ISO 4016 Hexagon Head Bolts, Production Class C

ISO 4016 hexagon head bolts with nut, production class C M5 to M64 — the wide-tolerance rough hex bolt with the collected attribute ladder (preferred + non-preferred sizes) and the full ls/lg grip tables to l 500.

Last updated: 2026-11

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ISO 4016 Hexagon Head Bolts, Production Class C in an industrial setting — Illustrative image redrawn from real product references — not a photograph of stocked items.

Specifications

Production class C is the tolerance regime, not a strength grade: ISO 4016 bolts are the rough hex bolts with generous allowances (the e/s tolerances are wider than the class A/B ISO 4014 counterparts this catalog carries), used where the nut fit only has to work — site fabrication, agricultural implements, formwork, temporary structures. The collected page is the deepest in this batch: the preferred-size attribute ladder M5 – M64 (P, b engagement bands with the source's glyph-substituted comparison signs carried verbatim, c, da, ds, dw, e min 8,63 → 104,86, k, kw, r, s with the source's mixed 8,00/36 decimal forms flagged) plus the non-preferred band M14 – M60 (k nominal prints 11.5 dot-decimal at M18 — flagged). Thread length/grip: full ls/lg tables for both size bands, l 25 – 500, transcribed as raw grids because the source interleaves the ls/lg header band over two cells per size — the pairing is not re-derived, and the flag on those tables tells you to confirm the thread/grip split per RFQ. "Bolts with nut" per the title: the shank is unthreaded through the grip, so the bearing and shear case is the bolt's home ground. Property class (class C commonly runs 4.6/5.6), material and finish are not tabulated — per RFQ.

Standard	ISO 4016 — hexagon head bolts with nut, production class C (wide-tolerance hex bolt)
Size range	M5 – M64 preferred; M14 – M60 non-preferred band; grip tables l 25 – 500
Hex geometry	s nominal=max. 8,00 → 95,0 (Min. 7,64 → 92,8); e min. 8,63 → 104,86
Head / shank	k nominal 3,5 → 40; ds max. 5,48 → 65,2; r min. 0,2 → 2
Grip tables	ls/lg ladders for both size bands, carried as raw grids — the interleaved ls/lg header band is flagged, not reinterpreted
Flagged verbatim	b-band comparison signs print as '?' (capture glyph loss); s row mixes 8,00 / 36 / 55,0 forms; M18 k prints 11.5 dot-decimal
Material / class / finish	Class C = tolerance regime; property class (commonly 4.6/5.6), material and finish not tabulated — per RFQ

ISO 4016 hexagon head bolts, production class C - attribute rows M5 - M64 (preferred sizes)All dimensions in millimetres. The source prints the b (thread engagement) bands with glyph-substituted comparison signs ('l?125mm', '125mm< l ? 200mm' - the ? stands for the <=/>= symbol lost in capture) - carried verbatim. Attribute labels: P, c = washer-face, da = abutment, ds = shank, dw = bearing, e = across corners, k = head height, kw = wrench height, r = fillet, s = width across flats. '-' in the first b band = size not offered in that length band.
Thread d		M5	M6	M8	M10	M12	M16	M20	M24	M30	M36	M42	M48	M56	M64
P		0,8	1	1,25	1,5	1,75	2	2,5	3	3,5	4	4,5	5	5,5	6
b	l?125mm	16	18	22	26	30	38	46	54	66	-	-	-	-	-
	125mm< l ? 200mm	22	24	28	32	36	44	52	60	72	84	96	108	-	-
	l > 200mm	35	37	41	45	49	57	65	73	85	97	109	121	137	153
c	max.	0,5	0,5	0,6	0,6	0,6	0,8	0,8	0,8	0,8	0,8	1	1	1	1
da	max.	6	7,2	10,2	12,2	14,7	18,7	24,4	28,4	35,4	42,4	48,6	56,6	67	75
ds	max.	5,48	6,48	8,58	10,58	12,7	16,7	20,84	24,84	30,84	37	43	49	57,2	65,2
	min.	4,52	5,52	7,42	9,42	11,3	15,3	19,16	23,16	29,16	35	41	47	54,8	62,8
dw	min.	6,74	8,74	11,47	14,47	16,47	22	27,7	33,25	42,75	51,11	59,95	69,45	78,66	88,16
e	min.	8,63	10,89	14,2	17,59	19,85	26,17	32,95	39,55	50,85	60,79	71,3	82,6	93,56	104,86
k	nominal	3,5	4	5,3	6,4	7,5	10	12,5	15	18,7	22,5	26	30	35	40
	max.	3,875	4,375	5,675	6,85	7,95	10,75	13,4	15,9	19,75	23,55	27,05	31,05	36,25	41,25
	min.	3,125	3,625	4,925	5,95	7,05	9,25	11,6	14,1	17,65	21,45	24,95	28,95	33,75	38,75
kw	min.	2,19	2,54	3,45	4,17	4,94	6,48	8,12	9,87	12,36	15,02	17,47	20,27	23,63	27,13
r	min.	0,2	0,25	0,4	0,4	0,6	0,6	0,8	0,8	1	1	1,2	1,6	2	2
s	nominal=max.	8,00	10,00	13,00	16,00	18,00	24,00	30,00	36	46	55,0	65,0	75,0	85,0	95,0
	min.	7,64	9,64	12,57	15,57	17,57	23,16	29,16	35	45	53,8	63,1	73,1	82,8	92,8

Row 16 (s): the s nominal=max. row mixes decimal forms verbatim: 8,00 / 10,00 / 13,00 against 36 / 46 and 55,0 / 65,0 further along the ladder - the source's own inconsistent formatting, not normalized

ISO 4016 hexagon head bolts, production class C - ls/lg grip ladder M5 - M64 (preferred sizes)All dimensions in millimetres. The source stacks three header rows ('Thread d' sizes; an l/ls/lg band; Nominal/min./max. limits) and prints 31 columns; the grid is reproduced verbatim without reinterpreting the interleaved ls/lg header band. l limits: Nominal / min. / max.; per-size cells follow the source's pairing, blank where absent.
Thread d			M5		M6		M8		M10		M12		M16		M20		M24		M30		M36		M42		M48		M56		M64
l			ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg
Nominal	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.
25	23,95	26,05	5	9
30	28,95	31,05	10	14	7	12
35	33,75	36,25	15	19	12	17
40	38,75	41,25	20	24	17	22	11,75	18
45	43,75	46,25	25	29	22	27	16,75	23	11,5	19
50	48,75	51,25	30	34	27	32	21,75	28	16,5	24
55	53,5	56,5			32	37	26,75	33	21,5	29	16,25	25
60	58,5	61,5			37	42	31,75	38	26,5	34	21,25	30
65	63,5	66,5					36,75	43	31,5	39	26,25	35	17	27
70	68,5	71,5					41,75	48	36,5	44	31,25	40	22	32
80	78,5	81,5					51,75	58	46,5	54	41,25	50	32	42	21,5	34
90	88,25	91,75							56,5	64	51,25	60	42	52	31,5	44
100	98,25	101,75							66,5	74	61,25	70	52	62	41,5	54	31	46
110	108,25	111,75									71,25	80	62	72	51,5	64	41	56
120	118,25	121,75									81,25	90	72	82	61,5	74	51	66	36,5	54
130	128	132											76	86	65,5	78	55	70	40,5	58
140	138	142											86	96	75,5	88	65	80	50,5	68	36	56
150	148	152											96	106	85,5	98	75	90	60,5	78	46	66
160	156	164											106	116	95,5	108	85	100	70,5	88	56	76
180	176	184													115,5	128	105	120	90,5	108	76	96	61,5	84
200	195,4	204,6													135,5	148	125	140	110,5	128	96	116	81,5	104	67	92
220	215,4	224,6															132	147	117,5	135	103	123	88,5	111	74	99
240	235,4	244,6															152	167	137,5	155	123	143	108,5	131	94	119	75,5	103
260	254,8	265,2																	157,5	175	143	163	128,5	151	114	139	95,5	123	77	107
280	274,8	285,2																	177,5	195	163	183	148,5	171	134	159	115,5	143	97	127
300	294,8	305,2																	197,5	215	183	203	168,5	191	154	179	135,5	163	117	147
320	314,3	325,7																			203	223	188,5	211	174	199	155,5	183	137	167
340	334,3	345,7																			223	243	208,5	231	194	219	175,5	203	157	187
360	354,3	365,7																			243	263	228,5	251	214	239	195,5	223	177	207
380	374,3	385,7																					248,5	271	234	259	215,5	243	197	227
400	394,3	405,7																					268,5	291	254	279	235,5	263	217	247
420	413,7	426,3																					288,5	311	274	299	255,5	283	237	267
440	433,7	446,3																							294	319	275,5	303	257	287
460	453,7	466,3																							314	339	295,5	323	277	307
480	473,7	486,3																							334	359	315,5	343	297	327
500	493,7	506,3																									335,5	363	317	347

Row 3 (25): the ls/lg header band is interleaved (two header rows over two cells per size) and the capture cannot re-derive which cell belongs to ls vs lg per size - the grid is carried verbatim without reinterpretation; confirm the thread/grip split per RFQ

ISO 4016 hexagon head bolts, production class C - attribute rows M14 - M60 (non-preferred sizes)All dimensions in millimetres; reading notes as the preferred-size table. The source mixes decimal marks in this band: k nominal prints 11.5 (dot) at M18, k min. 23.95 (dot) at M39 - verbatim.
Thread d (non-preferred dimensions)		M14	M18	M22	M27	M33	M39	M45	M52	M60
P		2	2,5	2,5	3	3,5	4	4,5	5	5,5
b	l?125mm	34	42	50	60		-	-	-
	125mm< l ? 200mm	40	48	56	66	78	90	102	116
	l > 200mm	53	61	69	79	91	103	115	129	145
c	max.	0,6	0,8	0,8	0,8	0,8	1	1	1	1
da	max.	16,7	21,2	26,4	32,4	38,4	45,4	52,6	62,6	71
ds	max.	14,7	18,7	22,84	27,84	34	40	46	53,2	61,2
	min.	13,3	17,3	21,16	26,16	32	38	44	50,8	58,8
dw	min.	19,15	24,85	31,35	38	46,55	55,86	64,7	74,2	83,41
e	min.	22,78	29,56	37,29	45,2	55,37	66,44	76,95	88,25	99,21
k	nominal	8,8	11.5	14	17	21	25	28	33	38
	max.	9,25	12,4	14,9	17,9	22,05	26,05	29,05	34,25	39,25
	min.	8,35	10,6	13,1	16,1	19,95	23.95	26,95	31,75	36,75
kw	min.	5,85	7,42	9,17	11,27	13,97	16,77	18,87	22,23	25,73
r	min.	0,6	0,6	0,8	1	1	1	1,2	1,6	2
s	nominal=max.	21,00	27,00	34	41	50	60,0	70,0	80,0	90,0
	min.	20,16	26,16	33	40	49	58,8	68,1	78,1	87,8

Row 11 (k): dot decimals appear inside the comma-decimal ladder: k nominal M18 prints 11.5 and k min. M39 prints 23.95 - carried verbatim

ISO 4016 hexagon head bolts, production class C - ls/lg grip ladder M14 - M60 (non-preferred sizes)All dimensions in millimetres; reading notes as the preferred-size ls/lg table - the interleaved header band is reproduced verbatim without reinterpretation.
Thread d (non-preferred dimensions)			M14		M18		M22		M27		M33		M39		M45		M52		M60
l			ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg
nominal	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.
60	58,5	61,5	16	26
65	63,5	66,5	21	31
70	68,5	71,5	26	36
80	78,5	81,5	36	46	25,5	38
90	88,25	91,75	46	56	35,5	48	27,5	40
100	98,25	101,75	56	66	45,5	58	37,5	50
110	108,25	111,75	66	76	55,5	68	47,5	60	35	50
120	118,25	121,75	76	86	65,5	78	57,5	70	45	60
130	128	132	80	90	69,5	82	61,5	74	49	64	34,5	52
140	138	142	90	100	79,5	92	71,5	84	59	74	44,5	62
150	148	152			89,5	102	81,5	94	69	84	54,5	72	40	60
160	156	164			99,5	112	91,5	104	79	94	64,5	82	50	70
180	176	184			119,5	132	111,5	124	99	114	84,5	102	70	90	55,5	78
200	195,4	204,6					131,5	144	119	134	104,5	122	90	110	75,5	98	59	84
220	215,4	224,6					138,5	151	126	141	111,5	129	97	117	82,5	105	66	91
240	235,4	244,6							146	161	131,5	149	117	137	102,5	125	86	111	67,5	95
260	254,8	265,2							166	181	151,5	167	137	157	122,5	145	106	131	87,5	115
280	274,8	285,2									171,5	189	157	177	142,5	165	126	151	107,5	135
300	294,8	305,2									191,5	209	177	197	162,5	185	146	171	127,5	155
320	314,3	325,7									211,5	229	197	217	182,5	205	166	191	147,5	175
340	334,3	345,7											217	237	202,5	225	186	211	167,5	195
360	354,3	365,7											237	257	222,5	245	206	231	187,5	215
380	374,3	385,7											257	277	242,5	265	226	251	207,5	235
400	394,3	405,7											277	297	262,5	285	246	271	227,5	255
420	413,7	426,3													282,5	305	266	291	247,5	275
440	433,7	446,3													302,5	325	286	311	267,5	295
460	453,7	466,3															306	331	287,5	315
480	473,7	486,3															326	351	307,5	335
500	493,7	506,3															346	371	327,5	355

Materials

Property class and finish specified per RFQ — class C hex bolts commonly run 4.6/5.6 mild steel, often hot-dip galvanized for site work; state the load case (shear through the shank vs clamped) and corrosion environment at quotation, and note the wide class C tolerances when pairing with drilled templates

Ordering & documentation

Documents

Shipments are backed by Mill Test Certificate (MTC), Dimensional Report, Salt Spray Test Report on request, with full batch traceability from raw material to finished product. Quality management follows the owner-confirmed compliance list: ISO 9001:2015, RoHS, REACH. Exact document sets are confirmed on the order.

Quotation

The fastener family (ISO 4016 Hexagon Head Bolts, Production Class C) plus the standard designation from your drawing — DIN / ISO / JIS / ASTM / ANSI, or a drawing for custom parts.
Size (diameter and length), thread type (metric or inch), property class or grade, and coating or finish.
Quantity per size and your target delivery date.
Destination country, and any required documents (for example a mill test certificate) so the quote includes them.

Sample & supply

Minimum order quantity is 1,000–10,000 pieces depending on size. Stock items run 3–7 days. High-strength and custom parts run 15–25 days. Quantities or variants outside the standard range are confirmed at quotation.

Storage & shipping

Parts are packed for export and shipped factory-direct to buyers in Europe, Asia, the Americas and the Middle East. Store fasteners dry and protected until installation, and keep coated parts in their packaging until use; specific packing and preservation requirements can be stated on the order and confirmed at quotation.

Frequently asked questions

Class C (ISO 4016) or class A/B (ISO 4014) hex bolt — when does the rough tolerance actually matter?

When the hole position is uncertain, the rough bolt is the friendlier one. Class C widens the tolerances on the hex and shank (compare the collected e min. ladder with the ISO 4014 page's), so it drops through slotted or badly aligned site holes that a close-tolerance bolt fights, and it costs less — which is why formwork, fencing, farm implements and temporary works spec it. What it gives up: fit precision (a reamed, close-tolerance joint needs class A/B or a fitted bolt) and the tight shank concentricity a machined assembly wants. Two reading notes from the capture, carried verbatim: the b engagement bands print their comparison signs as "?" (glyph loss — read as the standard up-to/from bands), and the ls/lg grip tables keep the source's interleaved header band without re-deriving which cell is thread vs grip — if your order depends on the exact grip length, confirm it per RFQ rather than reading the grid. Class C is a tolerance class, not a strength grade: the common 4.6/5.6 classes and any galvanizing are per RFQ.

Related knowledge

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Get factory-direct pricing from the manufacturer.

What to include in your inquiry

✓ Standard and property class (e.g. DIN 912, ISO 4762, class 8.8) — or a drawing for custom parts.
✓ Sizes, lengths and thread type (metric or inch).
✓ Quantity per size and your target delivery date.
✓ Destination country, plus any coating or finish requirement.
✓ Any documents you need with the shipment (e.g. mill test certificate) so the quote includes them.
✓ Your inquiry goes straight to the factory team by email and gets a reply within 24 hours.

✓ Factory-direct pricing
✓ Standard and custom specifications
✓ Factory-direct export to buyers in Europe, Asia, the Americas and the Middle East
✓ Full fastener family support

ISO 4016 Hexagon Head Bolts, Production Class C

Specifications

Materials

Ordering & documentation

Documents

Quotation

Sample & supply

Storage & shipping

Frequently asked questions

Class C (ISO 4016) or class A/B (ISO 4014) hex bolt — when does the rough tolerance actually matter?

Related grades & products

Related knowledge

Request a Quote

What to include in your inquiry