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Unit:mm

Cross Recessed Countersunk Head Tapping Screws - threaded portion are of class 1 to 4 [Annex attached table 2]

JIS B 1122 (AAT2) - 1996

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日标JIS B1122 (AAT2) - 1996 JIS1122 1122JI Cross Recessed Countersunk Head Tapping Screws - threaded portion are of class 1 to 4 [Annex attached table 2]
日标JIS B1122 (AAT2) - 1996 JIS1122 1122JI Cross Recessed Countersunk Head Tapping Screws - threaded portion are of class 1 to 4 [Annex attached table 2]
Nominal Length L Tips:seclect Nominal Length L and get .
Thread Size
d
2 2.5 3 3.5 4 4.5 5 6
dk max=nominal size
min
k max=nominal size
min
c ≈
r max
Socket No.
m Ref.
Penetration depth max
min
4 5 6 7 8 9 10 12
3.6 4.6 5.5 6.5 7.5 8.4 9.4 11.3
1.2 1.45 1.75 2 2.3 2.55 2.8 3.4
1 1.25 1.45 1.7 2 2.25 2.5 3
0.2 0.2 0.25 0.25 0.3 0.3 0.3 0.4
0.6 0.6 0.8 0.8 1.0 1.0 1.2 1.4
1 1 2 2 2 2 2 3
2.2 2.6 3.6 4.1 4.5 4.9 5.1 6.7
1.01 1.42 1.43 1.93 2.33 2.73 2.93 3.26
0.65 1.05 0.91 1.40 1.79 2.19 2.38 2.70
Thread Class
- - - - - - - -
①,For those of nominal diameter 2mm and 2.5mm, the Class 1 shall not be used.
②,The types of threaded portion shall be in accordance with the Annex to JIS B 1007
③,these screws are different from those in accordance with ISO 7049 to 7051 in shapes and dimensions threeof, and will be withdrawn in future.
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