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 >

Technical Data Sheet

CE Marking

ETA

Service class 1

Electro-galvanized steel

Indoor

EPD

Fastener Designer

Technical Data

Dimensions

Product Dimensions

References	Item Code	NOB nr.	Tun / DB nr.	Fastener dimensions [mm]							Weight [kg]
References	Item Code	NOB nr.	Tun / DB nr.	d	l	d_h	d₁	l_g	bit	Thread	Weight [kg]
TTUFS4.5X50 PT	74439	53294061	1949935	4.5	50	8.4	2.8	30	T-20	TG	0.003
TTUFS5.0X70	74377	53294163	1949945	5	70	9.5	3.1	40	T-25	VG	0.006
TTUFS5.0X80	74378	53294178	1949946		80	9.5	3.1	40	T-25	TGR	0.006
TTUFS5.0X90	74379	53294182	1949947		90	9.5	3.1	45	T-25	TGR	0.007
TTUFS5.0X100	74443	53294106	1949939		100	9.5	3.1	60	T-25	TGR	0.008
TTUFS6.0X40	74455	53294246	1949953	6	40	11.6	3.7	34	T-30	VG	0.005
TTUFS6.0X50	74457	53294254	1949954		50	11.6	3.7	30	T-30	TG	0.006
TTUFS6.0X60	74458	53294265	1949955		60	11.6	3.7	35	T-30	TG	0.007
TTUFS6.0X70	74459	53294273	1949956		70	11.6	3.7	40	T-30	TG	0.008
TTUFS6.0X80	74460	53294284	1949957		80	11.6	3.7	40	T-30	TGR	0.01
TTUFS6.0X90	74461	53294292	1949958		90	11.6	3.7	45	T-30	TGR	0.011
TTUFS6.0X100	74380	53294197	1949948		100	11.6	3.7	60	T-30	TGR	0.012
TTUFS6.0X120	74451	53294201	1949949		120	11.6	3.7	70	T-30	TGR	0.015
TTUFS6.0X140	74452	53294216	1949950		140	11.6	3.7	70	T-30	TGR	0.016
TTUFS6.0X160	74453	53294220	1949951		160	11.6	3.7	70	T-30	TGR	0.018
TTUFS6.0X180	74454	53294235	1949952		180	11.6	3.7	70	T-30	TGR	0.021

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 – M_y,k [Nmm]	Characteristic withdrawal parameter - f_ax,k,90° [N/mm²]	Characteristic head pull-through parameter - f_head,k [N/mm²]	Characteristic tensile capacity - f_tens,k [kN]
TTUFS4.5X50 PT	4660	14.7	15.6	7.8
TTUFS5.0X70	6720	15	17.1	7.9
TTUFS5.0X80	6720	15	17.1	7.9
TTUFS5.0X90	6720	15	17.1	7.9
TTUFS5.0X100	6720	15	17.1	7.9
TTUFS6.0X40	9500	12.5	16.6	11.1
TTUFS6.0X50	9500	12.5	16.6	11.1
TTUFS6.0X60	9500	12.5	16.6	11.1
TTUFS6.0X70	9500	12.5	16.6	11.1
TTUFS6.0X80	9500	12.5	16.6	11.1
TTUFS6.0X90	9500	12.5	16.6	11.1
TTUFS6.0X100	9500	12.5	16.6	11.1
TTUFS6.0X120	9500	12.5	16.6	11.1
TTUFS6.0X140	9500	12.5	16.6	11.1
TTUFS6.0X160	9500	12.5	16.6	11.1
TTUFS6.0X180	9500	12.5	16.6	11.1

Refer to relevant ITTR or ETA for more details

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°
	a_1.0	a_2.0	a_3.t.0	a_3.c.0	a_4.t.0	a_4.c.0	a_1.90	a_2.90	a_3.t.90	a_3.c.90	a_4.t.90	a_4.c.90
TTUFS4.5X50 PT	-	-	-	-	-	-	-	-	-	-	-	-
TTUFS5.0X70	-	-	-	-	-	-	-	-	-	-	-	-
TTUFS5.0X80	-	-	-	-	-	-	-	-	-	-	-	-
TTUFS5.0X90	-	-	-	-	-	-	-	-	-	-	-	-
TTUFS5.0X100	-	-	-	-	-	-	-	-	-	-	-	-
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]
References	a₁	a₂	a_3.c	a_4.c
TTUFS4.5X50 PT	-	-	-	-
TTUFS5.0X70	-	-	-	-
TTUFS5.0X80	-	-	-	-
TTUFS5.0X90	-	-	-	-
TTUFS5.0X100	-	-	-	-
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]	R_ax.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]
TTUFS5.0X80	40	1.64	1.64	1.64	1.64	-	-	-	-	1.64	1.64	1.64	-	-	-	-
TTUFS5.0X90	45	1.64	1.64	1.64	1.64	-	-	-	-	1.64	1.64	1.64	-	-	-	-
TTUFS5.0X100	40	1.64	1.64	1.64	1.64	-	-	-	-	1.64	1.64	1.64	-	-	-	-
TTUFS6.0X80	40	2.73	2.09	2.09	2.15	-	-	-	-	2.09	2.09	2.15	-	-	-	-
TTUFS6.0X90	45	2.73	2.09	2.09	2.15	-	-	-	-	2.09	2.09	2.15	-	-	-	-
TTUFS6.0X100	40	2.73	2.09	2.09	2.15	-	-	-	-	2.09	2.09	2.15	-	-	-	-
TTUFS6.0X120	50	2.73	2.09	2.09	2.15	-	-	-	-	2.09	2.09	2.15	-	-	-	-
TTUFS6.0X140	70	2.73	2.09	2.09	2.15	2.15	2.15	-	-	2.09	2.09	2.15	2.15	2.15	-	-
TTUFS6.0X160	90	2.73	2.09	2.09	2.15	2.15	2.15	2.15	-	2.09	2.09	2.15	2.15	2.15	2.15	-
TTUFS6.0X180	110	2.73	2.09	2.09	2.15	2.15	2.15	2.15	2.15	2.09	2.09	2.15	2.15	2.15	2.15	2.15

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 R_v.0°.k
Load axis at 90° from both timber grains R_v.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
	Axial resistance [Rax.st.k] [kN]	R_v.0.st.k [kN]	R_v.90.st.k [kN]	R_v.0.st.k [kN]	R_v.90.st.k [kN]
TTUFS4.5X50 PT	2.59	1.66	1.66	2.22	2.22
TTUFS5.0X70	2.64	2.06	2.06	2.64	2.64
TTUFS5.0X80	2.64	2.06	2.06	2.64	2.64
TTUFS5.0X90	2.97	2.14	2.14	2.72	2.72
TTUFS5.0X100	3.96	2.39	2.39	2.97	2.97
TTUFS6.0X40	3.51	1.74	1.74	3.05	3.05
TTUFS6.0X50	3.1	2.2	2.2	3.33	3.33
TTUFS6.0X60	3.61	2.66	2.66	3.64	3.64
TTUFS6.0X70	4.13	2.96	2.96	3.76	3.76
TTUFS6.0X80	4.13	2.96	2.96	3.76	3.76
TTUFS6.0X90	4.64	3.09	3.09	3.89	3.89
TTUFS6.0X100	6.19	3.48	3.48	4.28	4.28
TTUFS6.0X120	7.22	3.74	3.74	4.54	4.54
TTUFS6.0X140	7.22	3.74	3.74	4.54	4.54
TTUFS6.0X160	7.22	3.74	3.74	4.54	4.54
TTUFS6.0X180	7.22	3.74	3.74	4.54	4.54

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 R_v.0°.k
Load axis at 90° from timber grain R_v.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 a_4,c [mm]	Shear capacity depending of thickness of ledger t₁ [Rv.90-0.k] [kN]
	Minimum width of the stud [mm]		35 [mm]	40 [mm]	45 [mm]	60 [mm]	75 [mm]	80 [mm]	90 [mm]	≥100 [mm]
TTUFS4.5X50 PT	-	-	-	-	-	-	-	-	-	-
TTUFS5.0X70	30	15	1.81	-	-	-	-	-	-	-
TTUFS5.0X80	30	15	1.81	1.81	1.81	-	-	-	-	-
TTUFS5.0X90	30	15	1.81	1.81	1.81	-	-	-	-	-
TTUFS5.0X100	30	15	1.81	1.81	1.81	-	-	-	-	-
TTUFS6.0X40	36	18	-	-	-	-	-	-	-	-
TTUFS6.0X50	36	18	-	-	-	-	-	-	-	-
TTUFS6.0X60	36	18	-	-	-	-	-	-	-	-
TTUFS6.0X70	36	18	2.44	-	-	-	-	-	-	-
TTUFS6.0X80	36	18	2.62	2.6	2.44	-	-	-	-	-
TTUFS6.0X90	36	18	2.62	2.62	2.62	-	-	-	-	-
TTUFS6.0X100	36	18	2.62	2.62	2.62	-	-	-	-	-
TTUFS6.0X120	36	18	2.62	2.62	2.62	-	-	-	-	-
TTUFS6.0X140	36	18	2.62	2.62	2.62	2.62	2.62	-	-	-
TTUFS6.0X160	36	18	2.62	2.62	2.62	2.62	2.62	2.62	2.62	-
TTUFS6.0X180	36	18	2.62	2.62	2.62	2.62	2.62	2.62	2.62	2.62

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

Panel to Timber characteristic capacities

References	Panel (OSB, Fibreboard ρ_k≥380 kg/m³) on Timber C24 depending on panel thickness t_p
	13 [mm]			15 [mm]			18 [mm]			22 [mm]			25 [mm]
	R_ax.k.13 [kN]	R_v.0.k.13 [kN]	R_v.90.k.13 [kN]	R_ax.k.15 [kN]	R_v.0.k.15 [kN]	R_v.90.k.15 [kN]	R_ax.k.18 [kN]	R_v.0.k.18 [kN]	R_v.90.k.18 [kN]	R_ax.k.22 [kN]	R_v.0.k.22 [kN]	R_v.90.k.22 [kN]	R_ax.k.25 [kN]	R_v.0.k.25 [kN]	R_v.90.k.25 [kN]
TTUFS4.5X50 PT	0.56	0.84	0.84	0.56	0.88	0.88	0.56	0.94	0.94	0.71	1.06	1.06	0.71	1.06	1.06
TTUFS5.0X70	0.72	1.03	1.03	0.72	1.06	1.06	0.72	1.11	1.11	0.9	1.24	1.24	0.9	1.31	1.31
TTUFS5.0X80	0.72	1.03	1.03	0.72	1.06	1.06	0.72	1.11	1.11	0.9	1.24	1.24	0.9	1.31	1.31
TTUFS5.0X90	0.72	1.03	1.03	0.72	1.06	1.06	0.72	1.11	1.11	0.9	1.24	1.24	0.9	1.31	1.31
TTUFS5.0X100	0.72	1.03	1.03	0.72	1.06	1.06	0.72	1.11	1.11	0.9	1.24	1.24	0.9	1.31	1.31
TTUFS6.0X40	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
TTUFS6.0X50	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
TTUFS6.0X60	1.08	1.31	1.31	1.08	1.36	1.36	1.08	1.41	1.41	1.35	1.56	1.56	1.35	1.64	1.64
TTUFS6.0X70	1.08	1.31	1.31	1.08	1.36	1.36	1.08	1.41	1.41	1.35	1.56	1.56	1.35	1.64	1.64
TTUFS6.0X80	1.08	1.31	1.31	1.08	1.36	1.36	1.08	1.41	1.41	1.35	1.56	1.56	1.35	1.64	1.64
TTUFS6.0X90	1.08	1.31	1.31	1.08	1.36	1.36	1.08	1.41	1.41	1.35	1.56	1.56	1.35	1.64	1.64
TTUFS6.0X100	1.08	1.31	1.31	1.08	1.36	1.36	1.08	1.41	1.41	1.35	1.56	1.56	1.35	1.64	1.64
TTUFS6.0X120	1.08	1.31	1.31	1.08	1.36	1.36	1.08	1.41	1.41	1.35	1.56	1.56	1.35	1.64	1.64
TTUFS6.0X140	1.08	1.31	1.31	1.08	1.36	1.36	1.08	1.41	1.41	1.35	1.56	1.56	1.35	1.64	1.64
TTUFS6.0X160	1.08	1.31	1.31	1.08	1.36	1.36	1.08	1.41	1.41	1.35	1.56	1.56	1.35	1.64	1.64
TTUFS6.0X180	1.08	1.31	1.31	1.08	1.36	1.36	1.08	1.41	1.41	1.35	1.56	1.56	1.35	1.64	1.64

Plywood to Timber Characteristic Capacities

References	Plywood (ρ_k≥490 kg/m³) on Timber C24 depending on panel thickness t_p
	10 [mm]			15 [mm]			18 [mm]			22 [mm]			25 [mm]			30 [mm]
	R_ax.k.10 [kN]	R_v.0.k.10 [kN]	R_v.90.k.10 [kN]	R_ax.k.15 [kN]	R_v.0.k.15 [kN]	R_v.90.k.15 [kN]	R_ax.k.18 [kN]	R_v.0.k.18 [kN]	R_v.90.k.18 [kN]	R_ax.k.22 [kN]	R_v.0.k.22 [kN]	R_v.90.k.22 [kN]	R_ax.k.25 [kN]	R_v.0.k.25 [kN]	R_v.90.k.25 [kN]	R_ax.k.30 [kN]	R_v.0.k.30 [kN]	R_v.90.k.30 [kN]
TTUFS4.5X50 PT	0.69	0.94	0.94	0.69	1.01	1.01	0.69	1.08	1.08	1.64	1.41	1.41	1.64	1.37	1.37	-	-	-
TTUFS5.0X70	0.88	1.14	1.14	0.88	1.2	1.2	0.88	1.28	1.28	2.07	1.59	1.59	1.88	1.56	1.78	-	-	-
TTUFS5.0X80	0.88	1.14	1.14	0.88	1.2	1.2	0.88	1.28	1.28	2.07	1.59	1.59	1.88	1.56	1.78	-	-	-
TTUFS5.0X90	0.88	1.14	1.14	0.88	1.2	1.2	0.88	1.28	1.28	2.07	1.59	1.59	1.88	1.56	1.78	-	-	-
TTUFS5.0X100	0.88	1.14	1.14	0.88	1.2	1.2	0.88	1.28	1.28	2.07	1.59	1.59	1.88	1.56	1.78	-	-	-
TTUFS6.0X40	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
TTUFS6.0X50	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
TTUFS6.0X60	1.32	1.48	1.48	1.32	1.53	1.53	1.32	1.61	1.61	2.63	2.05	2.05	2.63	2.11	2.11	-	-	-
TTUFS6.0X70	1.32	1.48	1.48	1.32	1.53	1.53	1.32	1.61	1.61	3	2.15	2.15	3	2.25	2.25	-	-	-
TTUFS6.0X80	1.32	1.48	1.48	1.32	1.53	1.53	1.32	1.61	1.61	3.1	2.17	2.17	3.1	2.27	2.27	-	-	-
TTUFS6.0X90	1.32	1.48	1.48	1.32	1.53	1.53	1.32	1.61	1.61	3.1	2.17	2.17	3.1	2.27	2.27	-	-	-
TTUFS6.0X100	1.32	1.48	1.48	1.32	1.53	1.53	1.32	1.61	1.61	3.1	2.17	2.17	3.1	2.27	2.27	-	-	-
TTUFS6.0X120	1.32	1.48	1.48	1.32	1.53	1.53	1.32	1.61	1.61	3.1	2.17	2.17	3.1	2.27	2.27	-	-	-
TTUFS6.0X140	1.32	1.48	1.48	1.32	1.53	1.53	1.32	1.61	1.61	3.1	2.17	2.17	3.1	2.27	2.27	-	-	-
TTUFS6.0X160	1.32	1.48	1.48	1.32	1.53	1.53	1.32	1.61	1.61	3.1	2.17	2.17	3.1	2.27	2.27	-	-	-
TTUFS6.0X180	1.32	1.48	1.48	1.32	1.53	1.53	1.32	1.61	1.61	3.1	2.17	2.17	3.1	2.27	2.27	-	-	-