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Machine Screw

MACHINE SCREWS COUNTERSUNK HEAD - SLOTTED  - DIN 963

 A machine screw is a screw with a slotted head or socket heads often used for fastening metal parts securely together in various types of machinery or construction. Machine screws are unique, though, because of their size. These are used in threaded holes and are likely to end up with a stronger joint.
The American Society of Mechanical Engineers (ASME) defines machine screws as featuring a diameter of up to 0.75 inches. They can be smaller than 0.75 inches in diameter, but they can’t be larger than this size. As a result, machine screws are generally smaller than most other types of screws.
Well, screws typically feature either uniform or tapered threading. Uniform threading means the exterior threading — the helical ridges on the outside of the screw — remain the same size from the top of the screw to the bottom. Machine screws are most often used for fastening metal parts securely together in various types of machinery or construction. Other uses include vehicles, engines, tool assembly, electronic devices, and large-scale industrial equipment.
Machine screws are versatile in the number of types of joints they can fasten. They can be used for fastening two or more components with through holes and a nut behind all the components. In comparison, tapered threading means the screw’s threading expand taper or expands towards the bottom. Machine screws feature uniform threading that remains the same size from the top to the bottom. Most machine screws are usually designed to hold together parts of electronics, engines, and industrial equipment. They are also used to fasten many gasketed devices that are sandwiched together such as waterproof motor casings. For this reason, they are typically much stronger compared to other types of fasteners.




d1  M2  M2.5  M3  M4  M5  M6  M8  M10  M12  M16  M20
d2  3.8 4.7 5.6 7.5 9.2 11 14.5 18 22 29 36
k 1.2 1.5 1.65 2.2 2.5 3 4 5 6 8 10
0.5 0.6 0.8 1 1.2 1.6 2 2.5 3 4 5
t min.  0.4 0.5 0.6 0.8 1 1.2 1.6 2 2.4 3.2 4


Metric Series Approx Count Per 50kg.
Dia M2 M2.5 M3 M4 M5 M6 M8 M10 M12 M16 M20
Length
3mm 495050 285714                  
4mm 420168 242718 171821                
5mm 364964 211864 149254 73964              
6mm 328947 187970 131926 66313 41322            
8mm 259067 153374 107066 55556 34483 22831          
10mm 216450 129534 90090 47170 29412 19685 9940        
12mm 186567 112108 77760 40984 25641 17301 8818 5214      
14mm 163399 98619 68399 36496 22831 15385 7937 4717      
16mm 145773 88183 60976 32680 20492 13850 7205 4310      
18mm 131234 79745 55066 29762 18587 12658 6605 3968      
20mm   72780 50201 27174 17007 11601 6090 3676 2404    
22mm   66934 46296 25126 15723 10730 5656 3425 2252    
25mm   59666 40984 22523 14085 9634 5107 3106 2049 1048  
28mm     37037 20325 12723 8741 4673 2841 1880 967  
30mm     34722 19157 12019 8224 4386 2688 1779 919 552
35mm       16722 10504 7184 3846 2370 1577 818 495
40mm       14881 9276 6378 3425 2119 1416 740 450
45mm         8306 5727 3086 1916 1282 671 410
50mm         7519 5203 2809 1748 1174 617 379
55mm             2577 1608 1082 569 350
60mm               1484 1004 530 327
70mm                 967 463 287
80mm                 776 413 256
90mm                   373 231
100mm                   338 211



CHEESE | ROUND HEAD - SLOTTED  - DIN 84


d1 M2 M2.5 M3 M4 M5 M6 M8 M10 M12
d2 3.8 4.5 5.5 7 8.5 10 13 16 18
k 1.3 1.6 2 2.6 3.3 3.9 5 6 7
n 0.5 0.6 0.8 1.2 1.2 1.6 2 2.5 2.5
t min. 0.6 0.7 0.85 1.1 1.3 1.6 2 2.4 2.4


Metric Series Approx Count Per 50kg.
Dia M2 M2.5 M3 M4 M5 M6 M8 M10 M12
Length
3mm 312500 183824 106157            
4mm 279330 165563 97087 49020          
5mm 252525 150602 89286 45872          
6mm 230415 138122 82781 42735 24272        
8mm 196850 118483 72254 37594 22727 14045      
10mm 171821 103734 64103 34014 19608 12755 6369    
12mm 151976 92251 57604 30675 17857 11710 5889 3425  
14mm 136986 83056 52301 27933 16393 10823 5476 3205  
16mm 124378 75529 48077 25641 15152 10040 5118 3012  
18mm 113636 69252 44248 23810 14124 9363 4808 2841  
20mm 104603 63939 40984 22222 13228 8787 4545 2688  
22mm     38168 20833 12438 8278 4274 2551  
25mm     34722 18939 11364 7622 3968 2370  
28mm     31847 17422 10707 7042 3676 2212  
30mm     30120 16556 9960 6711 3521 2119  
35mm     26596 14663 8897 6061 3165 1916  
40mm     23810 13158 8000 5435 2874 1748  
45mm       11990 7267 5000 2646 1608  
50mm       10941 6667 4587 2427 1488  
55mm             2262 1385  
60mm               1295  
70mm                  
80mm                  
90mm                  
100mm                  


PAN HEAD - SLOTTED  - DIN 85


d1 M2 M2.5 M3 M4 M5 M6 M8 M10 M12
d2 3.8 4.5 5.5 7 8.5 10 13 16 18
k 1.3 1.6 2 2.6 3.3 3.9 5 6 7
n 0.5 0.6 0.8 1.2 1.2 1.6 2 2.5 2.5
t min. 0.6 0.7 0.85 1.1 1.3 1.6 2 2.4 2.4


Metric Series Approx Count Per 50kg.
Dia M2 M2.5 M3 M4 M5 M6 M8 M10 M12
Length
3mm 312500 183824 106157            
4mm 279330 165563 97087 49020          
5mm 252525 150602 89286 45872          
6mm 230415 138122 82781 42735 24272        
8mm 196850 118483 72254 37594 22727 14045      
10mm 171821 103734 64103 34014 19608 12755 6369    
12mm 151976 92251 57604 30675 17857 11710 5889 3425  
14mm 136986 83056 52301 27933 16393 10823 5476 3205  
16mm 124378 75529 48077 25641 15152 10040 5118 3012  
18mm 113636 69252 44248 23810 14124 9363 4808 2841  
20mm 104603 63939 40984 22222 13228 8787 4545 2688  
22mm     38168 20833 12438 8278 4274 2551  
25mm     34722 18939 11364 7622 3968 2370  
28mm     31847 17422 10707 7042 3676 2212  
30mm     30120 16556 9960 6711 3521 2119  
35mm     26596 14663 8897 6061 3165 1916  
40mm     23810 13158 8000 5435 2874 1748  
45mm       11990 7267 5000 2646 1608  
50mm       10941 6667 4587 2427 1488  
55mm             2262 1385  
60mm               1295  
70mm                  
80mm                  
90mm                  
100mm                  


COUNTERSUNK HEAD - PHILLIPS  - DIN 965


d1 M2 M2.5 M3 M4 M5 M6 M8
d2 3.9 4.7 5.6 7.5 9.2 11 14.5
k max 1.2 1.5 1.6 2.2 2.5 3 4
m 2.35 2.7 2.9 4.4 4.6 6.6 8.7
t min 0.4 0.5 0.6 0.8 1 1.2 1.6


Metric Series Approx Count Per 50kg.
Dia M2 M2.5 M3 M4 M5 M6 M8
Length
3mm 495050 285714          
4mm 420168 242718 172414        
5mm 364964 211864 149254 73964      
6mm 328947 187970 131926 66313 41322    
8mm 259067 153374 107066 54945 34483 22831  
10mm 216450 129534 90090 47170 29412 19685 9940
12mm 186567 112108 77760 40984 25641 17301 8818
14mm 163399 98619 68399 36496 22831 15385 7937
16mm 116279 88183 60976 32680 20492 13889 7205
18mm 131234 79745 55066 29762 18587 12658 6605
20mm 119904 72780 50201 27174 17007 11601 6090
22mm   66934 46296 25126 15723 10730 5656
25mm   59666 40984 22523 14085 9634 5107
30mm     34722 19157 12019 8224 4386
35mm       16667 10753 7184 3846
40mm       14793 9259 6378 3425
45mm         8306 5727 3086
50mm             2809
55mm             2577


PAN HEAD - PHILLIPS  - DIN 7985



d1 M2 M2.5 M3 M4 M5 M6 M8
d2 4 5 6 8 10 12 16
k max 1.72 2.12 2.52 3.25 3.95 4.75 6.15
m 2.5 2.7 3.1 4.6 5.3 6.8 9
t min. 0.4 1.3 1.7 2.04 2.77 3.03 4.18


Metric Series Approx Count Per 50kg.
Dia M2 M2.5 M3 M4 M5 M6 M8
Length
3mm   147059          
4mm   135135 80515        
5mm   125000 75075 35714      
6mm   116279 70423 33784 18797    
8mm   102041 62657 30675 17182    
10mm   90909 57078 27933 15823 9728 4587
12mm   81967 52411 25773 14663 9107 4348
14mm   74627 48544 23810 13661 8562 4098
16mm   68493 45045 22222 12788 9452 3906
18mm   63291 42017 20747 12019 8865 3704
20mm   58824 39370 19531 11338 8333 3521
22mm   54945 37037 18382 10730 7874 3378
25mm   50000 34014 17007 9940 7278 3165
30mm   42373 29240 14535 8772 6452 2857
35mm       12690 7692 5814 2618
40mm       11261 6849 5263 2415
45mm         6250 4808 2242
50mm         5747 4425 2092
55mm             1969
60mm             1852