51.11	35.38	36	1.0	0.2	0.8	35.46	35.94	33.15	33.25	31.61
M-39	4.0	66.44	58.80	60	24.58	25.42	84	90	103	42.40	55.86	38.38	39	1.0	0.3	1.0	38.46	38.94	36.20	36.30	34.61
M-42	4.5	71.30	63.10	65	25.58	26.42	90	96	109	45.60	59.95	41.38	42	1.2	0.3	1.0	41.44	41.94	38.80	38.90	37.07
M-45	4.5	76.95	68.10	70	27.58	28.42	96	102	115	48.60	64.70	44.38	45	1.2	0.3	1.0	44.44	44.94	41.80	41.90	40.07
M-48	5.0	82.60	73.10	75	29.58	30.42	102	108	121	52.60	69.45	47.38	48	1.6	0.3	1.0	47.40	47.93	44.50	44.60	42.52
M-52	5.0	88.25	78.10	80	32.50	33.50	110	116	129	56.60	74.20	51.26	52	1.6	0.3	1.0	51.40	51.93	48.50	48.60	46.52
M-56	5.5	93.56	82.80	85	34.50	35.50	118	124	137	63.00	78.66	55.26	56	2.0	0.3	1.0	55.36	55.92	52.10	52.20	49.97
M-60	5.5	99.21	87.80	90	37.50	38.50	-	132	145	67.00	83.41	59.26	60	2.0	0.3	1.0	59.36	59.92	57.85	57.95	53.97
M-64	6.0	104.86	92.80	95	39.50	40.50	-	140	153	71.00	88.16	63.26	64	2.0	0.3	1.0	63.32	63.92	59.80	59.90	57.42