Triangular File
Product Code : LSK-SWES-10709
Triangular File (SKU LSK-SWES-10709), often called a three-square file, is a tapered file of triangular section mounted on a hardwood handle for a secure grip. Its sharp edges reach into corners and acute internal angles that a flat file cannot, and it is also used to score glass and to re-shape damaged threads. Science Lab Supplies supplies it from Ambala, India to technical training institutes, college workshops and laboratories, contractors and distributors.
Specifications
This file has a triangular cross-section that tapers towards the tip, so each of its three faces meets the next at 60 degrees. It is fitted with a hardwood handle, which means it is ready to use on arrival and safer for trainees than a bare tang.
| Parameter | Value |
|---|---|
| SKU | LSK-SWES-10709 |
| Also known as | Three-square file |
| Section | Triangular, tapered |
| Handle | Hardwood, fitted |
| Typical work | Internal angles over 60 degrees, square corners, thread repair, scoring glass |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Triangular File
The triangular file is used wherever an angled or cornered profile must be cleaned out by hand: square corners, acute internal angles greater than 60 degrees, and the flanks of bolt and screw threads. In laboratories it is also the usual tool for scoring glass tubing before it is snapped.
- ITI Fitter and Welder trades: clearing corners and notches in fitting jobs.
- Maintenance training: re-shaping damaged threads on bolts and screws.
- School and college chemistry labs: scoring glass tubing and rod before cutting.
Standard Scope of Supply
Each Triangular File is supplied as a single tool with its hardwood handle already fitted. It needs no further assembly, and any optional accessories or additional hand tools you want with it are listed separately on the quotation.
Packing, MOQ and Lead Time
Quotations are prepared for any quantity, from a few files for a laboratory to one per trainee for a full workshop intake. Every quotation sets out the packing, delivery time and price for the quantity you name, and it can include the other files and hand tools you need.
As a registered exporter with an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Vietnam, Malaysia, Peru, Egypt, Iraq and Nigeria. Enquire via the contact page or enquiry cart; see also the lab tender page.
Frequently Asked Questions
Can a triangular file be used to cut glass tubing?
Yes. It is used to make a single score mark on glass tubing or rod, which is then snapped by hand. Wear eye protection and protect your hands with a cloth when breaking the glass.
Does the file come with a handle?
Yes. It is mounted on a hardwood handle, so it can be used straight away without fitting a separate handle to the tang.
Who supplies the Triangular File?
Science Lab Supplies supplies it from Ambala, India, alongside its flat and round files and other workshop hand tools for training institutes and laboratories.
Is a size or length stated for this file?
No length is listed for this item. Tell us the length and grade you need through the contact page and it will be confirmed on the quotation.
Related Files and Cutting Tools
A triangular file is normally bought with the other file sections and basic cutting tools, so a trainee bench can handle flat, curved and angled work. These four items complete that set and can be added to the same enquiry as the triangular file.
- Flat File — for flat surfaces and square edges.
- Round File — for holes and concave curves.
- Hacksaw Frame — for cutting bar, tube and bolts.
- Manual Hand Shear — for cutting sheet before filing.
Browse the full Standard Welding Equipment Set range or all TVET lab equipments.
Last updated: 25 September 2026
