304 (A2) · 316 (A4) · Carbon Steel · Class 8.8

Sleeve Anchors (Dynabolt-Style)

Sleeve anchors (Dynabolt-style) for light to medium duty fixing to solid concrete: brackets, handrails, posts and timber plates.

About the Sleeve Anchors (Dynabolt-Style)

Sleeve anchors, often called dynabolts, are the everyday bolts for fixing things to solid concrete, like brackets, handrails, gate posts and timber plates: you drill, tap the anchor through the fixture and tighten it so the sleeve grips the hole. They come as Tygabolt sleeve anchors in zinc yellow, mechanical galvanised or 316 stainless, with a hex nut, flush, countersunk, dome, mushroom or eye head, plus security sleeve anchors. Choose the head, finish and size above; the guide below covers sizes, installation and when to use something else.

Also called Dynabolt-style anchors or masonry bolts.

Features

Full-length expansion sleeve
For solid concrete
Standard, flush, countersunk and eye heads
Zinc, galvanised and stainless

Applications

Brackets, gate posts and fixtures to solid concrete
Handrails and balustrade brackets
Timber plates and frames to slabs
Formwork supports

How sleeve anchors work

A sleeve anchor is a fully assembled, one-piece anchor. You drill a hole, tap the anchor in through the fixture, then tighten the nut: this draws a cone up into the sleeve, expanding it against the side of the hole. Claws on the sleeve stop it spinning while you tighten, and it can be loaded straight away.

Sleeve anchors are for solid concrete, for light to medium duty fixings such as handrails, formwork supports, and mechanical, electrical and pipe brackets.

Sleeve anchor sizes and installation

Sleeve anchors are sized by the hole they go in, so the anchor size is also your drill size. A 10mm sleeve anchor goes in a 10mm hole and has an M8 thread.

Tygabolt zinc yellow hex nut sleeve anchors: installation values from their data sheet. Other heads and finishes have their own data sheets. Tap a number to show it in the selector above.

Anchor (drill) size	Thread	Min. hole depth	Fixture hole	Tightening torque	Min. edge distance	Min. spacing	Min. concrete thickness
6.5mm	M5	25mm	8mm	5Nm	50mm	50mm	75mm
8mm	M6	40mm	10mm	8Nm	50mm	50mm	100mm
10mm	M8	50mm	12mm	25Nm	60mm	60mm	100mm
12mm	M10	60mm	14mm	40Nm	75mm	75mm	100mm
16mm	M12	70mm	18mm	50Nm	100mm	100mm	125mm
20mm	M16	80mm	22mm	80Nm	120mm	120mm	150mm

Head types and finishes

Hex nut: the standard sleeve anchor, for brackets and plates.
Flush and countersunk head: sit level with the fixture surface.
Dome and mushroom head: a neat, rounded head. The mushroom head security anchor uses a Torx drive and an anti-tamper plug, and is ETA approved (Option 7) for non-cracked concrete.
Eye: an eye on top for wire and light ties; Hobson publishes no rating for it, so it is not for anchoring people or loads: use a rated anchor point.
Zinc yellow for indoor use, mechanical galvanised for more exposure, 316 stainless for wet and coastal areas.

Installing a sleeve anchor

Drill a hole the same diameter as the anchor, at least the minimum depth in the table.
Blow and brush the dust out of the hole.
Push or tap the anchor through the fixture into the hole until the washer sits on the fixture.
Tighten the nut to the torque in the table. Do not overtighten.
Keep to the minimum edge and spacing distances, and the minimum concrete thickness, so the concrete does not crack.

1. Drill through the fixture

Hole in the concrete = anchor size; fixture hole a little larger

2. Tap the anchor in

Washer on the fixture

3. Tighten the nut

The cone expands the sleeve

Fixing into brick or hollow block?

Our sleeve anchors are made for solid concrete. For brick and block, use TX-CON masonry screws for light to medium duty, or a chemical anchor with a mesh sleeve for hollow masonry and heavier loads.

Sleeve anchors in Adelaide

Allmat supplies sleeve anchors, concrete screws, through bolts and chemical 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.

Sleeve anchors for concrete and masonry

Sleeve anchors, concrete screws, through bolts and chemical anchors are available to order from Allmat for builders, 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

Is a sleeve anchor the same as a dynabolt?

Yes, dynabolt is a common name for a sleeve anchor: a one-piece anchor whose sleeve expands in the hole as the nut is tightened.

What size drill for a sleeve anchor?

The same as the anchor size: a 10mm sleeve anchor needs a 10mm hole. A 10mm anchor has an M8 thread, 12mm has M10, and 16mm has M12. Dynabolt sizes get quoted both ways, so an M10 dynabolt (12mm hole) is bigger than a 10mm one (M8 thread).

Can I use sleeve anchors in brick?

Our sleeve anchors are for solid concrete. For brick and block, use TX-CON masonry screws or a chemical anchor with a mesh sleeve.

How tight should a sleeve anchor be?

Tighten to the installation torque for its size, for example 25Nm for a 10mm (M8) anchor and 40Nm for a 12mm (M10) anchor. Overtightening can crack the concrete.

Sleeve anchor or concrete screw?

Both suit solid concrete. Concrete screws allow closer edge and spacing distances and can be removed; sleeve anchors are quick to fit through the fixture and can be loaded straight away.

Where can I buy sleeve anchors 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.

Sleeve Anchors (Dynabolt-Style): sizes and finishes we supply

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

Head / type	Finish	Sizes	Lengths	Lines
Standard	Zinc Yellow Passivate	M5, M6, M8, M10, M12, M16	25 to 160 (14 lengths)	22
Standard	Mechanical Galvanised	M6, M8, M10, M12, M16	40 to 160 (11 lengths)	18
Flush	Zinc Yellow Passivate	M6, M8, M10, M12	45 to 110 (10 lengths)	13
Standard	316 Stainless	M5, M6, M8, M10	35, 40, 50, 55, 60, 75, 80, 100	11
Countersunk	Zinc Yellow Passivate	M5, M6, M8	35, 55, 60, 75, 85, 100, 120	9
Flush	316 Stainless	M6, M8, M10	45, 60, 70, 75, 90, 95	8
Dome	Zinc Plated	10mm, 12mm	65, 80, 85, 105, 110, 130	6
Mushroom	Zinc Plated	10mm, 12mm	80, 100, 120	6
Countersunk	Zinc Plated	10mm	70, 90, 110	3
Dome	304 Stainless	10mm	65, 85, 105	3
Eye	Zinc Yellow Passivate	M8	45	1

Data sheets and documents

The documents for the product you choose are listed with the selector above. Here is every Sleeve Anchors (Dynabolt-Style) document from Hobson Engineering.

All Sleeve Anchors (Dynabolt-Style) documents (22)

Data sheets and technical data (14)

Approvals (ETA, DoP) (1)

Sleeve Anchor Option 7 - 058

Did You Know flyers (3)

Guides and articles (4)

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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