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]
TTUFS4.5X50 PT	74439	200.0	0.003	4.5	50	8.4	2.8	30	T-20	PT
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
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]
TTUFS4.5X50 PT	4660	14.7	15.6	7.8
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
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

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

ZIP Packages

2D
2D DWG ZIP DXF ZIP PDF ZIP

3D/3D Simplified
IFC ZIP SAT ZIP SKP ZIP STL ZIP

Select one of our Websites

Connectors

Fasteners

Anchors & fixings

Others

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)

Related Products

Multi Angle Bracket

End Grain Connector Light

TTUFS6.0X120

TTUFS6.0X140

TTUFS6.0X40

TTUFS6.0X70

TTUFS5.0X90

TTUFS4.5X50 PT

TTUFS5.0X50 PT

TTUFS5.0X60 PT

TTUFS6.0X50

TTUFS6.0X60

TTUFS6.0X80

TTUFS5.0X80

TTUFS6.0X160

TTUFS6.0X180

TTUFS5.0X100

TTUFS6.0X90

TTUFS6.0X100

TTUFS5.0X70

TTUFS6.0X120

TTUFS6.0X140

TTUFS6.0X40

TTUFS6.0X70

TTUFS5.0X90

TTUFS4.5X50 PT

TTUFS5.0X50 PT

TTUFS5.0X60 PT

TTUFS6.0X50

TTUFS6.0X60

TTUFS6.0X80

TTUFS5.0X80

TTUFS6.0X160

TTUFS6.0X180

TTUFS5.0X100

TTUFS6.0X90

TTUFS6.0X100

TTUFS5.0X70

2D

3D/3D Simplified

About Simpson Strong-Tie®

Simpson Strong-Tie U.K.

Phone

Fax

Email

Website

Copyright (en-UK)