Please log in here to access all benefits, including promotional discounts and faster checkouts.

75-100mm Metric Outside Micrometer - 3203 Series (Insize)

SKU:3203-100A

The 75-100 mm Metric Outside Micrometer from Insize, part of the 3203 Series, is a precision tool designed to measure external dimensions with quick, repeatable results. It’s a reliable choice fo... Read more ↓
Range (mm)75-100
Setting Ring287.5mm (optional)
l107
a15
b60
Accuracy±0.005mm
View all specifications ↓
Download Cutting Data
£39.94
Prices shown ex. VAT
4–5 days estimated lead time — subject to availability
View Other Sizes →
Free delivery over £50 ex VAT
Secure checkout
14-day returns
30+ years expertise
Klarna
Pay in 3 interest-free instalments. No extra cost if paid on time. 18+ only.
Learn more about Klarna
Speak to our team
01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

The 75-100 mm Metric Outside Micrometer from Insize, part of the 3203 Series, is a precision tool designed to measure external dimensions with quick, repeatable results. It’s a reliable choice for engineers, machinists, inspectors, buyers, and hobbyists who need accurate readings on parts such as shafts, pins, and housings.

Graduated in 0.01 mm increments and featuring carbide measuring faces, this micrometer resists wear in busy workshop environments to extend tool life and maintain accuracy. It’s supplied with setting standards (except for the 0-25 mm range), and its measurement capability extends up to 300 mm, providing broad coverage for everyday manufacturing tasks.

  • 0.01 mm Graduation: Clear, fine increments for quick, precise dimension checks and tight tolerance verification.
  • Carbide Measuring Faces: Hardened contact surfaces that resist wear, delivering long-lasting accuracy in routine use.
  • Setting Standards Included: Comes with calibrated setting standards (except 0–25 mm) to speed setup and ensure repeatable zeroing across measurements.

With its precise graduation, durable carbide faces, and convenient setting standards, this micrometer supports fast, confident measurements, reduces downtime, and delivers reliable results across a broad range of external dimensions up to 300 mm.

Range (mm) 75-100
Setting Ring 287.5mm (optional)
l 107
a 15
b 60
Accuracy ±0.005mm
Read Out Analogue
mm or Inch mm
Data Output No
Individual or Set Individual
Graduation 0.01mm

What time are Protool open?

We are open Monday to Friday between 8:30am and 5pm.

Do you offer Free Next Day delivery?

Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.

We also offer the following:

  • Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
  • DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
  • Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
  • DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.

For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.

*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.

★★★★★
Nice experience staff are very helpful and interested...
Staff are very helpful and interested in providing a good service making us the customer feel valued.
Bill
★★★★★
first place we look
honest about stock and prices are competitive.
Phil
★★★★★
Polite and helpful
Staff are very helpful and polite.Goods that were in stock were dispatched same day and back orders were quick in coming through .
Graham
★★★★★
Buying experience
Phone requests are handled quickly and without any fuss. The website is easy to use and straightforward to order from. It’s especially helpful that it shows real‑time availability, so we don’t need to call to confirm whether parts will arrive.
Jeremy

Full Range: Metric Outside Micrometers - 3203 Series (Insize)

View full collection →

You are viewing 3203-100A. Click any other SKU to view its full details.

Product SKURange (mm)AccuracyPriceStock Order
3203-25A 0-25±0.004mm£24.91 4-5 days
3203-50A 25-50±0.004mm£27.32 4-5 days
3203-75A 50-75±0.005mm£35.58 4-5 days
3203-100A Viewing75-100±0.005mm£39.94 4-5 days
3203-125A 100-125±0.006mm£54.29 4-5 days
3203-150A 125-150±0.006mm£62.21 4-5 days
3203-175A 150-175±0.007mm£78.86 4-5 days
3203-200A 175-200±0.007mm£82.07 4-5 days
3203-225A 200-225±0.008mm£88.50 4-5 days
3203-250A 225-250±0.008mm£102.16 4-5 days
3203-275A 250-275±0.009mm£113.63 4-5 days
3203-300A 275-300±0.009mm£120.52 4-5 days