DIN 7999 High Strength Hexagon Fit Bolts

DIN 7999 High Tensile Strength Hexagon Fit Bolts (1983) specifies the requirements for hexagon fit bolts used in steel structures, covering thread sizes from M12 to M30. These fasteners are designed for use in steel, aluminum, or composite constructions. Unlike standard bolts, fit bolts have a precision-ground shank (tolerance class b11) intended to fit tightly into reamed holes to prevent lateral movement in structural joints.

Dimension Chart of DIN 7999 High Tensile Strength Hexagon Fit Bolts

DIN 7999 High Tensile Strength Hexagon Fit Bolts with Large width Across Flats for Structural Bolting, Structural bolting, hexagon fit bolts

Thread Diameter (d₁)		M12	M16	M20	M22	M24	M27	M30
d₂		13	17	21	23	25	28	31
b		18.5	22	26	28	29.5	32.5	35
c	min	0.4	0.4	0.4	0.4	0.4	0.4	0.4
c	max	0.6	0.6	0.8	0.8	0.8	0.8	0.8
d_a	max	15.2	19.2	24	26	28	32	35
d_w	min	19	25	32	34	39	43.5	47.5
e	min	22.78	29.56	37.29	39.55	45.2	50.85	55.37
k		8	10	13	14	15	17	19
r	min	0.8	0.8	1.2	1.2	1.2	1.5	1.5
s		21	27	34	36	41	46	50
y	max	6.5	7.5	8.5	8.5	10	10	11.5

Technical Data provided by Fastener Planet

Shank Length Chart of DIN 7999 High Tensile Strength Hexagon Fit Bolts

Nominal Length		M12	M16	M20	M22	M24	M27	M30
Nominal	Tolerance	Shank Length l_s ± 1
40	± 1.25	15
45	± 1.25	20	15.5
50	± 1.25	25	20.5	15.5
55	± 1.5	30	25.5	20.5	18.5	15.5
60	± 1.5	35	30.5	25.5	23.5	20.5	17.5
65	± 1.5	40	35.5	30.5	28.5	25.5	22.5	18.5
70	± 1.5	45	40.5	35.5	33.5	30.5	27.5	23.5
75	± 1.5	50	45.5	40.5	38.5	35.5	32.5	28.5
80	± 1.5	55	50.5	45.5	43.5	40.5	37.5	33.5
85	± 1.75	60	55.5	50.5	48.5	45.5	42.5	38.5
90	± 1.75	65	60.5	55.5	53.5	50.5	47.5	43.5
95	± 1.75	70	65.5	60.5	58.5	55.5	52.5	48.5
100	± 1.75	75	70.5	65.5	63.5	60.5	57.5	53.5
105	± 1.75	80	75.5	70.5	68.5	65.5	62.5	58.5
110	± 1.75	85	80.5	75.5	73.5	70.5	67.5	63.5
115	± 1.75	90	85.5	80.5	78.5	75.5	72.5	68.5
120	± 1.75	95	90.5	85.5	83.5	80.5	77.5	73.5
125	± 2		95.5	90.5	88.5	85.5	82.5	78.5
130	± 2		100.5	95.5	93.5	90.5	87.5	83.5
135	± 2		105.5	100.5	98.5	95.5	92.5	88.5
140	± 2		110.5	105.5	103.5	100.5	97.5	93.5
145	± 2		115.5	110.5	108.5	105.5	102.5	98.5
150	± 2		120.5	115.5	113.5	110.5	107.5	103.5
155	± 2		125.5	120.5	118.5	115.5	112.5	108.5
160	± 2		130.5	125.5	123.5	120.5	117.5	113.5
165	± 2			130.5	128.5	125.5	122.5	118.5
170	± 2			135.5	133.5	130.5	127.5	123.5
175	± 2			140.5	138.5	135.5	132.5	128.5
180	± 2			145.5	143.5	140.5	137.5	133.5
185	± 2.3				148.5	145.5	142.5	138.5
190	± 2.3				153.5	150.5	147.5	143.5
195	± 2.3				158.5	155.5	152.5	148.5
200	± 2.3				163.5	160.5	157.5	153.5

Technical Data provided by Fastener Planet

Weight Chart of DIN 7999 High Tensile Strength Hexagon Fit Bolts

Approximate mass (7,85 kg/dm3), per 1000 units in kg

Nominal Length	M12	M16	M20	M22	M24	M27	M30
40	58
45	63	116
50	68	124
55	74	132
60	78	141
65	83	150	250
70	89	159	263	325
75	95	168	277	344	423
80	100	176	290	363	442	585
85	106	185	304	382	461	609	772
90	111	194	317	402	480	633	801
95	116	203	331	421	499	657	831
100	123	212	344	440	519	681	860
105	128	221	357	456	538	705	890
110	134	230	371	472	557	729	919
115	139	239	384	488	576	753	949
120	145	247	398	505	595	777	978
125		256	411	520	614	800	1000
130		265	424	536	632	823	1030
135		273	437	552	651	847	1060
140		282	451	568	670	871	1090
145		291	464	584	689	895	1120
150		300	478	601	708	919	1150
155		308	491	617	727	943	1180
160		317	505	633	747	968	1210
165			518	650	766	990	1240
170			532	666	785	1010	1270
175			546	682	804	1030	1300
180			560	698	824	1060	1330
185				714	842	1090	1360
190				730	861	1110	1390
195				746	880	1140	1420
200				763	900	1160	1450

Technical Data provided by Fastener Planet

Dimension Chart of DIN 7999 High Tensile Strength Hexagon Fit Bolts

Shank Length Chart of DIN 7999 High Tensile Strength Hexagon Fit Bolts

Weight Chart of DIN 7999 High Tensile Strength Hexagon Fit Bolts

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