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  • Manufactured in accordance with ASTM Specification A865.
  • All sizes are taper tapped.
  • Non-recessed couplings will be supplied for sizes under 6 NPS unless otherwise specified.
  • Couplings above 6 NPS (150 DN) will be supplied recessed only.
  • Extra strong recessed couplings can be supplied in sizes under 6 NPS (750 DN).
  • Couplings 1/8 -1 1/2 NPS (6 - 40 DN) are dipped in rust preventative.
  • Couplings 2 NPS (50 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 - Extra Strong  Steel Couplings
Unit of Measure
1 

Item #

Item Name

NPS

Outside Diameter

Length (Full)

Length (Half)

Carton Quantity (Full)

Carton Quantity (Half)

Quantity
337-1/8 N/A Extra Strong (XS) Steel Couplings N/A 1/8 N/A 0.563 inches N/A 1 1/16 inches N/A 15/32 inches N/A 100 N/A 100
337-1/4 N/A Extra Strong (XS) Steel Couplings N/A 1/4 N/A 0.719 inches N/A 1 5/8 inches N/A 3/4 inches N/A 100 N/A 100
337-3/8 N/A Extra Strong (XS) Steel Couplings N/A 3/8 N/A 0.875 inches N/A 1 5/8 inches N/A 3/4 inches N/A 100 N/A 100
337-1/2 N/A Extra Strong (XS) Steel Couplings N/A 1/2 N/A 1.063 inches N/A 2 1/8 inches N/A 1 inches N/A 50 N/A 100
337-3/4 N/A Extra Strong (XS) Steel Couplings N/A 3/4 N/A 1.313 inches N/A 2 1/8 inches N/A 1 inches N/A 50 N/A 100
337-1 N/A Extra Strong (XS) Steel Couplings N/A 1 N/A 1.576 inches N/A 2 5/8 inches N/A 1 1/4 inches N/A 25 N/A 50
337-1 1/4 N/A Extra Strong (XS) Steel Couplings N/A 1 1/4 N/A 2.054 inches N/A 2 3/4 inches N/A 1 5/16 inches N/A 25 N/A 70
337-1 1/2 N/A Extra Strong (XS) Steel Couplings N/A 1 1/2 N/A 2.200 inches N/A 2 3/4 inches N/A 1 5/16 inches N/A 20 N/A 55
337-2 N/A Extra Strong (XS) Steel Couplings N/A 2 N/A 2.875 inches N/A 2 7/8 inches N/A 1 3/8 inches N/A 15 N/A 35
337-2 1/2 N/A Extra Strong (XS) Steel Couplings N/A 2 1/2 N/A 3.375 inches N/A 4 1/8 inches N/A 2 inches N/A N/A
337-3 N/A Extra Strong (XS) Steel Couplings N/A 3 N/A 4.000 inches N/A 4 1/4 inches N/A 2 1/16 inches N/A N/A
337-3 1/2 N/A Extra Strong (XS) Steel Couplings N/A 3 1/2 N/A 4.625 inches N/A 4 3/8 inches N/A 2 1/8 inches N/A N/A
337-4 N/A Extra Strong (XS) Steel Couplings N/A 4 N/A 5.200 inches N/A 4 1/2 inches N/A 2 3/16 inches N/A N/A
337-5 N/A Extra Strong (XS) Steel Couplings N/A 5 N/A 6.296 inches N/A 4 5/8 inches N/A 2 1/4 inches N/A N/A
337-6 N/A Extra Strong (XS) Steel Couplings N/A 6 N/A 7.390 inches N/A 4 7/8 inches N/A 2 3/8 inches N/A N/A
337-8 N/A Extra Strong (XS) Steel Couplings N/A 8 N/A 9.625 inches N/A 5 1/4 inches N/A 2 9/16 inches N/A N/A
337-10 N/A Extra Strong (XS) Steel Couplings N/A 10 N/A 11.750 inches N/A 5 3/4 inches N/A 2 13/16 inches N/A N/A
337-12 N/A Extra Strong (XS) Steel Couplings N/A 12 N/A 14.000 inches N/A 6 1/8 inches N/A 3 inches N/A N/A
Unit of Measure
1