Description
Overview:
The Yellow 3.7mm (4BA) Ring Terminal is a pre‐insulated crimp connector for making secure, vibration‐resistant terminations to a stud or post. Supplied in a pack of 50, each terminal features a yellow colour sleeve for quick identification during wiring and maintenance. The 3.7mm ring size suits 4BA fixings commonly found across small plant, power tools, pumps, generators, and garden machinery such as mowers and compact equipment. A metal ring and crimp barrel provide a firm mechanical and electrical connection when installed with a suitable crimp tool. Designed for reliable service in vehicles, equipment panels, and control boxes, these ring terminals help keep connections tidy, strain‐relieved, and resistant to loosening. Manufacturer Part Number (MPN): 205 129.
Key Features:
- 3.7mm ring size (suits 4BA studs) for secure terminations on posts and terminal blocks
- Yellow sleeve for easy circuit identification and organisation across looms and panels
- Pack of 50 to cover repairs, spares, and small production runs
- Pre‐insulated design helps protect against shorts and improves handling during installation
- Simple to fit using standard crimping pliers or a ratchet crimp tool
- Supports neat, low‐profile connections that resist vibration and loosening in service
- Suitable for use on machinery, vehicles, and equipment control panels
- Durable construction for consistent crimp quality and long‐lasting performance
Typical Applications:
Used to terminate a wire onto a 3.7mm (4BA) stud on battery isolators, junction blocks, fuse holders, switches, solenoids, and earth points. Common in construction plant electrics, garden machinery harnesses, small generators, pressure washers, compressors, compactors, ride‐on mowers, and utility trailers. Ideal for repairs, retrofits, and new loom builds where a secure, closed‐ring connection is preferred.
Also known as:
Ring crimp, ring lug, ring eye terminal, eyelet terminal, cable lug, wire crimp terminal, crimp ring connector, insulated ring connector.
Product Specifications
| L&S Part No. | 205 129 |
|---|---|
| Unit of Sale | 50 Pieces |
| Key Features | - 3.7mm ring size suits 4BA studs - Yellow sleeve aids circuit identification - Pack of 50 for repairs and spares - Pre-insulated to prevent shorts - Fits with standard crimping tools |
| Color | Yellow |


