DIN 7968 Hexagon Fit Bolts with Hexagon Nut for Steel Structures

DIN 7968 Hexagon Fit Bolts with Hexagon Nut for Steel Structures (2007) 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 7968 Hexagon Fit Bolts with Hexagon Nut for Steel Structures

DIN 7968 Hexagon Fit Bolts with Hexagon Nut for Steel Structures, hexagon fit bolts,

Notes

1: Hexagon nut according to DIN EN ISO 4032 or DIN EN ISO 4034.
a: Cone point CH according to DIN EN ISO 4753.
b: Incomplete thread u ≤ 2 P.
c: Reference line for d_w.

Thread Diameter (d)		M12	M16	M20	M24	M27	M30
P (Pitch)		1.75	2	2.5	3	3	3.5
b	Auxiliary Dimension	20.5	24.5	28.5	33	35.5	38.5
c	max	0.6	0.8	0.8	0.8	0.8	0.8
d_a	max	14.7	18.7	24.4	28.4	32.4	35.4
d_a	Nominal Size	13	17	21	25	28	31
d_s	min	12.74	16.74	20.71	24.71	27.71	30.67
d_s	max	12.85	16.85	20.84	24.84	27.84	30.83
d_w	min	16.4	22	27.7	33.2	38	42.7
e	min	19.85	26.17	32.95	39.55	45.2	50.85
k	Nominal Size	8	10	13	15	17	19
	min	7.55	9.25	12.1	14.1	16.1	17.95
	max	8.45	10.75	13.9	15.9	17.9	20.05
k_w	min	5.28	6.47	8.47	9.87	11.27	12.56
r	min	0.6	0.6	0.8	0.8	1	1
s	max=Nominal Size	18	24	30	36	41	46
s	min	17.57	23.16	29.16	35	40	45
y	max	6.5	7.5	8.5	10	10	11.5

Technical Data provided by Fastener Planet

Shaft Lengths Chart of DIN 7968 Hexagon Fit Bolts

Length			M12		M16		M20		M24		M27		M30
Nominal	min	max	l_s min	l_g max	l_s min	l_g max	l_s min	l_g max	l_s min	l_g max	l_s min	l_g max	l_s min	l_g max
35	33.75	36.25	8	14.5
40	38.75	41.25	13	19.5	8	15.5
45	43.75	46.25	18	24.5	13	20.5	8	16.5
50	48.75	51.25	23	29.5	18	25.5	13	21.5
55	53.5	56.5	28	34.5	23	30.5	18	26.5	12	22
60	58.5	61.5	33	39.5	28	35.5	23	31.5	17	27	14.5	24.5
65	63.5	66.5	38	44.5	33	40.5	28	36.5	22	32	19.5	29.5	15	26.5
70	68.5	71.5	43	49.5	38	45.5	33	41.5	27	37	24.5	34.5	20	31.5
75	73.5	76.5	48	54.5	43	50.5	38	46.5	32	42	29.5	39.5	25	36.5
80	78.5	81.5	53	59.5	48	55.5	43	51.5	37	47	34.5	44.5	30	41.5
85	83.25	86.75	58	64.5	53	60.5	48	56.5	42	52	39.5	49.5	35	46.5
90	88.25	91.75	63	69.5	58	65.5	53	61.5	47	57	44.5	54.5	40	51.5
95	93.25	96.75	68	74.5	63	70.5	58	66.5	52	62	49.5	59.5	45	56.5
100	98.25	101.75	73	79.5	68	75.5	63	71.5	57	67	54.5	64.5	50	61.5
105	103.25	106.75	78	84.5	73	80.5	68	76.5	62	72	59.5	69.5	55	66.5
110	108.25	111.75	83	89.5	78	85.5	73	81.5	67	77	64.5	74.5	60	71.5
115	113.25	116.75	88	94.5	83	90.5	78	86.5	72	82	69.5	79.5	65	76.5
120	118.25	121.75	93	99.5	88	95.5	83	91.5	77	87	74.5	84.5	70	81.5
125	123	127			93	100.5	88	96.5	82	92	79.5	89.5	75	86.5
130	128	132			98	105.5	93	101.5	87	97	84.5	94.5	80	91.5
135	133	137			103	110.5	98	106.5	92	102	89.5	99.5	85	96.5
140	138	142			108	115.5	103	111.5	97	107	94.5	104.5	90	101.5
145	143	147			113	120.5	108	116.5	102	112	99.5	109.5	95	106.5
150	148	152			118	125.5	113	121.5	107	117	104.5	114.5	100	111.5
155	153	157					118	126.5	112	122	109.5	119.5	105	116.5
160	158	162					123	131.5	117	127	114.5	124.5	110	121.5
165	163	167					128	136.5	122	132	119.5	129.5	115	126.5
170	168	172					133	141,5	127	137	124.5	134.5	120	131.5
175	173	177					138	146,5	132	142	129.5	139.5	125	136.5
180	178	182					143	151,5	137	147	134.5	144.5	130	141.5
185	182.7	187.3							142	152	139.5	149.5	135	146.5
190	187.7	192.3							147	157	144.5	154.5	140	151.5
195	192.7	197.3							152	162	149.5	159.5	145	156.5
200	197.7	202.3							157	167	154.5	164.5	150	161.5

Technical Data provided by Fastener Planet

Weight Chart of DIN 7968 Hexagon Fit Bolts with Hexagon Nut

Mass (7,85 kg/dm³) for 1000 units of bolts and nuts, in kg, approximately.

Length	M12	M16	M20	M24	M27	M30
35	63.6
40	68.6	137
45	74	146	255
50	79.2	155	269
55	84.4	164	283	437
60	89.6	173	297	456	621
65	94.8	182	311	475	645	848
70	100	191	325	494	669	878
75	105	200	339	513	693	908
80	110	209	353	532	717	938
85	115	218	367	551	741	968
90	120	227	381	570	765	998
95	125	236	395	589	789	1028
100	130	245	409	608	813	1058
105	135	254	423	627	837	1088
110	140	263	437	646	861	1118
115	145	272	451	665	885	1148
120	150	281	465	684	909	1178
125		290	479	703	933	1208
130		299	493	722	957	1238
135		308	507	741	981	1268
140		317	521	760	1005	1298
145		326	535	779	1029	1328
150		335	549	798	1053	1358
155			563	817	1077	1388
160			577	836	1101	1418
165			591	855	1125	1448
170			605	874	1149	1478
175			619	893	1173	1508
180			633	912	1197	1538
185				931	1221	1568
190				950	1245	1598
195				969	1269	1628
200				988	1293	1658
Nut Weight (kg/1000 pcs)	15.3	36.5	69.3	119	170	234

Technical Data provided by Fastener Planet

Dimension Chart of DIN 7968 Hexagon Fit Bolts with Hexagon Nut for Steel Structures

Notes

Shaft Lengths Chart of DIN 7968 Hexagon Fit Bolts

Weight Chart of DIN 7968 Hexagon Fit Bolts with Hexagon Nut

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