Furniture Fasteners & Screws Guide 2026: Chipboard, Confirmat, Machine Screws, Rivets & Threaded Inserts

A cabinet programme can pass every hinge and slide test and still fail in the field because of a screw. The fastener is the smallest line on the bill of materials and the one that decides whether a joint holds its torque after two heating seasons, whether an installer strips the head on the third unit, or whether a flat-pack box gets returned because three screws were missing. Fasteners are cheap to buy and expensive to get wrong, which is exactly why they deserve a written specification rather than a line that says “screws included”.

This guide covers the fastener families we supply, the four words that prevent most complaints (size, drive, point, coating), how to match a fastener to the substrate, what to inspect on arrival, and how to order fasteners by the project instead of by the piece.

A screw is a system, not a line item

When an importer writes “4 x 40 chipboard screw, zinc” on a purchase order, four separate decisions have been collapsed into one line. Each of them can move cost and failure rate:

• Size — nominal diameter and length, plus the thread form. A 4 mm screw from one factory is not always 4 mm at the shank, and the thread pitch decides how much material it displaces.
• Drive — Phillips, Pozi, Torx or hex socket. Drive decides how the screw behaves when a fitter uses an impact driver at full speed.
• Point and thread — sharp point, type 17 cut point, self-drilling point, or a blunt machine point. The point decides whether you need a pilot hole.
• Material and coating — steel grade plus zinc, black oxide, phosphate, nickel or stainless. Coating decides what the screw survives and what colour it looks like next to your handle finish.

Write all four down and the fastener stops being a commodity. Leave them to the supplier’s default and you inherit whatever was in stock that week.

The fastener families we supply

Chipboard and wood screws

The workhorse of cabinet assembly: countersunk head, coarse single or double thread, sharp or type 17 point. Used for carcass assembly, back panels, hinge plates into particleboard, and general joinery into MDF and plywood. Double-countersunk heads sit flush in soft material and in hardware plates; the coarse thread is designed to cut into low-density board rather than tap a machine thread. Length matters more than diameter here — too short and the screw only grips the outer skin, which is where particleboard has the least strength.

Confirmat and furniture assembly screws

Confirmat screws are the classic tool for butt joints in particleboard: a thick shank, a stepped thread and a wide flat head that pulls two panels together without a separate dowel. They are usually driven with a hex or cross drive into a pre-drilled 5 mm or 7 mm hole, and they can be taken apart and re-assembled a limited number of times. For RTA furniture they are a strong alternative to cam-and-dowel systems where a visible head is acceptable or a cover cap is used.

Machine screws, bolts and hex socket screws

Where a joint is metal-to-metal or metal-to-wood with a nut, insert or threaded plate, machine screws and bolts take over. We supply pan, button, flat and cap heads in M3 to M8, in plain steel, zinc plated and stainless, including hex socket (Allen) cap screws for hardware that will be tightened hard: bracket fixing, rail flanges, heavy slide mounting, and machinery-grade furniture. Hex socket offers the best torque transfer and the least cam-out, which matters wherever an installer is working above their head.

Self-tapping screws for metal and plastic

Self-tapping screws cut their own thread into sheet metal, aluminium profiles or plastic. A self-drilling type with a drill point removes the separate drilling step, which is a real labour saving on site. The trade-off is a narrow window: the screw is specified for a range of sheet thickness, and a point meant for 1.5 mm steel will not behave the same way in 3 mm. Always state the material and thickness, not just the screw size.

Rivets, inserts and threaded hardware

Pop rivets give a permanent, low-profile joint in sheet metal and are common on brackets and enclosures. Threaded inserts — T-nuts, wood inserts and rivet nuts — create a reusable machine thread in wood or thin metal so a panel can be assembled and disassembled without chewing the hole. Inserts are where cheap substitutes show up first; a soft insert that strips on the second assembly turns a premium cabinet into a complaint.

Head, drive and point: the three words that prevent returns

Most screw complaints trace back to a mismatch in one of three places.

Head. Countersunk for flush fixing in wood and hardware plates; pan or button where a slightly proud head is acceptable; flat and cap heads for metal. In thin or soft materials a small head sinks in and looks wrong — a washer or a larger head solves it.

Drive. Phillips is universal and self-centring but cams out under high torque. Pozi looks similar and resists cam-out better with the correct bit. Torx and hex socket deliver the most torque with the least damage, and are worth the extra cent wherever a fitter is using a powered driver. Whatever you choose, specify the bit size in the assembly instructions so installers use the right tool.

Point and thread. Sharp points for softwood and general wood; type 17 cut points for particleboard and MDF; self-drilling points for sheet metal; blunt machine points for nuts and inserts. A screw with the right diameter and the wrong point will either split the board or never bite.

Matching fastener to substrate: MDF, particleboard, plywood, solid wood, steel

The substrate decides the thread, the point and the pilot hole — not the other way round.

• Particleboard and MDF. Coarse thread, type 17 point, pilot hole around 70–80% of the core diameter. These boards have almost no holding strength at the edges, so keep fixings at least 50 mm from an edge and prefer longer screws into the face rather than short screws into the edge.
• Plywood. Holds screws better than particleboard and tolerates a smaller pilot hole. Fine or coarse thread both work; the failure mode is splitting at the edge, so pre-drill near edges.
• Solid wood. Pre-drill in hardwood, especially near an end grain, or the screw will split it. A pilot hole plus a light countersink is standard practice, not extra labour.
• Sheet metal and aluminium profiles. Self-tapping or self-drilling screws sized to the sheet thickness, or machine screws into a rivet nut where the joint will be opened again.
• Plastic. Coarse thread, controlled torque; plastic strips easily, so specify a torque figure for power tools or supply a hand driver.

Coatings: zinc, black oxide, phosphate, stainless and what they survive

Fastener coating is both a corrosion decision and a colour decision, and it should be made together with the finish of the hardware it sits next to.

• Clear (blue-white) zinc — the default economical protection for indoor furniture; good appearance, moderate salt-spray life indoors.
• Yellow zinc — slightly thicker, common for structural and legacy specifications; some markets still associate it with older stock.
• Black oxide and black phosphate — dark, low-sheen, and usually oiled; excellent against galling and good visually with matte black hardware, but not a corrosion strategy on its own.
• Nickel and chrome plating — decorative, best where the screw head is visible next to chrome or nickel hardware.
• Stainless steel (304 / 316) — the answer for humid, coastal and outdoor furniture; 316 for salt air and chlorine. Stainless fasteners should not be mixed casually with plain steel in a wet joint.
• Zinc-flake and similar barrier coatings — used where a higher salt-spray requirement is written into the specification for outdoor or marine-adjacent products.

A salt-spray number is only meaningful with the standard (ASTM B117 or ISO 9227 NSS), the item tested, the pass/fail definition, and whether the test was a batch test or a one-off sample. A number without those four things is a marketing claim.

Quality checks that protect a fastener programme

Fasteners are the cheapest place to hide defects, so inspection has to be specific:

• Thread gauging — go/no-go gauges on diameter and pitch, not just a visual check.
• Dimensional check against the drawing — head diameter, head height, length under head, and the point form.
• Drive fit — drive a bit into the recess and check engagement depth and wobble; a shallow recess is what strips heads on site.
• Hardness and torsion — verify the grade and check that the screw twists without snapping its head off; over-hard screws snap, soft ones strip.
• Coating thickness — plating thickness by X-ray or a simple micron check, plus appearance against the approved sample.
• Salt spray — where a figure is claimed, test the exact item and keep the report with the batch number.
• Batch traceability and weigh-count — a batch code on the bag or carton, and a weight count versus a piece count so a short carton does not become a claim.

If a supplier cannot tell you the steel grade and the coating type of a screw, that is the answer you need about the rest of the programme.

Ordering by the project: MOQ, packing and mixed kits

Most fastener problems at order stage are really packing problems. Decide up front:

• Unit of sale — bulk weight, counted bag, or a labelled kit per unit of furniture. A labelled kit is the most expensive per piece and the cheapest to install.
• Mixed containers and mixed cartons — fasteners are ideal for mixed loading because they are dense and small; use them to fill a container that would otherwise ship half empty.
• Packing that protects coating — individually wrapped or polybagged where heads are visible; bulk where the screw is hidden.
• MOQ and trial quantities — our standard is MOQ from 500 pcs per item, with trial quantities from 50 pcs on most items, so you can validate a specification before committing to a programme.
• Documentation — one drawing or sample reference per item, so the second order matches the first.

Five fastener mistakes that cost importers money

1. Specifying by length only. “40 mm screw” says nothing about diameter, thread or point, and the supplier will pick whatever suits production.
2. Ignoring drive. A Phillips recess driven with an impact driver strips heads; if your market uses powered tools, specify Torx or hex socket and say so in the instructions.
3. Mixing metals in a wet joint. Stainless hardware with plain steel screws is a galvanic corrosion trap in humid markets.
4. No pilot-hole guidance. Particleboard splits and MDF crumbles when the pilot hole is missing from the assembly sheet.
5. Counting by weight without a tolerance. Weigh-count is normal in the trade; if you buy by weight, agree the piece tolerance in writing so a short carton is a claim, not an argument.

What this means for importers in 2026–2027

Fastener sourcing is drifting in the same direction as the rest of furniture hardware: fewer, better-specified items, and more attention to what happens after the container lands. Buyers who publish a screw specification with size, drive, point, material and coating — and who inspect against it — spend less on claims than buyers who chase the lowest per-thousand price. The tools to do it are ordinary: one drawing per item, one approved sample, one batch code, and one pilot-hole note in the assembly sheet.

As a factory-sourced supplier of furniture fasteners and cabinet hardware from China, we build specifications with importers and distributors rather than sell a generic box. Send us the joint, the substrate and the finish of the hardware next to it, and we will return a fastener specification, MOQ and lead time.

FAQ

What is the difference between a chipboard screw and a confirmat screw?

A chipboard screw has a countersunk head and a coarse thread that cuts into particleboard or MDF and is normally driven into a pilot hole. A confirmat screw has a thick shank, a stepped thread and a wide flat head, and is designed to pull two panels into a butt joint without an extra dowel. Use chipboard screws for general fixing and confirmat screws for structural butt joints that may be assembled and taken apart.

Which drive should I specify for furniture assembly?

For hand assembly, Phillips or Pozi is fine and universally understood. Wherever installers use powered drivers, specify Torx or hex socket: they transfer more torque with less cam-out and far fewer stripped heads. Always print the correct bit size in the assembly instructions.

Do I need stainless screws?

If the furniture will live in a humid, coastal or outdoor environment, yes — stainless 304 for general humid use and 316 for salt air or chlorine. Indoors in a dry climate, zinc-plated steel is normally sufficient and cheaper. Never mix plain steel screws with stainless hardware in a wet joint.

How should I count fasteners?

Weigh-counting is standard practice in the fastener trade. If you buy by weight, agree a piece tolerance in writing and keep a batch code on every carton so a shortage can be traced. If exact piece counts matter for a retail kit, buy labelled kits rather than bulk.

Can you supply fasteners with the same finish as the hardware?

Yes. Tell us the finish of the hinge, handle or bracket the screw sits next to and we will match the plating or coating and send an approved sample before production.