Skip
 Home Product norms UNI 7346
Send your request for quotation

UNI 7346 Standard Dimensions for Hammer drive screws with round head

Stock / Supplier search Send your request for quotation
This norm has been cancelled

Hammer drive screws with round head

Dimensional Drawing and Technical Diagrams

1411_4307.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source UNI 7346 - WITHDRAWN
Publication date: 11/1974
d nominal thread size D min/max h min/max d1 min/max
s
 hole Ø hard materials hole Ø soft materials
1.5 2.28÷2.5 0.66÷0.87 1.18÷1.24 1.19 1.32 1.31
1.9 3÷3.22 1.05÷1.24 1.52÷1.6 1.19 1.75 1.7
2.5 3.7÷4.1 1.5÷1.75 2.03÷2.1 1.19 2.2 2.1
2.9 4.9÷5.35 1.9÷2.18 2.34÷2.43 1.19 2.7 2.6
3.5 6.06÷6.6 2.3÷2.6 2.84÷2.94 1.59 3.1 3
4.2 7.24÷7.84 2.7÷ 3.05 3.35÷3.45 1.98 3.7 3.6
4.5 8.49÷ 9.1 3.12÷3.47 3.71÷3.8 1.98 4.2 4
5.3 9.7÷10.35 3.53÷3.88 4.39÷4.5 3.18 4.9 4.7
6.1 10.9÷11.6 3.93÷4.3 5.02÷5.13 3.18 5.7 5.4

Dimensions in Inches - source BS 4174 type U
Publication date: 1972
d nominal thread size Nr. of thread d min/max D min/max h min/max d1 min/max
s nom
 drill Ø hole Ø
No.00 6 0.057÷0.06 0.09÷0.099 0.026÷0.034 0.046÷0.049 0.02 55 0.052
No.0 6 0.072÷0.075 0.116÷0.127 0.041÷0.049 0.06÷0.063 0.035 51 0.067
No.2 8 0.097÷0.1 0.146÷0.162 0.059÷0.069 0.08÷0.083 0.045 44 0.086
No.4 7 0.112÷0.116 0.193÷0.211 0.075÷0.086 0.092÷0.096 0.062 37 0.104
No.6 7 0.136÷0.14 0.24÷0.26 0.091÷0.103 0.112÷0.116 0.078 31 0.12
No.7 8 0.15÷0.154 0.264÷0.285 0.099÷0.111 0.122÷0.126 0.096 29 0.136
No.8 8 0.162÷0.167 0.287÷0.309 0.107÷0.12 0.132÷0.136 0.125 27 0.144
No.10 8 0.177÷0.182 0.334÷0.359 0.123÷0.137 0.146÷0.15 0.125 20 0.161
No.12 8 0.206÷0.212 0.382÷0.408 0.139÷0.153 0.173÷0.177 0.142 11 0.191

UNI 7346 - Approx. weights, in kg x1000 pcs, (ρ=7,85 kg/dm3) - commercial lengths
d thread size 1.5 1.9 2.5 2.9 3.5 4.2 4.5 5.3 6.1
nominal length l
3.5 0.03 0.1 0.18
5 0.07 0.12 0.21 0.4
6.5 0.09 0.13 0.25 0.44 0.73
8 0.16 0.3 0.49 0.79 1.08 1.66
9.5 0.33 0.53 0.88 1.29 1.97
13 0.68 1.08 1.76 2.65 2.7 3.44
16 2.17 3.3 3.35 4.24
19 3.95 5.03

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
WARNING - The datasheets provided by this site (fasten.it) are only advisory in support of the commercial activity and their use by anyone is entirely voluntary. Reliance on their contents for any purpose by anyone is at his/her sole risk and Fasten.it s.r.l./www.fasten.it is not responsible for any loss, claim or damage arising there from.