316 (A4) · A4-50 · Carbon Steel · Steel

Concrete Screws (Screw Anchors)

Concrete screws (screw bolts) that cut their own thread into a drilled hole in concrete, brick or block, for posts, brackets, plates and handrails, with no plug or nut and fully removable.

About the Concrete Screws (Screw Anchors)

Concrete screws, also called screw anchors or screw bolts, screw straight into a drilled hole in concrete, brick or block and cut their own thread, so there is no plug or nut: they fix posts, brackets, bottom plates, handrails and formwork, and come back out cleanly. They come as XBolt PRO and Mungo MCS screws (approved under AS 5216 for cracked and non-cracked concrete), XBolt screws for general medium to heavy fixing, and TX-CON screws for light to medium duty in brick and block, with hex flange, countersunk, pan, dome, stud, coupler and eye heads, zinc plated, galvanised or 316 stainless. Choose the screw, head and size above; the guide below covers which one to use and how to install it.

Also called screw bolts, masonry screws or screw anchors.

Features

Cuts its own thread in concrete
No expansion sleeve, fully removable
Hex-flange, countersunk, dome, eye, stud heads
Zinc-plated and stainless

Applications

Fixing posts, brackets and handrails to concrete
Bottom plates and ledgers to slabs and masonry walls
Temporary and permanent formwork
Mechanical, electrical and pipe brackets

How concrete screws work

A concrete screw is a one-piece anchor. You drill a hole, then screw the anchor in: its hardened thread taps into the concrete and locks there. There is no expansion sleeve pushing against the hole, so concrete screws can go closer to edges and to each other than expansion anchors, install quickly, and are fully removable.

Common uses are handrails, bottom plates on concrete slabs, formwork supports, mechanical, electrical and pipe brackets, pallet racking, door frames and base plates.

Which screw bolt for concrete?

For brick and block, use TX-CON masonry screws or a chemical anchor with a mesh sleeve. For engineered connections, use an ETA-approved anchor and design to its values.

Range	Base material	Approvals	Suits
XBolt PRO (zinc, R1000, bi-metal 316)	Solid concrete, cracked and non-cracked	ETA Option 1, AS 5216, seismic C1 or C2 on selected sizes, fire resistance in ETA	Engineered and safety critical fixings, medium to heavy loads
MCS and MCSr (316) concrete screws	Cracked and non-cracked concrete	ETA Option 1, fire resistance up to F120 in the approval	Railings, consoles, steelwork, services; three setting depths
XBolt screw anchors (galvanised, zinc yellow)	Concrete	Not ETA assessed	General medium to heavy fixing, M5 to M20
TX-CON (R1000 coated)	Concrete, brick and block	Not ETA assessed	Light to medium duty: door frames, base plates in timber framing

Head types and finishes

Hex flange: the everyday head with a built-in washer, driven with a socket.
Countersunk: sits flush in a countersunk fixture.
Dome (button) head: a low, neat head with a Torx drive.
Stud, coupler and eye: an external thread, internal thread or eye on top, for hanging rod, services and tie points.
Zinc plated and zinc yellow: for dry, indoor use. Mechanical galvanised and R1000 coated: for more exposure. Bi-metal 316 stainless with a heat-treated alloy point: for severe marine, chemical, food and brewery environments.

Installing a concrete screw

Drill the hole to the diameter and depth given for the anchor in its data sheet or ETA.
Clean the dust out of the hole.
Drive the screw through the fixture with a socket or the correct bit until the head seats firmly. Do not keep turning once it is tight.
To remove, simply unscrew it.

1. Drill and clean

Hole to the data sheet size

2. Drive the screw

The hardened thread taps into the concrete

No expansion

Close to edges, and fully removable

Concrete screws in Adelaide

Allmat supplies concrete screws, masonry screws, chemical anchors and mechanical anchors to builders and trade across Adelaide and South Australia. Add them to a quote with the rest of your list, and we will price the lot.

Concrete screws and anchors for the job

Concrete screws, masonry screws, chemical and mechanical anchors are available to order from Allmat for builders, steel fixers, electricians, plumbers and trade across Adelaide and South Australia. Order through Allmat, we pick and pack it, then click and collect from the Allmat yard or have it delivered to site.

Send your list for a quote Call 1300 03 03 63

Goes with

Questions

What is the difference between a concrete screw and a screw bolt?

They are the same thing: a one-piece anchor that taps its own thread into a drilled hole in concrete. Also called a screw anchor.

Can concrete screws be used in brick?

Yes, TX-CON screws are the brick screws in the range, made for light to medium duty fixing into concrete, brick and block. The XBolt PRO range is for solid concrete.

Are concrete screws removable?

Yes. Concrete screws unscrew fully, which makes them handy for temporary works such as formwork supports.

Which concrete screws comply with AS 5216?

XBolt PRO and MCS concrete screws carry ETA Option 1 approval for cracked and non-cracked concrete, which is how they comply with AS 5216.

What concrete screws should I use near the coast?

The bi-metal 316 stainless XBolt PRO or MCSr 316 stainless screws, made for severe marine and chemical environments.

Where can I buy concrete screws in Adelaide?

Order through Allmat. Order ahead by phone on 1300 03 03 63 or send your list for a quote, then click and collect from 25 Kapara Road, Gillman, or have them delivered to site.

Concrete Screws (Screw Anchors): sizes and finishes we supply

275 lines by type and finish. Pick one above for its product code and pack sizes.

Head / type	Finish	Sizes	Lengths	Lines
Hex flange	R1000 Hours Protective Coat	M6, M8, M10, M12, M14	45 to 200 (18 lengths)	45
Hex flange	Zinc Plated	6, M6, 8, 10, 12, 14	40 to 360 (20 lengths)	38
Hex flange	Mechanical Galvanised	M6, M8, M10, M12, M16, M20	30 to 200 (9 lengths)	23
Hex flange	Zinc Yellow Passivate	M5, M6, M8, M10, M12, M16, M20	30, 50, 60, 75, 100, 120, 150, 200	22
MRS-H wall screw (wood)	Zinc Plated	7.5	40 to 270 (16 lengths)	16
MRS-U wall screw (universal)	Zinc Plated	7.5	40 to 270 (16 lengths)	16
Countersunk	Zinc Plated	5, 6, 8, 10	40, 50, 60, 80, 90, 100, 120, 140	12
Countersunk	Mechanical Galvanised	M6, M8, M10, M12	50, 60, 75, 100, 150, 200	12
Countersunk	Zinc Yellow Passivate	M6, M8, M10, M12	50, 60, 75, 100, 150	11
Stud	Zinc Plated	M8, M10, M12	90 to 248 (10 lengths)	10
Countersunk	R1000 Hours Protective Coat	5, 6.5	32, 45, 58, 70, 83, 100	9
Dome	Mechanical Galvanised	M6, M8, M10	60, 65, 75, 100, 150	9
Hex flange	316 Stainless	6, 8, 10	50, 60, 70, 80, 90, 100, 120	7
Hex flange	Bi-Metal 316 Stainless	M6, M8, M10, M12	80, 90, 100, 105, 120, 150	6
Hex	R1000 Hours Protective Coat	6.5	32, 45, 58, 70, 83, 100	6
Pan	Zinc Plated	5, 6	40, 50, 60, 80, 100	6
Countersunk	316 Stainless	6, 8, 10	50, 65, 80, 85, 90, 105	6
Pan	316 Stainless	6	50, 60, 80, 100	4
Dome	Bi-Metal 316 Stainless	M6, M8	80, 90, 100	3
Countersunk	Bi-Metal 316 Stainless	M6, M8	80, 95, 100	3
Eye	Zinc Yellow Passivate	M8, M10, M12	55, 65, 75	3
Internally threaded	R1000 Hours Protective Coat	M10, M12	37, 42	2
Coupler	Mechanical Galvanised	M12	100, 150	2
Coupler	Zinc Yellow Passivate	M12	100, 150	2
Standard	R1000 Hours Protective Coat	7.5	102	1
Eye	Mechanical Galvanised	M16	100	1

Data sheets and documents

The documents for the product you choose are listed with the selector above. Here is every Concrete Screws (Screw Anchors) document from Hobson Engineering.

All Concrete Screws (Screw Anchors) documents (66)

Data sheets and technical data (21)

Standards (1)

AS5216:2018 Compliance

Approvals (ETA, DoP) (19)

Did You Know flyers (14)

Guides and articles (11)

Need them in bulk?

Add the sizes you need to your quote, or send us your list and we’ll price the lot and supply it with the rest of your order.

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