S.N Malhotra Industries

DIN 603 - Mushroom head square neck bolts

Current norm: DIN 603
Equivalent norms: ISO 8677; CSN 021319; PN 82406; UNI 5731;

 

Legend:               

b – length of the thread (at least)
l – length of bolt
d – the nominal diameter of the thread
k – head height
ds – diameter of the screw shank
dk – head diameter
f – height squared
v – width of the square
r1 – Head radius
lg – length of the shank to thread
ls – length of the shank to the start of the thread

Makings:

Steel: 4.6,8.8
Stainless: A2, A4
Plastic: –
Non Ferrous: –
Thread: 6g

Notes:

Table according to DIN 603:

dimensions in mm
Thread dM5M6M8M10M12M16M20
P0,811,251,51,7522,5
bl < 125mm16182226303846
125 < l < 200mm22242832364452
l > 200mm4145495765
dkmax.13,5516,5520,6524,6530,6538,846,8
min.12,4515,4519,3523,3529,3537,245,2
dsmax.56810121620
min.4,525,527,429,4211,315,319,16
fmax.4,14,65,66,68,7512,915,9
min.2,93,44,45,47,2511,114,1
kmax.3,33,884,885,386,958,9511,05
min.2,73,124,124,626,058,059,95
r1approx.10,712,61619,224,129,333,9
r2max.0,50,50,50,5111
r3max.0,750,91,21,51,82,43
vmax.5,486,488,5810,5812,716,720,84
min.4,525,527,429,4211,315,319,16

Tab 2.

lM5M6M8M10M12M16M20
nominal sizemin.max.ls min.lg max.ls min.lg max.ls min.lg max.ls min.lg max.ls min.lg max.ls min.lg max.ls min.lg max.
1615,116,9810          
2018,9521,058101214      
2523,9526,058101214      
3028,9531,051810121418    
3533,7536,2515191217121418    
4038,7541,252024172211,75181418    
4543,7546,252529222716,752311,51918    
5048,7551,253034273221,752816,52418    
5553,556,53539323726,753321,52916,252523  
6058,561,54044374231,753826,53421,253023  
6563,566,54549424736,754331,53926,75351727  
7068,571,55054475241,754836,54431,2540223228,5
8078,581,56064576251,755846,55441,2550324221,534
9088,2591,75  677261,756856,56451,2560425231,544
10098,25101,75  778271,757866,57461,2570526241,554
110108,25111,75  879281,758876,58471,2580627251,564
120118,25121,75  9710291,759886,59481,2590728261,574
130128132  10110695,7510290,59885,2594768665,578
140138142  111116105,75112108,510895,25104869675,58
150148152  121126115,75122110,5118105,251149610685,598
160156164      120,5128115,2512410611695,5108
180176184      140,5148135,25144126136115,5128
200195,4204,6      160,5168155,25164146156135,5148