DIN6921

DEFAULT SPECIFICATIONS

Brand HJ Tech
Standard DIN6921
Material Q195/SAE1035/10b21/40cr/SS304/SS316
Finish Zinc/Black/Dacromet/Magni  /Geomet/Zintek/Delta
Size M5-M20  

 

FEATURES

DIN 6921 Hex Flange Bolts are hex washer head bolts with external machine screw threads, a circular flange and smooth (non-serrated) bearing surface; the flange flares to a diameter that is larger than the hex top section. Clamping force is distributed over a larger area due to the integral head flange, which allows usage with irregular, misaligned and oversized holes. Flange bolts are often used with flange nuts. Steel Class 8.8 and 10.9 and stainless steel are available. For steel, zinc plated and plain finish (no surface treatment to inhibit rust) are common. Plain finish steel and stainless steel thread tolerance is 6g and plated steel is 6h; right-hand threads are standard. Also called hex flange screws, some are fully threaded while those that are partially threaded have a minimum threaded length that varies with bolt diameter and bolt length. Length is measured from under the head to the tip. DIN 6921 Hex Flange Bolts are similar to ISO 4162, JIS B1189, ASME B18.2.3.4M and IFI 536.

 

 

DIN6921

Description:

 

Thread Size P b c da dc ds du dw e f k k1 r1 r2 r3 r4 s t
  Coarse thread Fine thread-1 Fine thread-2 L≤125 125<L≤200 L>200 min type A max type B max max max min max min min max max min min max min max min max min
M5 0.8 / / 16 / / 1 5.7 6.2 11.8 5 4.82 5.5 9.8 8.71 1.4 5.4 2 0.25 0.3 0.1 3 8 7.78 0.15 0.05
M6 1 / / 18 / / 1.1 6.8 7.4 14.2 6 5.82 6.6 12.2 10.95 2 6.6 2.5 0.4 0.4 0.1 3.4 10 9.78 0.2 0.05
M8 1.25 1 / 22 28 / 1.2 9.2 10 18 8 7.78 9 15.8 14.26 2 8.1 3.2 0.4 0.5 0.15 4.3 13 12.73 0.25 0.1
M10 1.5 1.25 1 26 32 / 1.5 11.2 12.6 22.3 10 9.78 11 19.6 16.5 2 9.2 3.6 0.4 0.6 0.2 4.3 15 14.73 0.3 0.15
M12 1.75 1.5 1.25 30 36 / 1.8 13.7 15.2 26.6 12 11.73 13.5 23.8 17.62 3 11.5 4.6 0.6 0.7 0.25 6.4 16 15.73 0.35 0.15
M14 2 1.5 / 34 40 / 2.1 15.7 17.7 30.5 14 13.73 15.5 27.6 19.86 3 12.8 5.1 0.6 0.9 0.3 6.4 18 17.73 0.45 0.2
M16 2 1.5 / 38 44 57 2.4 17.7 20.7 35 16 15.73 17.5 31.9 23.15 3 14.4 5.8 0.6 1 0.35 6.4 21 20.67 0.5 0.25
M20 2.5 1.5 / 46 52 65 3 22.4 25.7 43 20 19.67 22 39.9 29.87 4 17.1 6.8 0.8 1.2 0.4 8.5 27 26.67 0.65 0.3

Contacts

Jiaxing H.J Tech Industry Limited
+86-573-84297069
[email protected]


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