DIN 933 Hex Head Screws (Fully Threaded)

DIN 933 hexagon head screws with thread to the head — the fully threaded metric hex screw, M1.6 to M52 — with the full collected 27-size table: pitch, head and across-flats geometry, and the Grade A/B tolerance rows as printed.

Last updated: 2026-11

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DIN 933 Hex Head Screws (Fully Threaded) in an industrial setting — Illustrative image redrawn from real product references — not a photograph of stocked items.

Specifications

DIN 933 is the fully threaded member of the metric hex pair: thread runs to the underside of the head, so any grip length within the stock length can be engaged without shank limitation. That makes it the default shelf part for maintenance, fabrication and assembly work — and the reason it is the most consumed hex form in metric hardware. The trade against the partially threaded DIN 931 is mechanical: a threaded grip has less shear area and more stress concentration, so joints loaded in shear favor the shank form. The collected table runs M1.6 to M52, splitting geometry into Grade A tolerances for the smaller sizes and Grade B for the larger (the transition sits around M12–M24 depending on the feature), with the source's a row (the unthreaded shank allowance printed for the form) carried on its own column. Thread pitch is metric coarse throughout the series. Property class, finish and commercial lengths are not part of the collected table — they follow the drawing callout and the quotation, and the ISO class pages on this site (8.8, 10.9, 12.9) carry the mechanical data. For the partially threaded counterpart see DIN 931; ISO 4017 is the ISO-aligned equivalent designation.

Standard	DIN 933 — hexagon head screws with thread to head (fully threaded)
Series	M1.6 – M52 (27 sizes tabulated; some larger sizes printed in parentheses in the source)
Tabulated geometry	Per size: pitch P, allowance a, chamfer c, transition diameter d a, bearing face d w, across-corners e, head height k, wrench reach k 1, fillet r, across-flats s — Grade A and Grade B tolerance rows as printed
Thread form	Metric coarse, thread to the underside of the head
Family note	Fully threaded counterpart of DIN 931 (shank form); ISO-aligned equivalent ISO 4017
Materials / strength	Not tabulated by the collected specification — per RFQ (property class and finish per drawing callout)

DIN 933 hex head screws (fully threaded) - per-size dimensions (M1.6 - M52)All dimensions in millimeters. Attribute labels follow the source: P = thread pitch; a = unthreaded shank allowance on the fully threaded form; c = chamfer; d a = transition diameter; d w = bearing face diameter; e = width across corners; k = head height; k 1 = wrench-reach minimum; r = fillet radius under the head; s = width across flats. Grade A rows apply to the smaller sizes and Grade B to the larger ones; where a grade row does not cover a size the source prints "-" — reproduced verbatim. The Grade B value rows repeat the Grade A row qualifiers ("min") without printing them — reproduced as printed. Materials, property classes and length ranges are not tabulated by the collected specification.
Nominal thread	P — Pitch	a — max	c — min	c — max	d a — max	d w — Grade A — min	d w — Grade B — min	e — Grade A — min	e — Grade B — min	k — Nominal Size	k — Grade A — min	k — max	k — Grade B — min	k 1 — min	r — min	s — max=nominal size	s — Grade A — min	s — Grade B — min
M1.6	0.35	1.05	0.1	0.25	2	2.4	-	3.41	-	1.1	0.98	1.22	-	0.7	0.1	3.2	3.02	-
M2	0.4	1.2	0.1	0.25	2.6	3.2	-	4.32	-	1.4	1.28	1.52	-	0.9	0.1	4	3.82	-
M2.5	0.45	1.35	0.1	0.25	3.1	4.1	-	5.45	-	1.7	1.58	1.82	-	1.1	0.1	5	4.82	-
M3	0.5	1.5	0.15	0.4	3.6	4.6	-	6.01	-	2	1.88	2.12	-	1.3	0.1	5.5	5.32	-
(M3.5)	0.6	1.8	0.15	0.4	4.1	5.1	-	6.58	-	2.4	2.28	2.52	-	1.6	0.1	6	5.82	-
M4	0.7	2.1	0.15	0.4	4.7	5.9	5.7	7.66	7.5	2.8	2.68	2.92	2.6	1.9	0.2	7	6.78	6.64
M5	0.8	2.4	0.15	0.5	5.7	6.9	6.7	8.79	8.63	3.5	3.35	3.65	3.26	2.28	0.2	8	7.78	7.64
M6	1	3	0.15	0.5	6.8	8.9	8.7	11.05	10.89	4	3.85	4.15	3.76	2.63	0.25	10	9.78	9.64
(M7)	1	3	0.15	0.5	7.8	9.6	9.4	12.12	11.94	4.8	4.65	4.95	4.56	3.19	0.25	11	10.73	10.57
M8	1.25	3.75	0.15	0.6	9.2	11.6	11.4	14.38	14.2	5.3	5.15	5.45	5.06	3.54	0.4	13	12.73	12.57
M10	1.5	4.5	0.15	0.6	11.2	15.6	15.4	18.9	18.72	6.4	6.22	6.56	6.11	4.28	0.4	17	16.73	16.57
M12	1.75	5.25	0.15	0.6	13.7	17.4	17.2	21.1	20.88	7.5	7.32	7.68	7.21	5.05	0.6	19	18.67	18.48
(M14)	2	6	0.15	0.6	15.7	20.5	20.1	24.49	23.91	8.8	8.62	8.98	8.51	5.96	0.6	22	21.67	21.16
M16	2	6	0.2	0.8	17.7	22.5	22	26.75	26.17	10	9.82	10.18	9.71	6.8	0.6	24	23.67	23.16
(M18)	2.5	7.5	0.2	0.8	20.2	25.3	24.8	30.14	29.56	11.5	11.28	11.72	11.15	7.8	0.6	27	26.67	26.15
M20	2.5	7.5	0.2	0.8	22.4	28.2	27.7	33.53	32.95	12.5	12.28	12.72	12.15	8.5	0.8	30	29.67	29.16
(M22)	2.5	7.5	0.2	0.8	24.4	30	29.5	35.72	35.03	14	13.78	14.22	13.65	9.6	0.8	32	31.61	31
M24	3	9	0.2	0.8	26.4	33.6	33.2	39.98	39.55	15	14.78	15.22	14.65	10.3	0.8	36	35.38	35
(M27)	3	9	0.2	0.8	30.4	-	38	-	45.2	17	-	-	16.65	11.7	1	41	-	40
M30	3.5	10.5	0.2	0.8	33.4	-	42.7	-	50.85	18.7	-	-	18.28	12.8	1	46	-	45
(M33)	3.5	10.5	0.2	0.8	36.4	-	46.5	-	55.37	21	-	-	20.58	14.4	1	50	-	49
M36	4	12	0.2	0.8	39.4	-	51.1	-	60.79	22.5	-	-	22.08	15.5	1	55	-	53.8
(M39)	4	12	0.3	1	42.4	-	55.9	-	66.44	25	-	-	24.58	17.2	1	60	-	58.8
M42	4.5	13.5	0.3	1	45.6	-	59.9	-	71.3	26	-	-	25.58	17.9	1.2	65	-	63.1
(M45)	4.5	13.5	0.3	1	48.6	-	64.7	-	76.95	28	-	-	27.58	19.3	1.2	70	-	68.1
M48	5	15	0.3	1	52.6	-	69.4	-	82.6	30	-	-	29.58	20.9	1.6	75	-	73.1
(M52)	5	15	0.3	1	56.6	-	74.2	-	88.25	33	-	-	32.5	22.8	1.6	80	-	78.1

DIN 933 hex head screws (fully threaded) — approximate weight (kg/1000 pcs) by length, M3 – M48Weights in kg per 1000 pieces as printed by the source ("Weight in kgs. per 1,000 pcs. unless otherwise specified. All weights are approximations."). Blank cell = the length/size combination is not tabulated by the source. Decimal points are the source's own. Weights are approximations for shipping/planning, not a guarantee.
Length (mm)	Weight kg/1000 pcs — M3	Weight kg/1000 pcs — M4	Weight kg/1000 pcs — M5	Weight kg/1000 pcs — M6	Weight kg/1000 pcs — M7	Weight kg/1000 pcs — M8	Weight kg/1000 pcs — M10	Weight kg/1000 pcs — M12	Weight kg/1000 pcs — M14	Weight kg/1000 pcs — M16	Weight kg/1000 pcs — M18	Weight kg/1000 pcs — M20	Weight kg/1000 pcs — M22	Weight kg/1000 pcs — M24	Weight kg/1000 pcs — M30	Weight kg/1000 pcs — M36	Weight kg/1000 pcs — M48
4	0.48
5	0.53	1.26
6	0.57	1.33	2.18	3.40
7	0.61	1.41	2.28	3.57	5.60
8	0.66	1.49	2.38	3.74	5.85	8.5	15.2
10	0.75	1.64	2.63	4.08	6.35	9.1	16.2	23.3	38.0
12	0.84	1.80	2.87	4.42	6.85	9.8	17.2	25.0	40.0	52.9
14	0.92	1.95	3.12	4.76	7.35	10.5	18.2	26.4	42.0	55.6
16	1.00	2.10	3.37	5.11	7.85	11.1	19.2	27.7	44.0	58.3	82.0	105	133	173
18	1.09	2.25	3.62	5.45	8.35	11.7	20.2	29.1	46.0	60.9	84.9	110	137	178
20	1.18	2.41	3.87	5.80	8.85	12.3	21.2	31.0	48.0	63.5	87.2	114	143	184
22	1.27	2.56	4.12	6.15	9.35	12.9	22.2	33.0	50.0	66.2	92.2	119	148	190
25	1.40	2.80	4.49	6.65	10.00	13.9	23.7	34.1	53.0	70.2	95.8	124	155	199
28	1.52	3.04	4.86	7.15	10.70	14.9	25.2	36.2	55.9	74.2	100.0	129	161	200
30	1.61	3.19	5.11	7.51	11.30	15.5	26.2	37.7	57.9	76.9	104.0	134	168	214
35		3.57	5.73	8.37	12.50	17.1	28.7	41.3	62.9	83.5	112.0	145	181	229	424	670
40		3.96	6.35	9.23	13.80	18.7	31.2	44.9	67.9	90.2	120.0	155	193	244	448	714	1590
45		4.34	6.99	10.10	15.00	20.3	33.7	48.5	72.9	97.1	128.0	165	206	259	472	748	1650
50		4.73	7.59	11.00	16.30	21.8	36.2	52.0	77.9	103.0	136.0	176	219	274	496	783	1710
55		5.12	8.21	11.90	17.50	23.4	38.7	55.6	82.8	110.0	145.0	186	232	289	519	817	1770
60		5.50	8.83	12.70	18.70	25.0	41.3	58.2	87.8	117.0	153.0	196	244	304	543	851	1830
65		5.89	9.45	13.60	20.00	26.6	43.8	62.8	92.8	123.0	161.0	207	257	319	566	886	1890
70		6.28	10.10	14.40	21.20	28.2	46.3	66.4	97.9	130.0	169.0	217	269	334	590	910	1950
75			10.70	15.30	22.50	29.8	48.8	70.0	102.0	137.0	177.0	227	282	348	614	950	2010
80			11.30	16.20	23.70	31.4	51.3	73.6	107.0	144.0	186.0	238	295	363	637	990	2080
85					25.00	33.0	53.8	77.2	112.0	150.0	194.0	247	308	378	661	1020	2140
90					26.20	34.6	56.3	80.8	117.0	157.0	202.0	258	321	393	685	1060	2200
95					27.50	35.2	59.8	84.4	122.0	164.0	210.0	268	333	408	708	1100	2260
100					28.70	37.7	61.3	88.0	127.0	170.0	218.0	279	346	423	732	1140	2320
110						40.9	66.4	95.2	137.0	184.0	235.0	300	371	453	779	1200	2450
120							71.4	102.0	147.0	197.0	251.0	320	397	483	827	1260	2570
130							76.4	109.0	157.0	210.0	268.0	340	421	513	874	1330	2690
140							81.4	116.0	167.0	224.0	284.0	361	448	543	921	1400	2820
150							86.4	123.0	177.0	237.0	300.0	381	473	572	969	1470	2940
160											316.0	402	498	602	1010	1540	3060
170											332.0	422	523	632	1060	1610	3180
180											348.0	442	548	662	1110	1680	3310
190											364.0	462	573	692	1160	1740	3430
200											380.0	484	598	722	1210	1810	3560

Row 1 (4): Column alignment note (batch-level, anchored here): the 17 weight columns align one-to-one to the source header sizes (M3, M4, M5, M6, M7, M8, M10, M12, M14, M16, M18, M20, M22, M24, M30, M36, M48); verified against the rendered grid (rowspan/colspan expanded) and the monotone per-size weight progressions, not inferred from the flattened markup alone. The first grid row is a lone "Length" section label, carried as the first-column semantics.

Materials

Material, property class and finish specified per RFQ — the collected specification table covers geometry only

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 (DIN 933 Hex Head Screws (Fully Threaded)) 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

Why is DIN 933 the more common shelf form, and when does that choice backfire?

Fully threaded stock covers every grip length, so fabricators and maintenance stores hold one part where a shank bolt would need several. The form backsfire in shear-loaded connections — the thread roots in the joint plane cut the effective shear area and add notch stress — and in joints where a smooth shank is needed for location. DIN 933 is the right call when thread engagement length varies or the whole length must grip; switch to DIN 931 when the joint plane lands in the shank.

What should an RFQ for DIN 933 hex screws state?

The designation (DIN 933), diameter and length, property class or stainless grade, finish (plain, zinc, or hot-dip galvanized where the class permits), required certificates such as a mill test report per EN 10204 3.1, and quantity per size — plus destination country. Head and across-flats dimensions are in the table so wrench and socket selection can be checked at design time.

What is the MOQ and lead time for this bolt type?

The minimum order quantity is 1,000–10,000 pieces depending on size. Stock items ship in 3–7 days; high-strength and custom parts in 15–25 days. Common diameters in this designation are widely stocked; confirm the exact schedule against quantity and size mix at quotation.

Related knowledge

Request a Quote

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

DIN 933 Hex Head Screws (Fully Threaded)

Specifications

Materials

Ordering & documentation

Documents

Quotation

Sample & supply

Storage & shipping

Frequently asked questions

Why is DIN 933 the more common shelf form, and when does that choice backfire?

What should an RFQ for DIN 933 hex screws state?

What is the MOQ and lead time for this bolt type?

Related grades & products

Related knowledge

Request a Quote

What to include in your inquiry