Zinc and yellow passivated through bolts for fixing into masonry and concrete. Quick to install and sized from M6 to M20. Suited to racking, handrails, brackets, machinery and seating. A tidy, economical way to get a solid fixing without any fuss.
Available options and pricing for Through Bolts - ZYP, with quantity selectors and a running total
Size
QTY
SKU
Price
QTY
Total
m8 x 50
100
10TB850
£11.76£14.11
—
m8 x 75
100
10TB875
£15.12£18.14
—
m8 x 95
100
10TB895
£16.68£20.02
—
m8 x 115
100
10TB8115
£23.88£28.66
—
m8 x 130
100
10TB8130
£25.08£30.10
—
m10 x 60
100
10TB1060
£19.08£22.90
—
m10 x 80
100
10TB1080
£21.48£25.78
—
m10 x 100
100
10TB10100
£23.88£28.66
—
m10 x 120
100
10TB10120
£26.64£31.97
—
m12 x 80
50
10TB1280
£13.92£16.70
—
m12 x 100
50
10TB12100
£16.68£20.02
—
m12 x 120
50
10TB12120
£18.48£22.18
—
m12 x 140
50
10TB12140
£20.28£24.34
—
m12 x 180
50
10TB12180
£23.76£28.51
—
m16 x 90
50
10TB1690
£24.96£29.95
—
m16 x 105
50
10TB16105
£27.36£32.83
—
m16 x 125
50
10TB16125
£30.48£36.58
—
m16 x 150
50
10TB16150
£35.52£42.62
—
m16 x 180
50
10TB16180
£40.20£48.24
—
m20 x 130
50
10TB20130
£47.40£56.88
—
m20 x 160
50
10TB20160
£59.52£71.42
—
m20 x 220
50
10TB20220
£75.36£90.43
—
ZYP through bolts are a bolt projection holding down fixing, and they do exactly what that sounds like. You drill the hole, drop the bolt in, tighten it up and the expanding sleeve grips the base material. No resin, no waiting about, no drama. The zinc and yellow passivated finish gives you a decent layer of corrosion protection for general indoor and sheltered use.
If you have ever tried to hang a heavy bracket off a wall using something that looked brave on the packet, you will appreciate a proper through bolt. These are sized from M6 up to M20, with lengths running from 50mm right through to 220mm, so there is a fair chance the exact size you need is in the range somewhere.
Where ZYP Through Bolts Get Used
The honest answer is anywhere you need something fixed firmly to concrete or solid masonry. Pallet racking is a big one, and so are handrails, steel brackets, machinery bases, seating and barriers. Shopfitters use them. Warehouse installers use them by the hundred. Anyone bolting a steel frame to a slab will have a few boxes knocking about in the van.
The projecting bolt design means the thread sits proud of the surface once it is set. That makes it easy to slip your fixture straight over the bolt, add a washer and nut, and torque it down. Speed is the real selling point here. Hole, bolt, spanner, done.
Choosing the Right Size
Pick the diameter based on the load and the thickness of whatever you are fixing. Pick the length so that you get proper embedment into the base material plus the fixture thickness plus washer and nut, with a thread or two showing at the end. Going too short is the classic mistake, and it never ends well. Always check the manufacturer’s embedment depth for your chosen size before you start drilling.
The M16 and M20 sizes are the heavy hitters for structural steelwork and racking uprights, while M8 and M10 handle lighter brackets and general fabrication. The M12 sits in the middle and probably gets the most use across the board.
ZYP Through Bolts in Bulk
These come in boxes of 50 or 100 depending on the size, which suits anyone fitting out a full racking run or fixing off a long handrail. Buying by the box keeps the cost per bolt down, and you will not need to nip back to the merchant halfway through the job. Bolts always run out at the worst possible moment, usually when the last upright is the one you cannot move.
The zinc and yellow passivated coating is fine for dry internal conditions and sheltered locations. If you are fixing outside in full weather, or somewhere with constant damp or chemical exposure, consider stainless steel instead. Zinc plating buys you time, not immortality.
Pro Tip: Blow the dust out of the drilled hole properly before inserting the bolt, because a hole full of brick dust is the quickest way to lose holding strength.
ZYP through bolts are used wherever a heavy fixture needs anchoring to solid concrete or masonry. Racking installers, shopfitters, steel erectors and general fabricators rely on them for pallet racking uprights, handrails, brackets, machinery bases, barriers and fixed seating. The smaller M6 and M8 sizes suit lighter brackets and fittings, while the M16 and M20 sizes tackle structural steel baseplates and heavy industrial work.
Best For
Pallet racking
Handrails and barriers
Steel brackets
Machinery bases
Fixed seating
Structural baseplates
Compatible Surfaces
Solid concrete
Solid brick
Dense blockwork
Natural stone
Key Properties
Zinc and yellow passivated finish
Through-fixing design
Expanding sleeve grip
Sizes M6 to M20
Quick to install
Boxes of 50 or 100
Not suitable for: Not recommended for hollow blocks, aerated concrete or soft plasterboard, where the sleeve cannot expand and grip properly. The zinc finish also is not ideal for permanent outdoor or heavily corrosive environments.
Drill a hole to the diameter and depth specified for your chosen bolt size, using a hammer drill with a masonry bit. Clean the hole thoroughly, then fit the bolt through your fixture and tap it into the hole until the washer sits flush. Tighten the nut to the recommended torque, which expands the sleeve and locks the bolt in place.
Edge distance and spacing between fixings matter more than most people think. Placing bolts too close to an edge or to each other can crack the base material and reduce load capacity.
Mark your fixing position through the hole in the fixture or baseplate.
Select a masonry drill bit matching the bolt diameter and set the depth to suit the bolt length and required embedment.
Drill the hole using a hammer drill, keeping the bit square to the surface.
Clear dust and debris from the hole with a brush and blower or hand pump.
Position the fixture and insert the bolt through it, tapping gently with a hammer until the washer is flush.
Tighten the nut to the recommended torque to expand the sleeve and set the fixing.
What is the difference between a through bolt and a standard wall plug?
A through bolt uses an expanding sleeve that grips the base material as you tighten the nut, giving a much higher load capacity than a standard plug. It is designed for heavier fixtures like racking, machinery and handrails where a plug would simply not cope.
Can I use ZYP through bolts outside?
The zinc and yellow passivated finish offers good protection for internal and sheltered use. For fully exposed outdoor locations or constant damp, a stainless steel through bolt is a better choice as zinc will eventually corrode in harsh conditions.
How do I choose the right bolt length?
Add together the required embedment depth in the base material, the thickness of your fixture, the washer and the nut height. The bolt should leave a couple of threads showing beyond the nut once fully tightened. Always check the embedment depth for your chosen diameter before drilling.
These through bolts are manufactured from steel with a zinc plated and yellow passivated finish for corrosion resistance in dry and sheltered conditions. The expanding sleeve design provides a mechanical grip in solid concrete and masonry as the nut is tightened. Available in diameters from M6 to M20 and lengths from 50mm to 220mm to suit a wide spread of fixing requirements.
Product Type
Through Bolt
Finish
Zinc and Yellow Passivated
Diameter Range
M6 to M20
Length Range
50mm to 220mm
Fixing Type
Expanding sleeve, projecting bolt
Box Quantity
50 or 100 depending on size
Weight
N/A
Size
m10 x 100, m10 x 120, m10 x 60, m10 x 80, m12 x 100, m12 x 120, m12 x 140, m12 x 180, m12 x 80, m16 x 105, m16 x 125, m16 x 150, m16 x 180, m16 x 220, m16 x 90, m20 x 130, m20 x 160, m20 x 220, m6 x 55, m8 x 115, m8 x 130, m8 x 50, m8 x 75, m8 x 95
Box Quantity
100, 50
Product Type
Through Bolts
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