Fasteners

Connectors for Cross Laminated Timber (CLT) Structures

Screws

Assembly Screws & Nails

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 Dimensions[mm]
	Item Code	Qty per box	Weight[kg]	d[mm]	l[mm]	dh[mm]	d1[mm]	Thread Length[mm]	Driver Bit[mm]	Thread[mm]
TTUFS3.0X16	74414	200.0	0.001	3	16	6	2	11	T-10	FT
TTUFS3.0X20	74415	200.0	0.001	3	20	6	2	15	T-10	FT
TTUFS3.0X25	74416	200.0	0.001	3	25	6	2	20	T-10	FT
TTUFS3.0X30	74417	200.0	0.001	3	30	6	2	25	T-10	FT
TTUFS3.5X16	74418	200.0	0.001	3.5	16	7	2.2	11	T-15	FT
TTUFS3.5X20	74419	200.0	0.001	3.5	20	7	2.2	15	T-15	FT
TTUFS3.5X25	74420	200.0	0.001	3.5	25	7	2.2	20	T-15	FT
TTUFS3.5X30	74421	200.0	0.001	3.5	30	7	2.2	25	T-15	FT
TTUFS3.5X35	74422	200.0	0.002	3.5	35	7	2.2	30	T-15	FT
TTUFS3.5X40	74423	200.0	0.002	3.5	40	7	2.2	35	T-15	FT
TTUFS3.5X50 PT	74424	200.0	0.002	3.5	50	7	2.2	30	T-15	PT
TTUFS4.0X20	74425	200.0	0.001	4	20	8	2.5	15	T-20	FT
TTUFS4.0X25	74426	200.0	0.002	4	25	8	2.5	20	T-20	FT
TTUFS4.0X30 FT	74427	200.0	0.002	4	30	8	2.5	25	T-20	FT
TTUFS4.0X35	74428	200.0	0.002	4	35	8	2.5	30	T-20	FT
TTUFS4.0X40 FT	74429	200.0	0.002	4	40	8	2.5	35	T-20	FT
TTUFS4.0X45 PT	74430	200.0	0.002	4	45	8	2.5	29	T-20	PT
TTUFS4.0X50 PT	74431	200.0	0.003	4	50	8	2.5	30	T-20	PT
TTUFS4.0X60 PT	74432	200.0	0.003	4	60	8	2.5	35	T-20	PT
TTUFS4.0X70	74433	200.0	0.004	4	70	8	2.5	40	T-20	PT
TTUFS4.5X25	74434	200.0	0.002	4.5	25	8.4	2.8	20	T-20	FT
TTUFS4.5X30	74435	200.0	0.002	4.5	30	8.4	2.8	25	T-20	FT
TTUFS4.5X35 FT	74436	200.0	0.002	4.5	35	8.4	2.8	30	T-20	FT
TTUFS4.5X40 FT	74437	200.0	0.003	4.5	40	8.4	2.8	35	T-20	FT
TTUFS4.5X45 PT	74438	200.0	0.003	4.5	45	8.4	2.8	29	T-20	PT
TTUFS4.5X50 PT	74439	200.0	0.003	4.5	50	8.4	2.8	30	T-20	PT
TTUFS4.5X60 PT	74440	200.0	0.004	4.5	60	8.4	2.8	35	T-20	PT
TTUFS4.5X70	74441	100.0	0.005	4.5	70	8.4	2.8	40	T-20	PT
TTUFS4.5X80	74442	100.0	0.005	4.5	80	8.4	2.8	50	T-20	PTM
TTUFS5.0X30	74373	200.0	0.003	5	30	9.5	3.1	25	T-25	FT
TTUFS5.0X40 FT	74374	200.0	0.003	5	40	9.5	3.1	35	T-25	FT
TTUFS5.0X50 PT	74375	200.0	0.004	5	50	9.5	3.1	30	T-25	PT
TTUFS5.0X60 PT	74376	200.0	0.005	5	60	9.5	3.1	35	T-25	PT
TTUFS5.0X70	74377	100.0	0.006	5	70	9.5	3.1	40	T-25	FT
TTUFS5.0X80	74378	100.0	0.006	5	80	9.5	3.1	40	T-25	PTM
TTUFS5.0X90	74379	100.0	0.007	5	90	9.5	3.1	45	T-25	PTM
TTUFS5.0X100	74443	100.0	0.008	5	100	9.5	3.1	60	T-25	PTM
TTUFS5.0X120	74372	100.0	0.009	5	120	9.5	3.1	60	T-25	PTM
TTUFS6.0X40	74455	200.0	0.005	6	40	11.6	3.7	34	T-30	FT
TTUFS6.0X50	74457	200.0	0.006	6	50	11.6	3.7	30	T-30	PT
TTUFS6.0X60	74458	200.0	0.007	6	60	11.6	3.7	35	T-30	PT
TTUFS6.0X70	74459	100.0	0.008	6	70	11.6	3.7	40	T-30	PT
TTUFS6.0X80	74460	100.0	0.01	6	80	11.6	3.7	40	T-30	PTM
TTUFS6.0X90	74461	100.0	0.011	6	90	11.6	3.7	45	T-30	PTM
TTUFS6.0X100	74380	100.0	0.012	6	100	11.6	3.7	60	T-30	PTM
TTUFS6.0X120	74451	100.0	0.015	6	120	11.6	3.7	70	T-30	PTM
TTUFS6.0X140	74452	100.0	0.016	6	140	11.6	3.7	70	T-30	PTM
TTUFS6.0X160	74453	100.0	0.018	6	160	11.6	3.7	70	T-30	PTM
TTUFS6.0X180	74454	100.0	0.021	6	180	11.6	3.7	70	T-30	PTM

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
TTUFS5.0X30	6720	15	17.1	7.9
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
TTUFS6.0X40	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

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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TTUFS6.0X180

TTUFS6.0X50

TTUFS4.5X35 FT

TTUFS4.5X60 PT

TTUFS5.0X120

TTUFS6.0X90

TTUFS4.5X50 PT

TTUFS5.0X40 FT

TTUFS4.5X40 FT

TTUFS4.5X45 PT

TTUFS6.0X60

TTUFS6.0X100

TTUFS4.5X70

TTUFS6.0X120

TTUFS5.0X70

TTUFS6.0X80

TTUFS6.0X140

TTUFS4.5X80

TTUFS5.0X80

TTUFS6.0X70

TTUFS5.0X30

TTUFS6.0X40

TTUFS6.0X160

TTUFS4.5X30

TTUFS5.0X60 PT

TTUFS4.5X25

TTUFS5.0X90

TTUFS5.0X100

TTUFS5.0X50 PT

TTUFS6.0X180

TTUFS6.0X50

TTUFS4.5X35 FT

TTUFS4.5X60 PT

TTUFS5.0X120

TTUFS6.0X90

TTUFS4.5X50 PT

TTUFS5.0X40 FT

TTUFS4.5X40 FT

TTUFS4.5X45 PT

TTUFS6.0X60

TTUFS6.0X100

TTUFS4.5X70

TTUFS6.0X120

TTUFS5.0X70

TTUFS6.0X80

TTUFS6.0X140

TTUFS4.5X80

TTUFS5.0X80

TTUFS6.0X70

TTUFS5.0X30

TTUFS6.0X40

TTUFS6.0X160

TTUFS4.5X30

TTUFS5.0X60 PT

TTUFS4.5X25