15.62/15.75/15.87/16 mm Plane Glass Set For Micrometer Inspection 0.1 µm Accuracy, 4-Piece – Metav IndustryLine

The optical flat set provides a reliable reference with 0.1 µm flatness and 0.006 mm parallelism, enabling fast verification of 0–25 mm micrometres and consistent measurement reproducibility. With four precisely lapped plates in incremental heights and a compact 30 mm diameter, this kit streamlines routine checks and reduces downtime—order the set directly via Metav Werkzeuge or consult our advisors for detailed application advice.

Flat Glass Set M318.225 — Optical flats for micrometre verification, 0.1 µm flatness

The Flat Glass Set M318.225 is an optical flat kit designed for the verification and inspection of micrometres with a measuring range of 0–25 mm, suitable for workshop and calibration-bench use.

• Flatness tolerance 0.1 µm
• Plate heights 15.62 / 15.75 / 15.87 / 16.00 mm
• Parallelism 0.006 mm across surfaces
• For micrometres 0–25 mm verification
• Precision set of four optical flats

Precision where zero readings must be trusted

Optical flats serve as a high-fidelity reference for checking contact measuring instruments. The set delivers a flatness of 0.1 µm, which provides a visible, repeatable standard for zero and span checks on small micrometres. Using an accurately produced optical surface minimises uncertainty introduced by uneven contact faces and worn anvils. For routine inspection, the plates offer a quick method to confirm that a micrometre reads consistently at defined gauge heights, supporting traceable quality control and reducing the likelihood of production rejects.

Designed for practical verification and repeatability

Each plate in the set is supplied in the specified heights of 15.62, 15.75, 15.87 and 16.00 mm, enabling incremental checks across a representative range of micrometre readings. With a compact 30 mm diameter and a parallelism of 0.006 mm, the kit provides a stable contact area and consistent seating during measurements. The four-piece composition allows comparison between plates to reveal systematic deviations and supports quick on-bench decision-making. This tangible reference performs well where rapid verification is required without full laboratory calibration.

Simple handling, careful maintenance

The kit is intended for careful workshop use: keep the optical faces clean and free from grit, handle by the edges, and store in a protective case to preserve surface integrity. Gentle cleaning with lint-free cloths and suitable solvents prevents damage to the lapped surfaces; avoid abrasive materials and impact. Regular visual inspection of the flats maintains confidence in their condition and prolongs service life. Because these plates are precision optical references, they are best used as stability checks between formal calibration intervals rather than as a substitute for accredited calibration certificates.

Applications, suitability and workshop advantage

Classified for verification of instruments in the Micro range (suitable for measuring ranges such as 0–25 mm), this flat glass set is ideal for fine mechanical workshops, toolrooms and calibration benches where compact instruments are regularly checked. The kit supports faster in-process control and helps maintain a consistent quality level across small-batch production and precision assembly. By providing an immediate, reliable reference, the set contributes to fewer measurement-related stoppages and clearer go/no-go decisions during day-to-day inspection routines.

For reliable, workshop-ready micrometre verification, contact Metav Werkzeuge for the Metav IndustryLine Flat Glass Set M318.225 and personalised advice at +49 2822 7131930 or info@metav-werkzeuge.com

Technical data

• Article number: M318.225

• GTIN: 4054469184265

• EClass: 21170126

• Flatness: 0.1 µm

• Parallelism: 0.006 mm

• Diameter: 30 mm

• Set composition: 4 plates

• Weight (set): 0.5 kg

• Plate heights: 15.62 mm, 15.75 mm, 15.87 mm, 16.00 mm

• Intended use: Verification of micrometres 0–25 mm

• Packaging: set delivery

• Label: Flat Glass Set for micrometre inspection

FAQ

What is the primary purpose of this flat glass set?
The flat glass set provides precision reference surfaces to verify and inspect micrometres (0–25 mm), enabling quick bench checks of zero and span for consistent measurement results.

How precise are the flats and what does that mean in practice?
With a flatness of 0.1 µm and a parallelism specification of 0.006 mm, the plates allow visible and repeatable reference checks that reduce measurement uncertainty during routine inspections.

Can these plates replace laboratory calibration?
No—these optical flats are intended for on-bench verification and stability checks; formal calibration by an accredited laboratory remains necessary for traceable certification.

How should the Flat Glass Set M318.225 be cared for?
Handle by the edges, keep surfaces clean with lint-free cloths and appropriate solvents, avoid impacts and abrasive cleaning, and store the plates protected to preserve lapped surfaces.

Which instruments are compatible with this set?
The kit is designed for verification of micrometres with measuring ranges up to 0–25 mm and is particularly suited to fine mechanical workshops and toolrooms.

Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com