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This product is regulated by the following standards:

DIN 940

Technical data

Standard DIN 940

This standard (DIN 940) defines dimensions, technical delivery conditions and the designation of studs with a thread length at the metal end of approximately 2,5 d (lenght of engagement) product grade A for coarse thread from M4 to M24 and fine pitch thread from M8 x 1 to M24x2. Studs complying with this standard are intended for use mainly in light metals of low strength.

Dimensions in mm - source DIN 940

Publication date: 07/2010 Supersedes DIN 940: 02/1995

d thread size

M 4 M 5 M6 M 7 M 8   M8X1 M 10    M10X1.25 M 12     M12X1.5 M 14 M14X1.5 M 16 M16X1.5 M 18 M18X1.5 M 20 M20X1.5 M 22 M22X1.5 M 24 M24X2
b1 nom 10 13 15 18 20 25 30 35 40 45 50 55 60
b2  (l<=125) 14 16 18 20 22 26 30 34 38 42 46 50 54
b2 (l>125<=200) 20 22 24 26 28 32 36 40 44 48 52 56 60
b2 (l>200) - - - - - 45 49 53 57 61 65 69 73
ds min/max 3.82-4 4.82-5 5.82-6 6.78-7 7.78-8 9.78-10 11.73-12 13.73-14 15.73-16 17.73-18 19.67-20 21.67-22 23.67-24
x1 1.75 2.0 2.5 2.5 3.2 3.8 4.3 5.0 5.0 6.3 6.3 6.3 7.5

DIN 940 -Approximate mass, in kg x1000 pcs, (ρ=7,85 kg/dm3) - commercial lengths

Publication date: 07/2010

d thread size
M4
M5
M6
M7
M8
M10
M12
M14
M16
M18
M20
M22
M24
nominal length l                          
12                          
14                          
16                          
18                          
20 2.14                        
22 2.61 4.46                      
25 2.90 4.92 7.26                    
28 3.20 5.38 7.93 11.8                  
30 3.40 5.69 8.37 12.4 16.3                
35 3.89 6.46 9.48 13.9 18.3 30.7              
40 4.38 7.23 10.6 15.4 20.2 33.8 51.9            
45   8.00 11.7 16.9 22.2 36.9 56.3 80.9          
50   8.77 12.8 18.4 24.2 39.9 60.8 86.9 122        
55     13.9 20 26.2 43.0 65.2 93 130 167      
60     15 21.5 28.1 46.1 69.7 99 138 177 232    
65       23 30.1 49.2 74.2 105 146 187 344 311  
70       24.5 32.1 52.3 78.5 111 154 197 257 326 394
75         34.1 55.4 83 117 161 207 269 341 412
80         36 58.4 87.4 123 169 217 281 356 430
85           61.5 91.9 129 177 227 294 371 447
90           64.6 96.3 135 185 237 306 386 465
95           67.7 101 141 193 247 318 401 483
100           70.8 105 147 201 257 331 415 501
110             114 159 217 277 355 445 536
120             123 172 232 297 380 475 572
130               184 248 317 405 505 607
140               196 264 337 429 535 643
150                 280 357 454 565 678
160                 296 377 479 594 714
170                   397 503 624 749
180                   417 528 654 785
190                     553 684 820
200                     577 714 856

Full list of Suppliers of Studs, metal end ≈2,5d

Italy

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Founded in 1969, Buora D.P.U. is a distributor certified following ISO 9001.

The company offers the complete range of high strength fasteners, ready on stock, both coarse and fine pitches with metric and inch threads.

Distributor of prestigious brands such as UNBRAKO and NORD-LOCK, for Buora D.P.U. the service always comes first, therefore there is not minimum quantity required.

South Korea

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UNI EN ISO 9001:2015 certified company.

UK

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Afghanistan

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Spain

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Germany

TÜV-certified manufacturer in compliance with AD-Merkblatt WO/TRD100, DIN EN ISO 9002. Quality assurance Certificate following the norm 97/23/EG. We stand for highest quality, customer satisfaction and short-term delivery.  Stud screws (DIN 938, DIN 939, DIN 835, DIN 940), threaded elements, threaded bolts (DIN 976A und B), threaded pins (DIN 976-1), headless screws (DIN 551, DIN 553, DIN 427, DIN 417), tie bars, drop-in anchors, weld pins and butt welding ends, inches and fine pitch threads (UNC, Whitworth), special parts.

Italy

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Afghanistan

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We manufacture according DIN norms and following customer-specific drawings. Small to large batch sizes, in all common grades and surfaces. Fast response times and delivery for the desired quality.

Hungary

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UK

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China

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India

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Brazil

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Hot forging of fasteners, in special steels, mainly for “Oil & Gas” sector.

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• hexagon nuts and 12-point nuts

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India

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Iran

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China

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Argentina

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Special pieces according to costumers requirements.

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Metallographic Laboratory in our facilities.

ISO 9001 Certificate.

Venezuela

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United Kingdom

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