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10.9 countersunk head / flat head six corners screw M12*20/25/30/40/50/60/70/80/90/100

price:USD$5.00
discount 70% in 2018-09-19 to 2018-09-21
price: USD$ 3.50
freight :USD$18.00,(Express)
freight :USD$7.00,(Postal parcel)
Minimum Order Quantity:3
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Impulse promotion Activity date: 2017-11-0110:55:20-2017-11-3010:55:20
Single order full100.00Yuan reduction5.00Yuan (not capped)
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brand EG/ Peng Chi hardware Texture of material 10.9 high strength
Name Countersunk six angle screw surface treatment Black
standard DIN7991 Packing instructions Plastic bag / carton
size For example: M6*30 (thread diameter 6mm thread length 30mm) with head length
Six corners inside the countersunk head Washer Spring washer Hexagon nut 304 bolts 12.9 stage bolt 10.9 bolts 8.8 level series

DIN934-1
There are positive and negative tolerances, especially the attention of the beat, screw reference specifications by D*L (diameter * total length) nut to the matching screw diameter is prevailSetting: mm
Nominal diameter M3 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20
pitch 0.5 0.7 0.8 1 1.25 1.5 1.75 2 2 2.5 2.5
dk max 6 8 10 12 16 20 24 27 30 33 36
min 5.7 7.64 9.64 11.57 15.57 19.48 23.48 26.48 29.48 32.38 35.38
S nominal 2 2.5 3 4 5 6 8 10 10 12 12
max 2.1 2.6 3.1 4.12 5.14 6.14 6.175 10.175 10.175 12.212 12.212
min 2.02 2.52 3.02 4.02 5.02 6.02 8.025 10.025 10.025 12.032 12.032
t max 1.2 1.8 2.3 2.5 3.5 4.4 4.6 4.8 5.3 5.5 5.9
min 0.95 1.55 2.05 2.25 3.2 4.1 4.3 4.5 5 5.2 5.6
a max 92°
min 90°

Choice of metric wrench for inner six angle screw

Metric wrench
Matching screw type
Six corners in the cylinder head
Six corners inside the countersunk head
Six corners inside the round head
Fastening screw
1.5mm M1.6
M2
______ _____ M3
2.0mm M2.5 M3 M3 M4
2.5mm M3 M4 M4 M5
3.0mm M4 M5 M5 M6
W1/4
4.0mm M5 M6 M6 M8
W5/16
5.0mm M6
W1/4
M8 M8 M10
W3/8
6.0mm M8
W5/16
M10 M10 M12
W1/4
8.0mm M10
W3/8
M12 M12 M16
W1/2
10mm M12
W1/2
M16 M16 M20
W5/8
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