How should you fix an engraved metal ID tag to equipment?

A clear serial number is little use if the tag falls off, corrodes around its fasteners or is fitted over a service access point. Workshops often spend time choosing the engraved material but treat the fixing method as an afterthought. Rivets, screws, wire ties, adhesives and direct marking each solve different problems. The right choice depends on the equipment owner’s approved design, the surface, expected service life and whether the tag may need to be removed during maintenance.

Start with what the tag is allowed to do

Distinguish a supplementary asset label from a statutory, manufacturer or safety-critical identification plate. A maintenance contractor can often add its own internal asset number, but it cannot arbitrarily replace a rating plate, remove an existing serial number or change a vehicle VIN. Ask for the approved attachment location and the customer's authority to fit the tag. If the equipment is leased, certified, pressurised, electrically enclosed or load-bearing, confirm whether modifications are permitted before drilling, bonding or direct marking.

Record the expected lifetime and environment: indoor dry machinery, outdoor agricultural equipment, marine spray, vibration, frequent cleaning, high temperatures or periodic removal. A decorative plaque on a cabinet door is a different job from an asset tag on a vibrating compressor. The fastening specification should be part of the approved drawing, not a decision made at packing.

Rivets: secure but difficult to reverse

Rivets can provide a consistent mechanical attachment where the substrate has approved holes and enough access. They are often attractive for metal plates that are not expected to be removed. But a rivet hole may weaken thin sheet, pierce a sealed housing or damage a corrosion-protection system. Rivet material, head size, grip range and installation force must match the actual assembly. Do not drill into a pressure vessel, chassis member, electrical enclosure or safety-critical component merely to attach a tag.

Ask whether the customer wants holes in the plate before engraving. A small batch may need a drilling jig so every tag aligns with the approved fixing centres. Deburr holes and inspect the plate for bending or sharp edges. If the installer lacks rear access, the selected rivet type must be assessed for the particular substrate and service conditions.

Screws: serviceable when the design allows them

Screws make sense where an approved threaded boss or existing fixing point is available and a plate may need replacement. Their limitations include loosening under vibration, damage to threads, protruding heads and incorrect tightening. Use the customer's specified fastener and torque procedure; do not invent a universal torque for a small plate. Check that removing the tag later will not disturb a safety cover or an unrelated assembly.

For thin plates, allow sufficient edge distance and room for the screw head without crowding the engraved text. If the equipment is cleaned regularly, consider whether recessed heads will trap dirt. The plate artwork should show the holes and a clear keep-out area around them before production starts.

Wire ties and bands: useful where drilling is forbidden

Metal wire ties or bands can hold a tag around a suitable pipe, handle or frame member without making a new hole. They are useful for certain maintenance and plant identification jobs, but may snag, rotate, abrade a coating or become loose. Choose the attachment point with the equipment owner. Avoid moving parts, hot surfaces, electrical hazards, sharp edges and locations where a loose tag could fall into machinery.

Where a band is used, check the approved material and its compatibility with the environment. Inspect the edge finish of both the tag and band, and document how the installation will be checked during routine maintenance. A tie-on tag may be acceptable for an internal asset reference while being entirely unsuitable for a permanent manufacturer plate.

Adhesives: no holes, but surface preparation is critical

An adhesive-backed metal or film tag avoids drilling but introduces surface chemistry, temperature, moisture and ageing questions. Smooth, clean surfaces generally offer a more predictable trial than heavily textured powder coat. Verify the adhesive grade, substrate and application conditions with the material supplier. A quick stick test is not a service-life guarantee, especially on oily or vibrating equipment.

Agree who will clean the surface and what product they may use. Do not sand away protective coating or apply solvent to a finished housing without approval. If the environment is demanding, use a documented test or choose a different fixing method. For specialist film, read our textured powder-coat adhesion trial.

Direct marking: no tag to lose, but a permanent alteration

For a suitable, engineer-approved metal surface, direct marking can eliminate a separate plate and fastener. A handheld dot-peen tool creates indented characters, while a fibre laser may create surface marks on compatible metals. Neither process is suitable for every part. Consider material thickness, fatigue, corrosion, coating, access, reflections, fumes and required legibility. Obtain written engineering approval for direct marking, especially on structural or regulated equipment.

ONAGONE lists an ML-SC12030A handheld dot-peen machine at £1,495.76 and a 20W/30W fibre laser machine at £2,594.37 in Shopify as of 1 November 2026. These are listed product prices, not quotations for installation or evidence that a particular marking process is approved. Both variants were marked available for sale by the Admin API, but public checkout and supplier delivery should be confirmed before ordering.

A practical comparison for a 150-tag maintenance project

Imagine 150 supplementary asset tags for a fleet of non-safety-critical workshop trolleys. The customer already has approved threaded mounting points on some trolleys, while others have suitable tie-on locations. Divide the order by attachment type before producing the artwork. Record hole centres for screw-fixed plates, tag orientation for ties and a separate installation checklist. Do not silently substitute adhesive for a mechanical fixing to save labour.

Hypothetical commercial example: 150 engraved tags sold at £10 each generate £1,500 before VAT treatment. Assume £375 blanks and fixings, £365 artwork, marking and inspection labour, £28 energy and consumables, £95 allocated machine finance/depreciation, £70 packing and delivery, £85 acquisition and transaction costs, and £82 expected returns or rework. Total illustrative costs are £1,100, leaving £400 contribution before rent, insurance, other overheads and tax. Installation labour and travel would be extra unless explicitly included. VAT-registered sellers must calculate net revenue and recoverable VAT correctly.

Inspect the installed tag, not just the engraving

1. Check the tag text against the approved asset record and confirm the correct equipment.
2. Inspect the fastener or bond and make sure no protective cover, warning or existing plate is obscured.
3. Confirm the tag cannot contact moving parts or create a snag or sharp edge.
4. Photograph the final position where the customer permits and record the installation date.
5. Specify how loose, damaged or unreadable tags should be reported and replaced.

If a fixing fails during a trial, do not immediately upgrade to a more aggressive method. Revisit the location and equipment constraints. A stronger rivet can be a worse decision than a properly approved tie-on tag if it damages the substrate.

Frequently asked questions

Is riveting always the most permanent method?

No. Suitability depends on substrate, corrosion, access, vibration and whether drilling is permitted.

Can I drill a vehicle chassis to fit an identification plate?

Do not do so without lawful authority and appropriate engineering or manufacturer approval. Never alter, obscure or recreate a vehicle identity unlawfully.

Can a dot-peen marker replace all metal tags?

No. Direct impact marking can be unsuitable for thin, structural, coated or safety-critical parts.

Should the tag be engraved before the holes are made?

Use an approved drawing and controlled production sequence; the important point is consistent hole positions, legible artwork and inspection.

Choose the marking method: review ONAGONE's handheld dot-peen marking machine for approved direct industrial marking, or compare the bench-top fibre laser for suitable separate metal tags. Confirm sample suitability, safe operation, availability and current checkout terms before purchase.