Cross arms, stay sets, brackets, yoke plates, clamps and dead-end fittings — fabricated and hot-dip galvanized on one floor at Howrah. Line hardware is small, cheap and the first thing to fail on a distribution line, which is why the coating figure matters more than the price per piece.
Indo East manufactures and galvanizes pole line hardware and line fittings at its Jangalpur works in Howrah — cross arms, stay sets and rods, plates, brackets, yoke plates, clamps and dead-end fittings, for 11 kV and 33 kV distribution and for transmission line work. Steel to IS 2062, fittings to IS 2486, hot-dip galvanized to IS 2629 and IS 4759 at 75–85 microns in our own 7 metre kettle.
Two things about this page are unusual, and both are deliberate. First, it names IS 2486 — the standard your utility specification is actually written in, and one we have not found cited on a single competing hardware page. Second, it says which items we make, which our jobbers make to our drawings, and which we buy in. A buyer finds that out eventually. It is better said at enquiry than discovered at inspection.
Named item by item, because a hardware enquiry is priced line by line.
| Item | Where it goes | Origin |
|---|---|---|
| Cross arms — straight, V and Y | Pole-top support for the conductor, in the three standard configurations | Made at Howrah |
| Stay sets — HT and LT | The guying assembly that holds a pole against conductor tension | Made at Howrah |
| Stay rods | The buried leg of the stay assembly | Made at Howrah |
| Stay plates and anchor plates | The buried bearing plate that takes the load into the soil | Made at Howrah |
| Pole clamps, pole top brackets, D-iron brackets | Fixing the arm, the insulator pin or the fitting to the pole | Made at Howrah |
| Yoke plates | Spreading the load between strings on twin and quad arrangements | Made at Howrah |
| Eye bolts and U-bolts | General line fixing | Made at Howrah |
| Danger boards | Statutory marking on poles and structures | Made at Howrah |
| Guy grips, preformed dead ends, armour rods | Helically formed conductor terminations and protection | Made to our drawings by our jobbers, galvanized here |
| Ball hooks and socket eyes | Insulator string end fittings under IS 2486 | Made to our drawings by our jobbers, galvanized here |
| Compression joints and PG clamps | Conductor jointing and parallel-groove connections | Made to our drawings by our jobbers |
| Vibration dampers | Aeolian vibration control on spans | Made to our drawings by our jobbers |
| Machine bolts, double arming bolts, shackle bolts | Standard line fasteners | Bought in and supplied to specification |
Suspension clamps, tension clamps and insulator hardware are supplied alongside the structures they fit. Where a drawing or a dimensional reference exists, work is to that drawing rather than to a catalogue number.
Made at our Howrah works. The fabricated steel — cross arms, stay sets and rods, stay and anchor plates, pole clamps, pole top and D-iron brackets, yoke plates, eye bolts, U-bolts and danger boards. Our own floor, our own kettle, our own coating readings.
Made to our drawings by our jobbers, galvanized in our own kettle, released under our inspection. The forged, wire-formed and cast items — guy grips and preformed dead ends, armour rods, ball hooks and socket eyes, compression joints, PG clamps and vibration dampers. These need forging, wire forming or casting, which are not processes we run. They are made to our specification, they are coated here, and they carry our inspection release.
Bought in and supplied against the specification. Standard fasteners — machine bolts, double arming bolts and shackle bolts.
Against your bill of materials we will mark which line is which before you order.
| Part | What it covers |
|---|---|
| IS 2486 Part 1 | General requirements and tests for metal fittings of insulators for overhead lines above 1000 V |
| IS 2486 Part 2 | Dimensional requirements — the interchangeability clause |
| IS 2486 Part 3 | Locking devices |
| IS 2486 Part 4 | Tests |
The West Bengal state utility specification for compression type tension hardware fittings cites Parts 1, 2 and 3 by name, alongside IS 2629, IS 4759, IS 6745 and IS 2633 for the coating and its tests. If your enquiry names the parts that apply, every quotation you receive is answering the same question.
| Requirement as written | What that means | What we hold |
|---|---|---|
| 610 g/m² | Zinc mass per square metre — how most Indian utility purchase specifications state it | ≈ 85 microns. We hold and certify it |
| 75–85 µm | The same requirement expressed as thickness | Read on a calibrated DFT gauge, reported per batch |
| ASTM A123 | The American route, used on export orders | Quoted against the grade and section thickness you name |
| “Galvanized as per IS” | Not a requirement. It names no coating mass and no test | We will ask which figure applies rather than choose the cheapest reading of it |
See IS 4759 for the conversions, IS 2486 for the fittings standard, and the coating calculator to convert a figure in your own specification right now.
Bolt grades in this category are specified under IS 1367, and the ones that appear are 4.6, 5.6 and 8.8. The grade changes the source and the price and it is invisible in a comparison table, so it belongs in the enquiry rather than in a post-award clarification.
Hardware is usually a small line on a substation or line order, and usually the line that arrives late, from a different vendor, at a different coating. Fabricated and galvanized here, it carries the same coating standard, the same batch readings and the same inspection release as the structures it fits, and it ships in the same consignment.
That is a scheduling argument rather than a technical one. On a line waiting to be energised, scheduling is the argument that matters.
Answered from our own line, not from the standard’s cover page.
We fabricate and hot-dip galvanize the steel fittings on our own floor: cross arms in straight, V and Y forms, HT and LT stay sets, stay rods, stay and anchor plates, eye bolts, pole clamps, pole top brackets, D-iron brackets, yoke plates, U-bolts and danger boards. Forged, wire-formed and cast items are manufactured to our drawings by our jobbers, galvanized in our own kettle and supplied under our inspection. Standard fasteners such as machine bolts, double arming bolts and shackle bolts are bought in. We say which is which rather than presenting everything as our own manufacture.
IS 2486 is the standard for metal fittings of insulators for overhead power lines above 1000 V. Part 1 covers general requirements, Part 2 the dimensional requirements, Part 3 locking devices and Part 4 the tests. Indian utility purchase specifications are written in this language, and West Bengal's own specification for compression type tension hardware cites Parts 1, 2 and 3 directly. It is worth naming in your enquiry, because it is the clause a comparable quotation is built on.
IS 2629 for the process and IS 4759 for the coating, at 75 to 85 microns, read on a calibrated DFT gauge and reported per batch. IS 6745 and IS 2633 cover the coating mass and uniformity tests. Where a utility specification states 610 g per square metre, that is the same requirement expressed by mass rather than thickness, and it works out at roughly 85 microns.
Yes. Whatever the origin of the component, the zinc goes on in our own 7 metre kettle at Howrah, on the same line and against the same coating readings as the structures. That is the point of the arrangement: one coating standard and one set of DFT records across the whole bill of materials, rather than a bracket at one figure and a clamp at another.
Fastener grades are specified under IS 1367. Grades 4.6, 5.6 and 8.8 are the ones that appear in this category. Tell us the grade at enquiry rather than after award, because it changes both the source and the price and it is not visible in a comparison table.
We supply eight state electricity utilities and hold ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018. Where a specification requires NABL-accredited type-test reports dated within a stated period, our own laboratory is real but is not NABL-accredited, so that testing is arranged with an accredited laboratory against the order. It needs to be in the schedule from the start rather than discovered at inspection.
Yes, hardware is quoted and supplied on its own. But it is usually cheaper and considerably less trouble shipped with the structures it fits, because it then carries the same coating standard, the same batch readings and the same inspection release, and arrives in the same consignment instead of turning up late from a different vendor at a different coating.
Give the item with its drawing or dimensional reference, the steel and fastener grades, the coating figure in microns or grams per square metre, the quantity, and whether third-party inspection applies. An enquiry that says galvanized without a number cannot be compared across suppliers, because that single line is where quotations differ most.
Give us the items, the coating figure and the standard, and we will come back with a quotation that marks which line we manufacture, which our jobbers make to our drawings, and which we buy in. Galvanizing is on our own floor, so the coating answer comes from us and not from a sub-contractor.
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