Fasteners

CLT connection

Screws

Structural screws for CLT

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.

Technical Data Sheet

CE Marking

ETA

Service class 1

Indoor

EPD

Electro-galvanized steel

Fastener Designer

Product Details

Images

Features

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

Application

Suitable For

Wood to wood.

Technical Data

Product Dimensions

Dimensions

Reference	Fasteners Dimensions[mm]
	Item Code	Other			Product information[mm]
	Item Code	NOB nr.	Tun / DB nr.	Weight[kg]	d[mm]	l[mm]	dh[mm]	d1[mm]	Thread Length[mm]	Driver Bit[mm]
TTUFS4.0X40 FT	74429	53293966	1949924	0.002	4	40	8	2.5	35	T-20
TTUFS4.0X45 PT	74430	53293974	1949925	0.002	4	45	8	2.5	29	T-20
TTUFS4.0X50 PT	74431	53293985	1949926	0.003	4	50	8	2.5	30	T-20
TTUFS4.0X60 PT	74432	53293993	1949927	0.003	4	60	8	2.5	35	T-20
TTUFS4.0X70	74433	53294004	1949928	0.004	4	70	8	2.5	40	T-20
TTUFS4.5X25	74434	53294012	1949929	0.002	4.5	25	8.4	2.8	20	T-20
TTUFS4.5X30	74435	53294023	1949930	0.002	4.5	30	8.4	2.8	25	T-20
TTUFS4.5X35 FT	74436	53294038	1949931	0.002	4.5	35	8.4	2.8	30	T-20
TTUFS4.5X40 FT	74437	53294042	1949932	0.003	4.5	40	8.4	2.8	35	T-20
TTUFS4.5X45 PT	74438	53294057	1949933	0.003	4.5	45	8.4	2.8	29	T-20
TTUFS4.5X50 PT	74439	53294061	1949935	0.003	4.5	50	8.4	2.8	30	T-20
TTUFS4.5X60 PT	74440	53294076	1949936	0.004	4.5	60	8.4	2.8	35	T-20
TTUFS4.5X70	74441	53294080	1949937	0.005	4.5	70	8.4	2.8	40	T-20
TTUFS4.5X80	74442	53294095	1949938	0.005	4.5	80	8.4	2.8	50	T-20
TTUFS5.0X40 FT	74374	53294133	1949942	0.003	5	40	9.5	3.1	35	T-25
TTUFS5.0X50 PT	74375	53294144	1949943	0.004	5	50	9.5	3.1	30	T-25
TTUFS5.0X60 PT	74376	53294152	1949944	0.005	5	60	9.5	3.1	35	T-25
TTUFS5.0X70	74377	53294163	1949945	0.006	5	70	9.5	3.1	40	T-25
TTUFS5.0X80	74378	53294178	1949946	0.006	5	80	9.5	3.1	40	T-25
TTUFS5.0X90	74379	53294182	1949947	0.007	5	90	9.5	3.1	45	T-25
TTUFS5.0X100	74443	53294106	1949939	0.008	5	100	9.5	3.1	60	T-25
TTUFS5.0X120	74372	53294114	1949940	0.009	5	120	9.5	3.1	60	T-25
TTUFS6.0X60	74458	53294265	1949955	0.007	6	60	11.6	3.7	35	T-30
TTUFS6.0X70	74459	53294273	1949956	0.008	6	70	11.6	3.7	40	T-30
TTUFS6.0X80	74460	53294284	1949957	0.01	6	80	11.6	3.7	40	T-30
TTUFS6.0X90	74461	53294292	1949958	0.011	6	90	11.6	3.7	45	T-30
TTUFS6.0X100	74380	53294197	1949948	0.012	6	100	11.6	3.7	60	T-30
TTUFS6.0X120	74451	53294201	1949949	0.015	6	120	11.6	3.7	70	T-30
TTUFS6.0X140	74452	53294216	1949950	0.016	6	140	11.6	3.7	70	T-30
TTUFS6.0X160	74453	53294220	1949951	0.018	6	160	11.6	3.7	70	T-30
TTUFS6.0X180	74454	53294235	1949952	0.021	6	180	11.6	3.7	70	T-30

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

Reference	Screw Parameters
	Characteristic parameters
	Characteristic Yield Moment – My,ₖ[Nm]	Characteristic withdrawal parameter - fₐₓ,ₖ,₉₀°[N/mm²]	Characteristic head pull-through parameter - fₕₑₐd,ₖ[N/mm²]	Characteristic tensile capacity - fₜₑₙₛ,ₖ[kN]
TTUFS4.5X25	4660	14.7	15.6	7.8
TTUFS4.5X30	4660	14.7	15.6	7.8
TTUFS4.5X35 FT	4660	14.7	15.6	7.8
TTUFS4.5X40 FT	4660	14.7	15.6	7.8
TTUFS4.5X45 PT	4660	14.7	15.6	7.8
TTUFS4.5X50 PT	4660	14.7	15.6	7.8
TTUFS4.5X60 PT	4660	14.7	15.6	7.8
TTUFS4.5X70	4660	14.7	15.6	7.8
TTUFS4.5X80	4660	14.7	15.6	7.8
TTUFS5.0X40 FT	6720	15	17.1	7.9
TTUFS5.0X50 PT	6720	15	17.1	7.9
TTUFS5.0X60 PT	6720	15	17.1	7.9
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
TTUFS5.0X120	6720	15	17.1	7.9
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

Certification

Declaration of Performance (DoP)

uk-dop-e21-0670-02-s-2.pdf

Show history

2022-08-26

uk-dop-e21-0670.pdf

European Technical Assessment (ETA)

eta-21-0670-2025-10-17.pdf

Show history

2021-12-09

eta210670-2021-12-09-cor-1.pdf

Environmental Product Declarations (EPD)

epd-certificate-sst-screws

CAD and BIM Library

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Product Details

Images

Features

Features

Application

Suitable For

Technical Data

Product Dimensions

Dimensions

Product characteristic properties

Certification

Declaration of Performance (DoP)

European Technical Assessment (ETA)

Environmental Product Declarations (EPD)

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TTUFS5.0X40 FT

TTUFS5.0X90

TTUFS6.0X90

TTUFS6.0X180

TTUFS5.0X100

TTUFS4.5X35 FT

TTUFS5.0X50 PT

TTUFS4.5X70

TTUFS5.0X70

TTUFS4.5X40 FT

TTUFS4.5X45 PT

TTUFS6.0X60

TTUFS6.0X100

TTUFS6.0X120

TTUFS6.0X80

TTUFS6.0X140

TTUFS4.5X80

TTUFS5.0X80

TTUFS6.0X70

TTUFS4.5X60 PT

TTUFS5.0X120

TTUFS6.0X160

TTUFS4.5X30

TTUFS5.0X60 PT

TTUFS4.5X50 PT

TTUFS4.5X25

TTUFS5.0X40 FT

TTUFS5.0X90

TTUFS6.0X90

TTUFS6.0X180

TTUFS5.0X100

TTUFS4.5X35 FT

TTUFS5.0X50 PT

TTUFS4.5X70

TTUFS5.0X70

TTUFS4.5X40 FT

TTUFS4.5X45 PT

TTUFS6.0X60

TTUFS6.0X100

TTUFS6.0X120

TTUFS6.0X80

TTUFS6.0X140

TTUFS4.5X80

TTUFS5.0X80

TTUFS6.0X70

TTUFS4.5X60 PT

TTUFS5.0X120

TTUFS6.0X160

TTUFS4.5X30

TTUFS5.0X60 PT

TTUFS4.5X50 PT

TTUFS4.5X25

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3D/3D Simplified

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