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Household Pumps

A huge range of pumps for household, commercial, agricultural and industrial use

Floating Fountains & Dam Aerators

Floating Fountains and Aerators for Dams, Lakes and Large Ponds

Pond Help & Information

Need a hand working out the right gear for your project? Browse our range of help pages or submit a help request directly to our specialists.

Hansen Large Poly Back Nuts

Screws on to BSP threads

These Hansen Large Back Nuts are often used with rubber washers to create a water-tight seal on a wall or similar. Screws onto BSP threads.

Suits BSP thread Part No.
3/4" SBNL 20B
1" SBNL 25B
1 1/4" SBNL 32B
1 1/2" SBNL 40B



Approx BSP to metric thread equivalent 
 3/4" = 20mm      1" = 25mm        1 1/4" =  32mm     1 1/2" = 40mm       2" = 50mm

From $2.50

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