One Way Key Manufacturer,Supplier and Exporter in India
Product Code : EL-PL-12415
Jlab Export is a leading One Way Key Manufacturer,and suppliers in India
One Way Key (code EL-PL-12415) is a plug key for making and breaking a single circuit: two brass blocks, each with a 4 mm terminal, sit on a moulded plastic base, and one tapered brass plug with a fluted plastic top fits the hole between them. JLab manufactures the key in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Model | JL353/075 |
| Blocks | Two brass blocks, each fitted with a 4 mm phenolic-insulated terminal |
| Base | Moulded plastic |
| Plug | One tapered brass plug with a fluted plastic top |
| Quality check | Each key is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 4–6 working days |
| Product code | EL-PL-12415 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
Why a Plug Key Rather Than a Switch
The tapered plug wedges against both blocks over a broad area, so the joint adds very little resistance. That matters in bridge, potentiometer and Ohm’s law circuits, where a small extra resistance in series would shift a reading. Pulling the plug out leaves an air gap that breaks the circuit completely, and the open hole shows at a glance that the circuit is off.
Good Practice at the Bench
Insert the plug only while a reading is being taken and remove it straight afterwards, so the cells do not run down and the resistance wires do not warm up and change value. Push it home with a slight twist, hold it by the fluted top, and keep the taper and the blocks clean, because tarnish on the brass raises the resistance of the contact.
Related Keys and Circuit Parts
- Two Way Key — two-plug version that connects a supply to either of two circuits.
- Plug Keys — brass-block plug key with a moulded top on the plug.
- Rheostat 30 Ohm — sliding rheostat that is usually switched by a key in series.
Cells, meters and resistors for the same circuits are grouped in Physics Lab.
Request a Quote
Order through Add To Cart or ask on the contact page; mention the number of keys, model JL353/075 and the delivery address.
Last updated: 26 October 2026
