TTUFS

Countersunk Wood Screw - Electro Galvanised

Suitable for interior use, the TTUFS screw has a serrated thread to reduce the resistance when driving.

It has a cut point which prevents cracking.

70mm or longer variants have an additional milling thread to further reduce the resistance.

Find it in the Solid Wood Application >
 

CE Marking
ETA
Service class 1
Electro-galvanized steel
Indoor
Solid Wood

Product Details

Images

Features

Features

  • 6 lobe drive.
  • Flat head with facet.
  • Type 17 point.
  • Serrated thread.
  • Electro galvanised.

Application

Suitable For

  • Wood to wood.

Technical Data

Dimensions

Product Dimensions

References Item Code NOB nr. Tun / DB nr. Fastener dimensions [mm]
d l dh d1 lg bit Thread
TTUFS3.0X16744145329381519499093166211T-10VG
TTUFS3.0X2074415532938261949910206215T-10VG
TTUFS3.0X2574416532938341949911256220T-10VG
TTUFS3.0X3074417532938451949912306225T-10VG
TTUFS3.0x4077606--4062-T-10VG
TTUFS3.5X16744185329385319499133.51672.211T-15VG
TTUFS3.5X20744195329386419499142072.215T-15VG
TTUFS3.5X25744205329387219499152572.220T-15VG
TTUFS3.5X30744215329388319499163072.225T-15VG
TTUFS3.5X35744225329389819499173572.230T-15VG
TTUFS3.5X40744235329390219499184072.235T-15VG
TTUFS4.0X207442553293921194992042082.515T-20VG
TTUFS4.0X25744265329393619499212582.520T-20VG
TTUFS4.0X35744285329395519499233582.530T-20VG
TTUFS4.0X70744335329400419499287082.540T-20VG
TTUFS4.5X25744345329401219499294.5258.42.820T-20VG
TTUFS4.5X3074435532940231949930308.42.825T-20VG
TTUFS4.5X7074441532940801949937708.42.840T-20TG
TTUFS4.5X8074442532940951949938808.42.850T-20TGR
TTUFS5.0X30743735329412519499415309.53.125T-25VG
TTUFS5.0x3577629--359.53.130T-25VG
TTUFS5.0x4577631--459.53.140T-25VG
TTUFS5.0X60 PT74376532941521949944609.53.135T-25TG
TTUFS5.0X7074377532941631949945709.53.140T-25VG
TTUFS5.0X8074378532941781949946809.53.140T-25TGR
TTUFS5.0X9074379532941821949947909.53.145T-25TGR
TTUFS5.0X100744435329410619499391009.53.160T-25TGR
TTUFS5.0X120743725329411419499401209.53.160T-25TGR
TTUFS6.0x3077636--63011.63.724T-30VG
TTUFS6.0X40744555329424619499534011.63.734T-30VG
TTUFS6.0X50744575329425419499545011.63.730T-30TG
TTUFS6.0X60744585329426519499556011.63.735T-30TG
TTUFS6.0X70744595329427319499567011.63.740T-30TG
TTUFS6.0X80744605329428419499578011.63.740T-30TGR
TTUFS6.0X90744615329429219499589011.63.745T-30TGR
TTUFS6.0X1007438053294197194994810011.63.760T-30TGR
TTUFS6.0X1207445153294201194994912011.63.770T-30TGR
TTUFS6.0X1407445253294216194995014011.63.770T-30TGR
TTUFS6.0X1607445353294220194995116011.63.770T-30TGR
TTUFS6.0X1807445453294235194995218011.63.770T-30TGR

Diameters 3.0, 3.5 and 4.0 screws are not CE marked.

FT = Full Thread
PT = Partial Thread
PTM = Parial Thread with Milling Thread

Product characteristic properties

References Characteristic Yield Moment – My,k [Nmm] Characteristic withdrawal parameter - fax,k,90° [N/mm²] Characteristic head pull-through parameter - fhead,k [N/mm²] Characteristic tensile capacity - ftens,k [kN]
TTUFS4.5X25466014.715.67.8
TTUFS4.5X30466014.715.67.8
TTUFS4.5X70466014.715.67.8
TTUFS4.5X80466014.715.67.8
TTUFS5.0X3067201517.17.9
TTUFS5.0x3567201517.17.9
TTUFS5.0x4567201517.17.9
TTUFS5.0X60 PT67201517.17.9
TTUFS5.0X7067201517.17.9
TTUFS5.0X8067201517.17.9
TTUFS5.0X9067201517.17.9
TTUFS5.0X10067201517.17.9
TTUFS5.0X12067201517.17.9
TTUFS6.0x30950012.516.611.1
TTUFS6.0X40950012.516.611.1
TTUFS6.0X50950012.516.611.1
TTUFS6.0X60950012.516.611.1
TTUFS6.0X70950012.516.611.1
TTUFS6.0X80950012.516.611.1
TTUFS6.0X90950012.516.611.1
TTUFS6.0X100950012.516.611.1
TTUFS6.0X120950012.516.611.1
TTUFS6.0X140950012.516.611.1
TTUFS6.0X160950012.516.611.1
TTUFS6.0X180950012.516.611.1

Refer to relevant ITTR or ETA for more details

Installation

Installation

Spacing and Edge distances - Shear loaded screws

References Minimum edge distances and spacing for shear loaded screws [mm]
Angle between load and grain = 0° Angle between load and grain = 90°
a1.0 a2.0 a3.t.0 a3.c.0 a4.t.0 a4.c.0 a1.90 a2.90 a3.t.90 a3.c.90 a4.t.90 a4.c.90
TTUFS4.5X25------------
TTUFS4.5X30------------
TTUFS4.5X70------------
TTUFS4.5X80------------
TTUFS5.0X30------------
TTUFS5.0x35------------
TTUFS5.0x45------------
TTUFS5.0X60 PT------------
TTUFS5.0X70------------
TTUFS5.0X80------------
TTUFS5.0X90------------
TTUFS5.0X100------------
TTUFS5.0X120------------
TTUFS6.0x30------------
TTUFS6.0X40------------
TTUFS6.0X50------------
TTUFS6.0X60------------
TTUFS6.0X70------------
TTUFS6.0X80------------
TTUFS6.0X90------------
TTUFS6.0X100------------
TTUFS6.0X120------------
TTUFS6.0X140------------
TTUFS6.0X160------------
TTUFS6.0X180------------

a1 and a2 can be multiplied by 0.85 for panel/timber assembly, and by 0.7 for steel/timber assembly.

Spacing and edge distances - Axially loaded screws

References Minimum edge distances and spacing for axially loaded screws [mm]
a1 a2 a3.c a4.c
TTUFS4.5X25----
TTUFS4.5X30----
TTUFS4.5X70----
TTUFS4.5X80----
TTUFS5.0X30----
TTUFS5.0x35----
TTUFS5.0x45----
TTUFS5.0X60 PT----
TTUFS5.0X70----
TTUFS5.0X80----
TTUFS5.0X90----
TTUFS5.0X100----
TTUFS5.0X120----
TTUFS6.0x30----
TTUFS6.0X40----
TTUFS6.0X50----
TTUFS6.0X60----
TTUFS6.0X70----
TTUFS6.0X80----
TTUFS6.0X90----
TTUFS6.0X100----
TTUFS6.0X120----
TTUFS6.0X140----
TTUFS6.0X160----
TTUFS6.0X180----

Abacus

Timber to Timber characteristic capacities

References Product characteristic capacities - Timber to Timber C24
Axial resistance Shear resistance parallel to the grain depending of t1 [Rv.0.k] [kN] Shear resistance perpendicular to the grain depending of t1 [Rv.90.k] [kN]
t1 [mm] Rax.k [kN] 35 [mm] 40 [mm] 45 [mm] 60 [mm] 75 [mm] 80 [mm] ≥100 [mm] 35 [mm] 40 [mm] 45 [mm] 60 [mm] 75 [mm] 80 [mm] ≥100 [mm]
TTUFS5.0X80401.641.641.641.64----1.641.641.64----
TTUFS5.0X90451.641.641.641.64----1.641.641.64----
TTUFS5.0X100401.641.641.641.64----1.641.641.64----
TTUFS5.0X120601.641.641.641.641.64---1.641.641.641.64---
TTUFS6.0X80402.732.092.092.15----2.092.092.15----
TTUFS6.0X90452.732.092.092.15----2.092.092.15----
TTUFS6.0X100402.732.092.092.15----2.092.092.15----
TTUFS6.0X120502.732.092.092.15----2.092.092.15----
TTUFS6.0X140702.732.092.092.152.152.15--2.092.092.152.152.15--
TTUFS6.0X160902.732.092.092.152.152.152.15-2.092.092.152.152.152.15-
TTUFS6.0X1801102.732.092.092.152.152.152.152.152.092.092.152.152.152.152.15

These capacities are valid for:

  • Timber element under the head with thickness ≤ t1 disclosed in adjacent column
  • Screw axis between 45° and 90° from timber grain for ESCR(XXX), and 90° from timber grain for all other screws.

For tightening screws (partially threaded), t1 dimension is the maximum thickness of the under-head timber member for which the thread is fully in the pointside timber member, for an optimum installation and tightening.

The shear capacities are given for several timber thicknesses t1 of the under-head member under the following configurations:

  • Load axis at 0° from both timber grains Rv.0°.k
  • Load axis at 90° from both timber grains Rv.90°.k

These capacities are valid for C24 timber grades or higher
The pre-drilled hypothesis for capacity and distances calculation is fulfilled.
For partial threaded screws, capacities are only given for configurations where the thread is less than 5mm in under-head timber member, in order to achieve optimum installation and tightening.
Clause (2) in 8.3.1.2 from EN1995-1-1:2004+A2:2014 about embedment length is ignored in these calculations.

Steel to Timber characteristic capacities

References Product characteristic capacities - Steel to Timber C24
Axial resistance [Rax.st.k] [kN] Shear resistance - Thin plate Shear Resistance - Thick steel
Rv.0.st.k [kN] Rv.90.st.k [kN] Rv.0.st.k [kN] Rv.90.st.k [kN]
TTUFS4.5X251.730.80.81.541.54
TTUFS4.5X302.160.980.981.771.77
TTUFS4.5X703.461.981.982.442.44
TTUFS4.5X804.322.192.192.652.65
TTUFS5.0X301.651.11.11.871.87
TTUFS5.0X60 PT2.311.981.982.562.56
TTUFS5.0X702.642.062.062.642.64
TTUFS5.0X802.642.062.062.642.64
TTUFS5.0X902.972.142.142.722.72
TTUFS5.0X1003.962.392.392.972.97
TTUFS5.0X1203.962.392.392.972.97
TTUFS6.0X403.511.741.743.053.05
TTUFS6.0X503.12.22.23.333.33
TTUFS6.0X603.612.662.663.643.64
TTUFS6.0X704.132.962.963.763.76
TTUFS6.0X804.132.962.963.763.76
TTUFS6.0X904.643.093.093.893.89
TTUFS6.0X1006.193.483.484.284.28
TTUFS6.0X1207.223.743.744.544.54
TTUFS6.0X1407.223.743.744.544.54
TTUFS6.0X1607.223.743.744.544.54
TTUFS6.0X1807.223.743.744.544.54

Shear capacities are given for thick (tst = d) and thin (tst = 0,5xd) steel plates under the following configurations:

  • Load axis at 0° from timber grain Rv.0°.k
  • Load axis at 90° from timber grain Rv.90°.k

These capacities are valid for C24 timber grades or higher.
For intermediate steel thicknesses, capacities shall be calculated by linear interpolation between the limiting thin and thick plate values.
The pre-drilled hypothesis for capacity and distances calculation is fulfilled.

Ledger on stud characteristic capacities

References Product characteristic capacities - Ledger on stud C24
Minimum width of the stud [mm] Minimum distance to the bottom side of the ledger a4,c [mm] Shear capacity depending of thickness of ledger t1 [Rv.90-0.k] [kN]
35 [mm] 40 [mm] 45 [mm] 60 [mm] 75 [mm] 80 [mm] 90 [mm] ≥100 [mm]
TTUFS4.5X25----------
TTUFS4.5X30----------
TTUFS4.5X702713.51.41-------
TTUFS4.5X802713.51.41-------
TTUFS5.0X303015--------
TTUFS5.0x35----------
TTUFS5.0x45----------
TTUFS5.0X60 PT3015--------
TTUFS5.0X7030151.81-------
TTUFS5.0X8030151.811.811.81-----
TTUFS5.0X9030151.811.811.81-----
TTUFS5.0X10030151.811.811.81-----
TTUFS5.0X12030151.811.811.811.81----
TTUFS6.0x30----------
TTUFS6.0X403618--------
TTUFS6.0X503618--------
TTUFS6.0X603618--------
TTUFS6.0X7036182.44-------
TTUFS6.0X8036182.622.62.44-----
TTUFS6.0X9036182.622.622.62-----
TTUFS6.0X10036182.622.622.62-----
TTUFS6.0X12036182.622.622.62-----
TTUFS6.0X14036182.622.622.622.622.62---
TTUFS6.0X16036182.622.622.622.622.622.622.62-
TTUFS6.0X18036182.622.622.622.622.622.622.622.62

The pre-drilled hypothesis for capacity and distances calculation is fulfilled.

Panel to Timber characteristic capacities

References Panel (OSB, Fibreboard ρk≥380 kg/m3) on Timber C24 depending on panel thickness tp
13 [mm] 15 [mm] 18 [mm] 22 [mm] 25 [mm]
Rax.k.13 [kN] Rv.0.k.13 [kN] Rv.90.k.13 [kN] Rax.k.15 [kN] Rv.0.k.15 [kN] Rv.90.k.15 [kN] Rax.k.18 [kN] Rv.0.k.18 [kN] Rv.90.k.18 [kN] Rax.k.22 [kN] Rv.0.k.22 [kN] Rv.90.k.22 [kN] Rax.k.25 [kN] Rv.0.k.25 [kN] Rv.90.k.25 [kN]
TTUFS4.5X25---------------
TTUFS4.5X30---0.56-----------
TTUFS4.5X700.560.840.840.560.880.880.560.940.940.711.061.060.711.061.06
TTUFS4.5X80---------------
TTUFS5.0X30---------------
TTUFS5.0x35---------------
TTUFS5.0x45---------------
TTUFS5.0X60 PT0.721.031.030.721.061.060.721.111.110.91.241.240.91.311.31
TTUFS5.0X700.721.031.030.721.061.060.721.111.110.91.241.240.91.311.31
TTUFS5.0X800.721.031.030.721.061.060.721.111.110.91.241.240.91.311.31
TTUFS5.0X900.721.031.030.721.061.060.721.111.110.91.241.240.91.311.31
TTUFS5.0X1000.721.031.030.721.061.060.721.111.110.91.241.240.91.311.31
TTUFS5.0X1200.721.031.030.721.061.060.721.111.110.91.241.240.91.311.31
TTUFS6.0x30---------------
TTUFS6.0X40---------------
TTUFS6.0X50---------------
TTUFS6.0X601.081.311.311.081.361.361.081.411.411.351.561.561.351.641.64
TTUFS6.0X701.081.311.311.081.361.361.081.411.411.351.561.561.351.641.64
TTUFS6.0X801.081.311.311.081.361.361.081.411.411.351.561.561.351.641.64
TTUFS6.0X901.081.311.311.081.361.361.081.411.411.351.561.561.351.641.64
TTUFS6.0X1001.081.311.311.081.361.361.081.411.411.351.561.561.351.641.64
TTUFS6.0X1201.081.311.311.081.361.361.081.411.411.351.561.561.351.641.64
TTUFS6.0X1401.081.311.311.081.361.361.081.411.411.351.561.561.351.641.64
TTUFS6.0X1601.081.311.311.081.361.361.081.411.411.351.561.561.351.641.64
TTUFS6.0X1801.081.311.311.081.361.361.081.411.411.351.561.561.351.641.64

Plywood to Timber Characteristic Capacities

References Plywood (ρk≥490 kg/m3) on Timber C24 depending on panel thickness tp
10 [mm] 15 [mm] 18 [mm] 22 [mm] 25 [mm] 30 [mm]
Rax.k.10 [kN] Rv.0.k.10 [kN] Rv.90.k.10 [kN] Rax.k.15 [kN] Rv.0.k.15 [kN] Rv.90.k.15 [kN] Rax.k.18 [kN] Rv.0.k.18 [kN] Rv.90.k.18 [kN] Rax.k.22 [kN] Rv.0.k.22 [kN] Rv.90.k.22 [kN] Rax.k.25 [kN] Rv.0.k.25 [kN] Rv.90.k.25 [kN] Rax.k.30 [kN] Rv.0.k.30 [kN] Rv.90.k.30 [kN]
TTUFS4.5X25------------------
TTUFS4.5X30------------------
TTUFS4.5X700.690.940.940.691.011.010.691.081.081.641.441.441.641.51.46---
TTUFS4.5X80------------------
TTUFS5.0X30------------------
TTUFS5.0x35------------------
TTUFS5.0x45------------------
TTUFS5.0X60 PT0.881.141.140.881.21.20.881.281.282.071.591.591.881.561.78---
TTUFS5.0X700.881.141.140.881.21.20.881.281.282.071.591.591.881.561.78---
TTUFS5.0X800.881.141.140.881.21.20.881.281.282.071.591.591.881.561.78---
TTUFS5.0X900.881.141.140.881.21.20.881.281.282.071.591.591.881.561.78---
TTUFS5.0X1000.881.141.140.881.21.20.881.281.282.071.591.591.881.561.78---
TTUFS5.0X1200.881.141.140.881.21.20.881.281.282.071.591.591.881.561.78---
TTUFS6.0x30------------------
TTUFS6.0X40------------------
TTUFS6.0X50------------------
TTUFS6.0X601.321.481.481.321.531.531.321.611.612.632.052.052.632.112.11---
TTUFS6.0X701.321.481.481.321.531.531.321.611.6132.152.1532.252.25---
TTUFS6.0X801.321.481.481.321.531.531.321.611.613.12.172.173.12.272.27---
TTUFS6.0X901.321.481.481.321.531.531.321.611.613.12.172.173.12.272.27---
TTUFS6.0X1001.321.481.481.321.531.531.321.611.613.12.172.173.12.272.27---
TTUFS6.0X1201.321.481.481.321.531.531.321.611.613.12.172.173.12.272.27---
TTUFS6.0X1401.321.481.481.321.531.531.321.611.613.12.172.173.12.272.27---
TTUFS6.0X1601.321.481.481.321.531.531.321.611.613.12.172.173.12.272.27---
TTUFS6.0X1801.321.481.481.321.531.531.321.611.613.12.172.173.12.272.27---

Certification

Declaration of Performance (DoP)

uk-dop-e21-0670.pdf (686.07 KB)

European Technical Assessment (ETA)

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