1 1/2 inches BSP Flanged Sink Waste Brass Backnut

• Pack of one - 1 1/2 inch BSP Flanged Brass Backnut
• Most plumbing products are measured using BSP thread dimensions which measure 1/4 inches larger than that stated, therefore this 1 1/2 inch BSP thread measures approximately 1 3/4 inches in diameter
• Outer diameter - 55mm, thickness - 10mm
• Spanner Size - 51mm