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  Hex Bolts  
    Product Model :  GB21-76
 
 
GB21-76 M8 M10 M12 M14 M16 M18 M20
Screw Length when Bolt Length 125L 22+3.00 26+3.50 30+4.00 34+4.50 38+4.50 42+5.00 46+5.00
When Bolt Length but 200 - L 28+3.00 32+3.50 36+4.00 40+4.50 44+4.50 48+5.00 52+5.00
When Bolt Length but 200200 L     45+3.50 49+4.00 53+4.50 57+4.50 61+5.00 65+5.00
Full thread allowed for this length. 35.00 45.00 50.00 55.00 65.00 70.00 75.00
Thread Rolled Blank (6gGrade) D MAX 7.10 8.90 10.70 12.55 14.55 16.20 18.20
MIN 7.05 8.85 10.65 12.50 14.50 16.15 18.15
Thick Rod Diameter D3 MAX 8.00 10.00 12.00 14.00 16.00 18.00 20.00
MIN 7.05 8.85 10.65 12.50 14.50 16.15 18.15
hexangular subtense S MAX 12.00 14.00 17.00 19.00 22.00 24.00 27.00
MIN 11.76 13.76 16.76 13.72 21.72 23.72 26.72
Head Height H MAX 5.24 6.24 7.29 8.29 9.29 10.29 11.35
MIN 4.76 5.76 6.71 7.71 8.71 9.71 10.65
When Bolt Length but 200 Tolerance L2

DiameterM5 - M20

5-8 10-25 28-50 55-100 >110            
+0.40 +0.70 +1.00 +1.30 +1.50            
-0.40 -0.70 -1.00 -1.30 -1.50             
 
  (4.6,4.8,6.8,8.8,10.9,12.9Grade)
 
 
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