For clearance checks at the bench and in the field, the HOLEX steel feeler gauge provides hard spring steel blades that pivot on a riveted joint and fold away into a nickel-plated casing with clamp. Each blade measures 100 mm (3.9 in.) in length, a working reach suited to engine bays, machine assemblies, maintenance calls, and toolroom inspection benches.
Choose between 13 and 20 blades to match how finely your work steps through metric clearances. Both versions span 0.05 mm to 1 mm and are held to tolerance T2 under a works standard, and the 20-blade version adds the intermediate thicknesses the 13-blade version leaves out toward the top of that span. The range covers the fine end of valve, guide, and fitting clearances where metric drawings state values in hundredths of a millimeter.
Key features:
• Clearly labeled blades: the thickness value reads at a glance, blade by blade.
• Equal width from blade to blade for a uniform feel in the gap.
• Clamp-equipped nickel-plated casing shields the folded blades between jobs.
When should you reach for a feeler gauge over calipers?
Choose a feeler gauge when the clearance is an enclosed gap that caliper jaws cannot enter, because a blade of exact thickness measures where nothing else fits.
Applications: valve clearance adjustment, spark plug gapping, bearing and guide clearance checks, machine way alignment, fixture setup, deck and gasket surface checks.
Industries: automotive service, engine building, precision machining, equipment maintenance, small-engine repair.
Users: automotive technicians, engine builders, machinists, maintenance staff.
What are feeler gauges used for in daily shop work?
Feeler gauges measure the width of narrow clearances, such as valve lash and spark plug gaps, by feel. You slide a blade of known thickness into the gap until it drags lightly, and the thickest blade that still passes tells you the clearance. The same tool goes by gap gauge in some shops, and this one covers metric clearances across its blade range.
Are the blade markings in millimeters or inch decimals?
Millimeter values, not inch decimals, are what this gauge is marked in. Each blade carries its own thickness label, so you read the value straight off whichever blade fits the gap with a light drag. That matches how metric fastener, engine, and machine clearance specifications are written, so the number on the blade is the number the spec asks about.
Which feeler blade shape reaches into confined openings?
A tapered feeler gauge enters restricted openings more easily than a straight rectangular blade. The steel blades on this gauge taper, so the lead end starts into a confined gap and guides the blade through, which helps around recessed adjusters and shielded clearances. Wipe the blade after contact so residue does not pad the next reading.
Specifications by model:
| Number of Blades | 13 | 20 |
| Blade length | 100 mm | 100 mm |
| ESD protected area (EPA) | no | no |
| CAS AL | 13 | 20 |
| HS code AL | 0,05−0,25 (0,05 steigend) 0,3−1,0 (0,1 steigend) | 0,05−1,0 (0,05 steigend) |
| Min. thickness | 0.05 mm | 0.05 mm |
| Max. thickness | 1 mm | 1 mm |
| Thickness tolerance class (accuracy) | T2 | T2 |
| Configurable | no | no |
| Content | single part | single part |
| Standard | works standard | works standard |
| Material | steel | steel |
| Blade thicknesses | 0.05 mm; 0.1 mm; 0.15 mm; 0.2 mm; 0.25 mm; 0.3 mm; 0.4 mm; 0.5 mm; 0.6 mm; 0.7 mm; 0.8 mm; 0.9 mm; 1 mm | 0.05 mm; 0.1 mm; 0.15 mm; 0.2 mm; 0.25 mm; 0.3 mm; 0.35 mm; 0.4 mm; 0.45 mm; 0.5 mm; 0.55 mm; 0.6 mm; 0.65 mm; 0.7 mm; 0.75 mm; 0.8 mm; 0.85 mm; 0.9 mm; 0.95 mm; 1 mm |
| Article number | 478200 13 | 478200 20 |
| EAN / GTIN | 4045197207463 | 4045197207470 |
| Manufacturer number | 478200 13 | 478200 20 |
| Manufacturer/responsible person | Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany | Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany |
