This product is regulated by the following standards:

Technical data

DIN 7984
UNI 9327

Standard DIN 7984

This standard DIN 7984 specifies properties for sizes M3 to M24 hexagon socket head cap screws with low head of product grade A as in DIN EN ISO 4759-1, made of steel and stainless steel

Dimensions in mm - source DIN 7984
Publication date: 03/2022 - Supersedes DIN 7984: 10/2021
d thread size	P	dk nom=max	k nom=max	s nom	e min	t nom	b (l<=125)	b (l>125<=200)	b (l>200)
M 3	0.5	5.5	2	2	2.3	1.5	12	-	-
M 4	0.7	7	2.8	2.5	2.87	2.3	14	-	-
M 5	0.8	8.5	3.5	3	3.44	2.7	16	-	-
M 6	1	10	4	4	4.58	3	18	-	-
M 8	1.25	13	5	5	5.72	3.8	22	28	-
M 10	1.5	16	6	7	8.01	4.5	26	32	-
M 12	1.75	18	7	8	9.15	5	30	36	-
M 14	2	21	8	10	11.43	5.3	34	40	-
M 16	2	24	9	12	13.72	5.5	38	44	57
M 18	2.5	27	10	12	13.72	6.5	42	48	61
M 20	2.5	30	11	14	16	7.5	46	52	65
M 22	2.5	33	12	14	16	8	50	56	69
M 24	3	36	13	17	19.44	8	54	60	73

Dimensions in mm - source DIN 7984
Publication date: 10/2021 - Supersedes DIN 7984: 06/2009
d thread size	P	dk nom=max	k nom=max	s nom	e min	t nom	b (l<=125)	b (l>125<=200)	b (l>200)
M 3	0.5	5.5	2	2	2.3	1.5	12	-	-
M 4	0.7	7	2.8	2.5	2.87	2.3	14	-	-
M 5	0.8	8.5	3.5	3	3.44	2.7	16	-	-
M 6	1	10	4	4	4.58	3	18	-	-
M 8	1.25	13	5	5	5.72	3.8	22	28	-
M 10	1.5	16	6	7	8.01	4.5	26	32	-
M 12	1.75	18	7	8	9.15	5	30	36	-
M 14	2	21	8	10	11.43	5.3	34	40	-
M 16	2	24	9	12	13.72	5.5	38	44	57
M 18	2.5	27	10	12	13.72	6.5	42	48	61
M 20	2.5	30	11	14	16	7.5	46	52	65
M 22	2.5	33	12	14	16	8	50	56	69
M24	3	36	13	17	19.44	8	54	60	73

DIN 7984 - ≈ mass in kg x1000 pcs, (ρ=7,85 kg/dm³) - commercial items
d thread size	M 3	M 4	M 5	M 6	M 8	M 10	M 12	M 14	M 16	M 18	M 20	M 22	M 24
nominal length l
5	0.48
6	0.52	0.96	2.02
8	0.6	1.12	2.26	3.24	6.85
10	0.69	1.28	2.5	3.59	7.45
12	0.78	1.44	2.74	3.94	8.05
14	0.86	1.6	2.98	4.29	8.65	13.4	19.8
16	0.97	1.76	3.22	4.64	9.25	14.4	21.2
18	1.1	1.95	3.46	4.99	9.85	15.4	22.6
20	1.2	2.15	3.77	5.34	10.5	16.4	24.1	36.7	48.7
25	1.46	2.64	4.54	6.45	12	19	27.7	41.6	55.4
30	1.74	3.13	5.31	7.56	14	21.6	31.3	46.5	62.1	83	110
35		3.62	6.08	8.67	16	24.7	34.9	51.4	68.8	91	120
40		4.11	6.85	9.78	18	27.8	39.3	56.3	75.5	99	130
45			7.62	10.89	20	30.9	43.7	62.3	82.2	107	140
50			8.39	12	22	34	48.1	68.3	89.6	115	150	188	223
55				13.1	24	37.1	52.5	74.3	97	125	160	201	238
60				14.2	26	40.2	56.9	80.3	104	135	172	214	253
70					30	46.4	65.8	92.4	119	155	197	244	288
80					34	52.6	74.7	105	134	175	222	274	324
90					38	58.8	83.6	117.5	149	195	247	304	359
100					42	65	92.5	130	164	215	272	334	395
110					46	71.2	101.4	142.5	179	235	287
120					50	77.4	110.4	155	194	255	302
130						83.6	119.2	167.5	209	275	317
140						89.8	128.1	180	224	295	332
150						96	137	192.5	239	315	347
160						102.2	146	204	253	325	362

Dimensions in mm - source DIN 7984
Publication date: 06/2009 - Supersedes DIN 7984: 12/2002 edition
d thread size	P	dk nom=max	k nom=max	s nom	e min	t nom	b (l<=125)	b (l>125<=200)	b (l>200)
M 3	0.5	5.5	2	2	2.3	1.5	12	-	-
M 4	0.7	7	2.8	2.5	2.87	2.3	14	-	-
M 5	0.8	8.5	3.5	3	3.44	2.7	16	-	-
M 6	1	10	4	4	4.58	3	18	-	-
M 8	1.25	13	5	5	5.72	3.8	22	28	-
M 10	1.5	16	6	7	8.01	4.5	26	32	-
M 12	1.75	18	7	8	9.15	5	30	36	-
M 14	2	21	8	10	11.43	5.3	34	40	-
M 16	2	24	9	12	13.72	5.5	38	44	57
M 18	2.5	27	10	12	13.72	6.5	42	48	61
M 20	2.5	30	11	14	16	7.5	46	52	65
M 22	2.5	33	12	14	16	8	50	56	69
M24	3	36	13	17	19.44	8	54	60	73

DIN 7984 - ≈ mass in kg x1000 pcs, (ρ=7,85 kg/dm³) - commercial items
d thread size	M 3	M 4	M 5	M 6	M 8	M 10	M 12	M 14	M 16	M 18	M 20	M 22	M 24
nominal length l
5	0.48
6	0.52	0.96	2.02
8	0.6	1.12	2.26	3.24	6.85
10	0.69	1.28	2.5	3.59	7.45
12	0.78	1.44	2.74	3.94	8.05
14	0.86	1.6	2.98	4.29	8.65	13.4	19.8
16	0.97	1.76	3.22	4.64	9.25	14.4	21.2
18	1.1	1.95	3.46	4.99	9.85	15.4	22.6
20	1.2	2.15	3.77	5.34	10.5	16.4	24.1	36.7	48.7
25	1.46	2.64	4.54	6.45	12	19	27.7	41.6	55.4
30	1.74	3.13	5.31	7.56	14	21.6	31.3	46.5	62.1	83	110
35		3.62	6.08	8.67	16	24.7	34.9	51.4	68.8	91	120
40		4.11	6.85	9.78	18	27.8	39.3	56.3	75.5	99	130
45			7.62	10.89	20	30.9	43.7	62.3	82.2	107	140
50			8.39	12	22	34	48.1	68.3	89.6	115	150	188	223
55				13.1	24	37.1	52.5	74.3	97	125	160	201	238
60				14.2	26	40.2	56.9	80.3	104	135	172	214	253
70					30	46.4	65.8	92.4	119	155	197	244	288
80					34	52.6	74.7	105	134	175	222	274	324
90					38	58.8	83.6	117.5	149	195	247	304	359
100					42	65	92.5	130	164	215	272	334	395
110					46	71.2	101.4	142.5	179	235	287
120					50	77.4	110.4	155	194	255	302
130						83.6	119.2	167.5	209	275	317
140						89.8	128.1	180	224	295	332
150						96	137	192.5	239	315	347
160						102.2	146	204	253	325	362

Standard UNI 9327

Hexagon socket head cap screws with low head

The UNI 9327 standard establishes the characteristics of low cylindrical head screws with hexagon socket, with coarse thread from M1.6 to M56 and fine pitch from M8 x 1 to M56 x 4, of category A.

Dimensions in mm - source UNI 9327
Publication date: 11-1988
d thread size	P coarse thread	P fine thread	dk nom=max	k min	k max	s nom	t min	b rif
M 1.6	0.35	-	3	1.1	1.2	1.5	0.53	15
M 2	0.4	-	3.8	1.4	1.5	1.5	0.75	16
M 2.5	0.45	-	4.5	1.78	1.88	2	0.85	17
M 3	0.5	-	5.5	2.15	2.25	2.5	1.1	18
M 4	0.7	-	7	2.9	3	3	1.5	20
M 5	0.8	-	8.5	3.57	3.75	4	1.9	22
M 6	1	-	10	4.32	4.5	5	2.4	24
M 8	1.25	1	13	5.82	6	6	3.2	28
M 10	1.5	1.25	16	7.28	7.5	8	3.8	32
M 12	1.75	1.25	18	8.78	9	10	4.4	36
M 14	2	1.5	21	10.23	10.5	12	5	40
M 16	2	1.5	24	11.73	12	14	5.8	44
M 18	2.5	1.5	27	13.23	13.5	14	6.6	48
M 20	2.5	1.5	30	14.73	15	17	7.3	52
M 22	2.5	1.5	33	16.23	16.5	17	8	56
M 24	3	2	36	17.73	18	19	8.8	60
M 27	3	2	40	19.92	20.25	19	9.9	66
M 30	3.5	2	45	22.17	22.5	22	11	72
M 33	3.5	2	50	24.42	24.75	24	12.1	78
M 36	4	3	54	26.67	27	27	13.2	84
M 39	4	3	58	28.92	29.25	27	14.4	90
M 42	4.5	3	63	31.11	31.5	32	15.5	96
M 48	5	3	72	35.61	36	36	17.8	106
M 52	5	3	78	38.54	39	36	19	116
M 56	5.5	4	84	41.54	42	41	20	124

Hexagon socket head cap screws with low head

Dimensions in mm - source DIN 7984 - Publication date: 2009
Publication date: 06/2009 - Supersedes DIN 7984: 12/2002 edition
d thread size	P	dk nom=max	k nom=max	s nom	e min	t nom	b (l<=125)	b (l>125<=200)	b (l>200)
M 3	0.5	5.5	2	2	2.3	1.5	12	-	-
M 4	0.7	7	2.8	2.5	2.87	2.3	14	-	-
M 5	0.8	8.5	3.5	3	3.44	2.7	16	-	-
M 6	1	10	4	4	4.58	3	18	-	-
M 8	1.25	13	5	5	5.72	3.8	22	28	-
M 10	1.5	16	6	7	8.01	4.5	26	32	-
M 12	1.75	18	7	8	9.15	5	30	36	-
M 14	2	21	8	10	11.43	5.3	34	40	-
M 16	2	24	9	12	13.72	5.5	38	44	57
M 18	2.5	27	10	12	13.72	6.5	42	48	61
M 20	2.5	30	11	14	16	7.5	46	52	65
M 22	2.5	33	12	14	16	8	50	56	69
M24	3	36	13	17	19.44	8	54	60	73

DIN 7984 - ≈ mass in kg x1000 pcs, (ρ=7,85 kg/dm³) - commercial items
d thread size	M 3	M 4	M 5	M 6	M 8	M 10	M 12	M 14	M 16	M 18	M 20	M 22	M 24
nominal length l
5	0.48
6	0.52	0.96	2.02
8	0.6	1.12	2.26	3.24	6.85
10	0.69	1.28	2.5	3.59	7.45
12	0.78	1.44	2.74	3.94	8.05
14	0.86	1.6	2.98	4.29	8.65	13.4	19.8
16	0.97	1.76	3.22	4.64	9.25	14.4	21.2
18	1.1	1.95	3.46	4.99	9.85	15.4	22.6
20	1.2	2.15	3.77	5.34	10.5	16.4	24.1	36.7	48.7
25	1.46	2.64	4.54	6.45	12	19	27.7	41.6	55.4
30	1.74	3.13	5.31	7.56	14	21.6	31.3	46.5	62.1	83	110
35		3.62	6.08	8.67	16	24.7	34.9	51.4	68.8	91	120
40		4.11	6.85	9.78	18	27.8	39.3	56.3	75.5	99	130
45			7.62	10.89	20	30.9	43.7	62.3	82.2	107	140
50			8.39	12	22	34	48.1	68.3	89.6	115	150	188	223
55				13.1	24	37.1	52.5	74.3	97	125	160	201	238
60				14.2	26	40.2	56.9	80.3	104	135	172	214	253
70					30	46.4	65.8	92.4	119	155	197	244	288
80					34	52.6	74.7	105	134	175	222	274	324
90					38	58.8	83.6	117.5	149	195	247	304	359
100					42	65	92.5	130	164	215	272	334	395
110					46	71.2	101.4	142.5	179	235	287
120					50	77.4	110.4	155	194	255	302
130						83.6	119.2	167.5	209	275	317
140						89.8	128.1	180	224	295	332
150						96	137	192.5	239	315	347
160						102.2	146	204	253	325	362

Full list of Suppliers of Hexagon socket head cap screws with low head

Screws suitable for use in parts too thin for standard sockets and for applications with limited clearences

Italy

DELTA OFFICINA MECCANICA SRL

Manufacturer specialized in socket head cap screws and six lobe recess screws in carbon stee. Threaded rods

Italy

Kilton S.R.L.

Company specialized in the production of fasteners and fixings for industrial applications in the following fields: automotive, home appliances, mechanical, components, building industry.

Leader in the manufacturing of special fasteners.

Thread rolling screws with hexagon washer head

Thread forming screws with round head and hexagon socket

Viti trilobate testa cilindrica impronta croce philips

Italy

La Bulloneria Pesaro Srl

Company leader in the commerce of nuts, bolts.

Range of more than 100.000 products such as screws, bolts, technical articles, industrial wheels, Tie rods for ropes and tools.

Italy

VIPA is a leading wholesaler of screws, nuts and bolts. The extensive stock of high-quality screws and bolts and the highly automated warehouse make VIPA the ideal supplier of screws, nuts and bolts with metric threads, drawing parts, special screws, washers, nuts and various fastening systems.

France

Avantage Industrie

Distributor and stockist of standard and special fasteners

Bulgaria

Kraft - Bulgaria Ltd.

Kraft Bulgaria EOOD is a leading BG company specialized in the trade of fasteners, industrial supplies, industrial armature for water, industrial, fire-frightening systems and irrigation sectors.

Our success is due to the high quality of the offered products, the professionalism and qualification of our team, as well as our flexible distribution network.

Italy

PRESSVIT S.R.L.

PRESSVIT has been on the market since 1967 and specialises in the production of special screws according to drawings. Within the company there is a dedicated machine shop area where modifications to existing equipment are made in order to allow customised machining of products according to customer requirements.

Cold forged special parts are therefore produced not only on time, but also with the utmost flexibility, as each production step is completed completely independently and according to the customer''s instructions.

France

Satinox Assemblage

Satinox Assemblage is a distributor and a manufacturer expert in fasteners. We offer a global supply solution of fasteners: sourcing, controls with our in house-lab, sub-contracting of special processes, storage, kitting and packaging, logistics and delivery.

Netherlands

Stafa

Specialists in hot dip galvanized fasteners

Stafa is a leading European importer of fasteners and fixings with a huge range of more than 75,000 products.

Private label packaging, assembled sets and kits, direct manufacturer to customer for large volumes, retail store concepts, special parts and complete project deliveries.

Netherlands

Triofast BV

Distributor of standard and special fasteners.

The company supplies fasteners with various types of thread: UNC, UNF, BSW and BSF. The products meet standards such as ISO, DIN, ASTM, ANSI and BS.

Austria

Weyland Steiner Handwerks & Industriebedarf GMBH

The company Weyland-Steiner is a flexible supplier of norm, standard, drawing and special parts, as well as C-parts management!

Our strength is the rapid procurement of special parts in all materials and surfaces.

Full-service trader of tools, fittings and hardware.

Germany

Achilles Seibert GmbH

Fasteners import-export distributor, specialized in hexagon socket screws and hexagon head screws

Italy

Ambrovit S.p.A.

Distributor of hex lag screws, chipboard screws, carpentry screws, drywall screws, concrete screws, PVC windows screws, dome and euro screws, metric screws, nuts/washers/bolts/threaded rods, self-tapping screws, self-drilling screws, stainless steel screws.

China

ANHUI GOODLINK FASTENER CO. LTD.

Manufacturer of socket cap screws in steel class 12.9

Italy

ANNIBALE VITERIE SPA

Manufacturer of special cold forged screws, socket screws and screws with flange.

Size: 3 -16 mm, lengths up to 100 mm . Resistance classes from 4.8 to 12.9.

Poland

Argip sp. z o.o.

Fastener distributor, 30.000 pallet places: standard parts, elements for profiles, socket screws, prevailing torque nuts, hex bolts and nuts, rigging equipment, rivets, disc springs, washers, threaded rods.

The company has its own production line of silver & black zinc flake, nylon thread-lockers and adhesive pre-applications.

Thailand

Bangkok Fastening Co. Ltd.

Manufacturer of hex head screws, carriage bolts and socket cap screws

Afghanistan

BAYKAN CIVATA

Manufacturer of standard and special screws

Germany

Böllhoff GmbH

Worldwide manufacturer of special fasteners and automatic assembly machines, wholesaler and supplier of fasteners in steel, stainless steel, brass and plastic.

The assortment includes more than 100,000 items: DIN and standard items, threaded inserts, Normteile, Gewindeeinsätze, fast fixings, adhesives and custom-special parts both in steel and plastic.

Italy

BULLONERIA BELLICINI srl

Manufacturer of hot forged fasteners and nip bolts, from M20 to M64

Clyde Fasteners Limited

Manufacturer of socket screws and Tee Slot Bolts both metric and imperial

China

Eagle Metalware Co. Ltd

Manufacturer of hex socket head cap screws, DIN 912, DIN 913, DIN 914, DIN 915, DIN 916, DIN 7991, DIN 7984, ISO 7380, anchors and auto parts, all made by cold forging.

No MOQ with 15-50 days lead time

Germany

Emil Niggeloh GmbH

Manufacturer of standard screws as per DIN and special screws as per customers request. Seizes from M 8 up to M 90

Germany

Friedrich Battenfeld

We have been a reliable supplier of standard and special fasteners for over 35 years.

We are able to produce parts on customer request.

Our strengths are the production of non-standard parts and our wide product range. We manufacture in sizes from M3 to M16.

Send us your requests.

Czech Republic

Killich s.r.o.

Import/export of standard fasteners and special parts on drawing
Delivery just in time of screws, washers, nuts, anchoring systems, riveting techniques
Individual and fast service through sales representants
Fast reaction to customer demand
Quality, price, reliability, service and individual approach

Germany

Lück Schrauben GmbH Schraubenfabrik

Manufacturer of hex head and square head fasteners

Spain

Madimport

Distributor of stainless steel fasteners

India

MARUTI INTERNATIONAL

Manufacturer of screws, nuts, washers and threaded rods

Italy

Marvit Srl

Fastener distribution: Total completeness with large stock of standard products, medium/high strength items, stainless steel, brass, hot forged and turned parts. More than 50.000 items are supplied with several surface treatments.

Italy

METALVIT Srl

Manufacturer of socket and six lobes cap fasteners.

India

Micron Precision Screws Ltd

Manufacturer of socket head screws, shoulder screws and dowel pins ranging from 4mm to 40mm diameter and lengths up to 400 mm in various grades (4.6, 5.6, 8.8, 10.9, 12.9, and 14.9).

Estonia

NB Quality Group LTD

Products in different product groups: Cleaning, Lubrication, Surface Treatment, Glues, Tapes, Electrical and Additives.

Afghanistan

NORM CIVATA SANAYI ve TICARET A.S. (NORM GROUP)

Manufacturer of standard and special fasteners for automotive

Afghanistan

OBEL CIVATA SAN. ve TiC.

Manufacturer of metric and inch size fasteners

Germany

PRK TECHNOLOGIES GmbH

Distributor of dowel pins, knurled nuts and screws

Rcf Bolt and Nut Co Tipton Limited

Leading specialist in the manufacture and distributor of industrial fasteners, manufacturing up to M64 diameter in Mild steel & High tensile and up to M39 diameter in A2-304 & A4-316 stainless steel.

Spain

Reyza

Manufacturer of high strength resistance screws

Italy

Rosval S.r.l

Manufacturer of socket head screws, machine screws and thread rolling screws.

China

SHANGHAI PRIME MACHINERY CO.LTD

One of the largest fasteners manufacturer and exporter in China.

Hexagon and socket screws, high strength hex bolts (ASTM GR5 and GR8, DIN and ISO CL.8.8 and 10.9)

The surface plating includes Black, Zinc Bright, Zinc Yellow, Hot Dip Galvanize, Dacromet, Geomet and others.

Suppliers of Hexagon socket head cap screws with low head

Technical data

Standard DIN 7984

Standard UNI 9327

Details