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  • Manufactured in accordance with ASTM specification A865.
  • Merchant couplings in sizes 1/8 NPS (6 DN) through 2 NPS (50 DN) are normally supplied straight tapped. Sizes 2 1/2 NPS (65 DN) and larger are taper tapped.
  • Taper tapped standard merchant couplings in sizes 1/8 NPS (6 DN) through 2 NPS (50 DN) are available upon request.
  • API line pipe couplings are used in all sizes over 6 NPS(150 DN).
  • Couplings from 1/8 NPS (6DN) through 2 NPS (5ODN) are dipped in rust preventative.
  • Couplings 2 1/2 NPS (65 DN) and larger are phosphated.
  • Galvanized full couplings are also available.
  • Half couplings are chamfered on one end and squared on the other.
Product Image - Standard Steel Merchant Couplings
Unit of Measure
1 

Item #

Item Name

NPS

Outside Diameter

Length (Full)

Length (Half)

Threads

Carton Quantity (Full)

Quantity
336-1/8 N/A Standard Steel Merchant Couplings N/A 1/8 N/A 0.563 inches N/A 13/16 inches N/A 11/32 inches N/A 27 inches N/A 100
336-1/4 N/A Standard Steel Merchant Couplings N/A 1/4 N/A 0.719 inches N/A 1 3/16 inches N/A 17/32 inches N/A 18 inches N/A 100
336-3/8 N/A Standard Steel Merchant Couplings N/A 3/8 N/A 0.875 inches N/A 1 3/16 inches N/A 17/32 inches N/A 18 inches N/A 100
336-1/2 N/A Standard Steel Merchant Couplings N/A 1/2 N/A 1.063 inches N/A 1 9/16 inches N/A 22/32 inches N/A 14 inches N/A 100
336-3/4 N/A Standard Steel Merchant Couplings N/A 3/4 N/A 1.313 inches N/A 1 5/8 inches N/A 3/4 inches N/A 14 inches N/A 50
336-1 N/A Standard Steel Merchant Couplings N/A 1 N/A 1.576 inches N/A 2 inches N/A 15/16 inches N/A 11 1/2 inches N/A 30
336-1 1/4 N/A Standard Steel Merchant Couplings N/A 1 1/4 N/A 1.900 inches N/A 2 1/16 inches N/A 31/32 inches N/A 11 1/2 inches N/A 25
336-1 1/2 N/A Standard Steel Merchant Couplings N/A 1 1/2 N/A 2.200 inches N/A 2 1/16 inches N/A 31/32 inches N/A 11 1/2 inches N/A 25
336-2 N/A Standard Steel Merchant Couplings N/A 2 N/A 2.750 inches N/A 2 1/8 inches N/A 1 inches N/A 11 1/2 inches N/A 20
336-2 1/2 N/A Standard Steel Merchant Couplings N/A 2 1/2 N/A 3.250 inches N/A 3 1/8 inches N/A 1 1/2 inches N/A 8 inches N/A
336-3 N/A Standard Steel Merchant Couplings N/A 3 N/A 4.000 inches N/A 3 1/4 inches N/A 1 9/16 inches N/A 8 inches N/A
336-3 1/2 N/A Standard Steel Merchant Couplings N/A 3 1/2 N/A 4.625 inches N/A 3 3/8 inches N/A 1 5/8 inches N/A 8 inches N/A
336-4 N/A Standard Steel Merchant Couplings N/A 4 N/A 5.000 inches N/A 3 1/2 inches N/A 1 11/16 inches N/A 8 inches N/A
336-5 N/A Standard Steel Merchant Couplings N/A 5 N/A 6.296 inches N/A 3 3/4 inches N/A 1 3/4 inches N/A 8 inches N/A
336-6 N/A Standard Steel Merchant Couplings N/A 6 N/A 7.390 inches N/A 4 inches N/A 1 7/8 inches N/A 8 inches N/A
Unit of Measure
1