Description
Overview:
The Square Headed Plug 3" BSP is a heavy-duty male pipe plug made from durable malleable iron for reliable sealing of unused ports and pipe ends. It features a 3 inch (76.2 mm) British Standard Pipe (BSP) thread for compatibility with standard BSP female fittings used across plumbing, heating, air, and general industrial pipework. The square head allows a firm grip with an adjustable spanner or socket, making installation and removal straightforward, even where space is limited. Malleable iron offers good toughness and resistance to shock, helping the plug withstand tightening loads and vibration without cracking. Supplied under MPN 888 300, this is a practical choice for plant rooms, workshops, agricultural setups, and site services where a dependable, leak-resistant blank is required.
Key Features:
- Robust malleable iron body for strength and long service life
- 3 inch (76.2 mm) BSP male thread for a secure, standardised connection
- Square head for positive tool engagement and easier fitting or removal
- Suitable for sealing pipe ends and blanking off unused outlets
- Helps achieve a tight, leak-resistant closure when used with appropriate thread sealant or PTFE tape
- Resists shock and vibration better than brittle cast iron
- Simple, no-frills design with minimal maintenance requirements
- Widely compatible with plumbing, heating, air, and process pipework using BSP threads
- Clean external faces for easy inspection and re-use
- Stocked for quick dispatch to minimise downtime
Typical Applications:
Blanking off unused ports on manifolds, valves, pumps, and tanks; sealing ends of steel pipework in plumbing and heating systems; capping compressor and compressed air distribution lines; closing test points on construction and agricultural machinery pipework; providing a temporary or permanent end stop during installation, pressure testing, repairs, or system modifications.
Also known as:
Blanking plug, square-head bung, pipe end stopper, screw-in bung, BSP male blank, iron end closure, pipework bung, 3 in BSP stopper, male BSP cap (plug type), square head pipe bung.
Product Specifications
| L&S Part No. | 888 300 |
|---|---|
| Unit of Sale | 1 |
| Key Features | - 3 inch (76.2 mm) BSP male thread - Malleable iron for strength and shock resistance - Square head for easy tool engagement - Suitable for sealing unused pipe ends - Compatible with plumbing and industrial pipework |


