Hart Industries

     
   3000 lb. Threaded FNPT Unions
   3000 lb. Threaded MNPT Unions
   3000 lb. Socketweld Pipe Unions
   3000 lb. Socketweld Tube Unions
   3000 lb. Buttweld Pipe Unions
   Copper Sweat Tube Unions
   6000 lb. Threaded Pipe Unions
   6000 lb. Socketweld Tube Unions
   6000 lb. Buttweld Pipe Unions
   Orifice Unions
   Dielectric Insulated Unions
   Steam Unions
   Handlebar, Lug-Nut Unions
   O-Ring Information
   How to Order © 
   Union Assembly Video

 
  
Female Threaded Unions

   

3000 lb. Female Threaded FNPT Fig. 3131
6000 lb. Female Threaded FNPT Fig. 6161
Threaded Unions
  • The most popular union in the industry for general purpose joining of piping systems
  • Flat faced design
  • Size range: 1/8" to 3"
  • Full flow-waterway bore
  • Zero leakage
  • Makes and breaks repeatedly
  • All HART Industrial Unions are precision machined
  • Viton O-Ring standard, Buna N, Teflon, EPDM, Neoprene also available (call for compatibility)

            Click Here to View 3131 Technical Data Sheet PDF

           Click Here to View 6161 Technical Data Sheet PDF

          

Standard Assemblies
A105 Carbon Steel
304 Stainless Steel
316 Stainless Steel
Alloys - see materials list
under how to order

 
 
 

Dimensions

3000 psi W.O.G., Cold, Non Shock
FIGURE NO A FNPT B C HEX D E TAIL-PIECE F THREAD-PIECE WGT (LBS)
3131-0

1/8" - 27

1.660 1-3/8

3/4

0.785 0.875

1/2

3131-1

1/4" - 18

1.660 1-3/8 3/4 0.785 0.875

1/2

3131-2

3/8" - 18

1.800 1-1/2 7/8 0.863 0.937

1/2

3131-3

1/2" - 14

2.035 1-7/8 1-1/8 0.935 1.100

1

3131-4

3/4" - 14

2.148 2-1/8 1-3/8 1.023 1.125

1-1/4

3131-5

1"-  11 1/2

2.570 2-1/2 1-3/4 1.258 1.312

2

3131-6

1 1/4" - 11 1/2

2.822 3 2-1/8 1.385 1.437

3

3131-7

1 1/2" - 11 1/2

3.072 3-3/8 2-3/8 1.510 1.562

4

3131-8

2" - 11 1/2

3.259 3-7/8 2-7/8 1.572 1.687

5

3131-9

2 1/2" - 8

3.635 4-7/8 3-1/2 1.760 1.875

8-1/2

3131-10

3" - 8

4.135 5-1/2

4

2.010 2.125

9


 

Dimensions

6000 psi W.O.G., Cold, Non Shock
FIGURE NO A FNPT B C HEX D E TAIL-PIECE F THREAD-PIECE WGT (LBS)
6161-0

1/8" - 27

1.660 1-3/8

3/4

0.785 0.875

1/2

6161-1

1/4" - 18

1.800 1-1/2 7/8 0.863 0.937

1/2

6161-2

3/8" - 18

2.035 1-7/8 1-1/8 0.935 1.100

1

6161-3

1/2" - 14

2.148 2-1/8 1-3/8 1.023 1.125

1-1/4

6161-4

3/4" - 14

2.570 2-1/2 1-3/4 1.258 1.312

2

6161-5

1" - 11 1/2

2.822 3 2-1/8 1.385 1.437

3

6161-6

1 1/4" - 11 1/2

3.072 3-3/8 2-3/8 1.510 1.562

4

6161-7

1 1/2" - 11 1/2

3.259 3-7/8 2-7/8 1.572 1.687

5

6161-8

2" - 11 1/2

3.635 4-7/8 3-1/2 1.760 1.875

8-1/2

6161-9

2 1/2" - 8

4.135 5-1/2 4 2.010 2.125

9

 6161-10

3" - 8

4.875 6-7/8

5

2.375 2.500

15





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