Description
Overview:
The Square Headed Plug 3/4" BSP is a robust male-threaded plug for sealing pipe ends and unused ports on construction and garden machinery. Made from durable malleable iron, it offers good mechanical strength and impact resistance for workshop and site use. The square head provides a positive grip for easy tightening and removal using a spanner, adjustable wrench, or socket. This plug helps prevent leaks and contamination in threaded systems on pumps, hydraulic blocks, water and air lines, and general plant maintenance. It is suitable for routine servicing, fault isolation, and temporary or permanent blanking of ports. The 3/4" BSP size is widely used; nominal bore is 3/4 inch (about 19.05 mm), with a typical outside thread diameter around 26.4 mm to match standard BSP fittings.
Key Features:
- Malleable iron construction for strength, durability, and dependable service life
- Square head for firm tool engagement and controlled tightening/loosening
- 3/4" BSP male thread (nominal 19.05 mm) for common pipework and machinery ports
- Typical outside thread diameter approx. 26.4 mm for standard BSP connections
- 14 TPI thread form (approx. 1.814 mm pitch) to suit standard BSP systems
- Provides a secure seal for blanking pipe ends and service ports when used with appropriate sealant
- Resists wear and temperature cycling in demanding site conditions
- Clean, precise threads help reduce galling and ease installation
- Simple fitment with standard hand tools; easy to re-torque during maintenance checks
- Reusable when threads remain clean and undamaged
Typical Applications:
Sealing unused hydraulic, pneumatic, water, or coolant ports on plant, compressors, pumps, pressure washer frames, and irrigation or plumbing circuits. Common for blanking test points, drain points, and manifold outlets on site equipment, tractors, mowers, compactors, mixers, and workshop rigs. Suitable for maintenance, winterisation, and system isolation where a reliable threaded seal is required.
Also known as:
Square head plug, blanking plug, male BSP plug, pipe end plug, BSP pipe stopper, threaded pipe plug, service port plug, square-head blank, 3/4 in BSP plug, mechanical blanking fitting. Some users may refer to it by BSPP or BSPT plug naming depending on the mating fitting used.
Product Specifications
| L&S Part No. | 888 034 |
|---|---|
| Unit of Sale | 1 |
| Key Features | - Malleable iron for strength and durability - Square head for easy tool engagement - 3/4" BSP male thread for common ports - 26.4 mm outside thread diameter - 14 TPI thread form for standard BSP systems |


