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Unit:mm

Cross Recessed Pan Head Tapping Screws - threaded portion are of class 1 to 4 [Annex Attached Table 1]

JIS B 1122 (AAT1) - 1996

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日标JIS B1122 (AAT1) - 1996 JIS1122 1122JI Cross Recessed Pan Head Tapping Screws - threaded portion are of class 1 to 4 [Annex Attached Table 1]
Nominal Length L Tips:seclect Nominal Length L and get .
Thread Size
d
2 ① 2.5 ① 3 3.5 4 4.5 5 6
dk max=nominal size
min
k Nominal Size
max
min
R1 ≈
R2 ≈
Socket No.
m Type H Ref.
Penetration depth Type H min
max
r max
3.5 4.5 5.5 6 7 8 9 10.5
3.1 4.1 5 5.5 6.5 7.4 8.4 9.8
1.3 1.7 2 2.3 2.6 2.9 3.3 3.9
1.4 1.8 2.15 2.45 2.75 3.05 3.45 4.1
1.2 1.6 1.85 2.15 2.45 2.75 3.15 3.7
4.5 6 7 8 9 11 12 14
0.6 0.8 1.0 1.1 1.3 1.5 1.6 1.9
1 1 2 2 2 2 2 3
2.2 2.6 3.6 3.9 4.2 4.6 4.9 6.3
1.01 1.42 1.43 1.73 2.03 2.43 2.73 2.86
0.60 1.00 0.86 1.15 1.45 1.83 2.14 2.26
0.3 0.3 0.4 0.4 0.5 0.5 0.6 0.7
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screws are different from those in accordance with ISO 7049 to 7051 in shapes and dimensions threeof, and will be withdrawn in future.
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JIS B 1122 (AAT4) - 1996 		Cross Recessed Truss Head Tapping Screws - threaded portion are of class 1 to 4 [Annex attached table 4]
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