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DIN6921 Flange Bolt Carbon Steel Black Oxide Grade 8.8 10.9 12.9

DIN6921 Flange Bolt Carbon Steel Black Oxide Grade 8.8 10.9 12.9

Short Description:

Standard: DIN6921

Product Name: Flange Bolt

Key Words: DIN6921, Flange Bolt, Half Thread Flange Bolt

Size: M3-M42

Material: 45#, 35K, 10B21, 40Cr, 35CrMo

Stength Grade: 8.8, 10.9, 12.9

Surface Treatment: Black oxide

Thread Length: Full Thread/ Half Thread

Thread Type: Coarse/Fine

Packing: Bag/Carton/Wooden case

Other Features: Offer customized head mark


Product Detail

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Description

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70% items delivered within 5 days

80% items delivered within 7 days

90% items delivered within 10 days

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Flange Bolt Black oxide 6
图片1
d M5 M6 M8 M10 M12 M14 M16 M20
P Pitch Coarse 0.8 1 1.25 1.5 1.75 2 2 2.5
Fine thread1 / / 1 1.25 1.5 1.5 1.5 1.5
Fine thread2 / / / 1 1.25 / / /
b L≤125 16 18 22 26 30 34 38 46
125<L≤200 / / 28 32 36 40 44 52
L>200 / / / / / / 57 65
c Min 1 1.1 1.2 1.5 1.8 2.1 2.4 3
da Type A Max 5.7 6.8 9.2 11.2 13.7 15.7 17.7 22.4
Type B Max 6.2 7.4 10 12.6 15.2 17.7 20.7 25.7
dc Max 11.8 14.2 18 22.3 26.6 30.5 35 43
ds Max 5 6 8 10 12 14 16 20
Min 4.82 5.82 7.78 9.78 11.73 13.73 15.73 19.67
du Max 5.5 6.6 9 11 13.5 15.5 17.5 22
dw Min 9.8 12.2 15.8 19.6 23.8 27.6 31.9 39.9
e Min 8.71 10.95 14.26 16.5 17.62 19.86 23.15 29.87
f Max 1.4 2 2 2 3 3 3 4
k Max 5.4 6.6 8.1 9.2 11.5 12.8 14.4 17.1
k1 Min 2 2.5 3.2 3.6 4.6 5.1 5.8 6.8
r1 Min 0.25 0.4 0.4 0.4 0.6 0.6 0.6 0.8
r2 Max 0.3 0.4 0.5 0.6 0.7 0.9 1 1.2
r3 Min 0.1 0.1 0.15 0.2 0.25 0.3 0.35 0.4
r4 3 3.4 4.3 4.3 6.4 6.4 6.4 8.5
s Max=Nominal 8 10 13 15 16 18 21 27
Min 7.78 9.78 12.73 14.73 15.73 17.73 20.67 26.67

Detail description

Flange Bolt Black oxide 7
black flange bolt Din6921

Flange bolts. According to the thread classification of Metric standard and ASME standard, according to the head shape it has flat head and concave head.  Flat bottom and serrated bottom can be assigned according to the appearance of the bottom of the head.  The common grade is 8.8, 10.9 and 12.9, and the American grade is Grade 5 and Grade 8.  Materials are 304 stainless steel, 316 stainless steel, 35K, 45# steel, 10B21, 40Cr, 35CrMo, etc.  And we also provide customized service, the head side and flange diameter and head mark can be customized, the minimum order weight is 1000 kg or equivalent quantity.

Flange bolt is composed of hexagonal head and flange plate, its "support area to stress area word ratio" is greater than the ordinary bolt, so this bolt can bear higher preload, anti-loose performance is also better, so it is widely used in automobile engines, heavy machinery and other products.

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