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Straight Couplings Reducer Couplings

A complete range of couplings is offered for flexibility in going from tube to tube and from tube to pipe. 
      All standard coupling bodies are made from high tensile 316 stainless steel. Standard tubing glands and collars (sleeves) are provided with adapters unless otherwise specified.


Taper Seal Straight Couplings

Catalog No. Pressure
Rating
psi		 Connections A B Length Hex
Size
15-21AF1 15000 1/16" O.D. TUBING AF1 AF1 1" 3/8"
15-21AF2 15000 1/8" O.D. TUBING AF2 AF2 1 1/8" 3/4"
10-21AF4 10,000 1/4" O.D. TUBING AF4 AF4 1 3/4" 1"
10-21AF6 10,000 3/8" O.D. TUBING AF6 AF6 1 3/4" 1"
 

Female Taper Seal to Female NPT

Catalog No. Pressure
Rating
psi		 Connections A B Length Hex
Size
15-21AF1NFA 15000 1/16" O.D. TUBE TO 1/8" NPT AF1 NFA 1 1/8" 5/8"
15-21AF1NFB 15000 1/16" O.D. TUBE TO 1/4" NPT AF1 NFB 1 1/8" 3/4"
15-21AF1NFC 15000 1/16" O.D. TUBE TO 3/8" NPT AF1 NFC 1 3/8" 1"
15-21AF1NFD 15000 1/16" O.D. TUBE TO 1/2" NPT AF1 NFD 1 3/4" 1 1/8"
15-21AF2NFA 15000 1/8" O.D. TUBE TO 1/8" NPT AF2 NFA 1 1/4" 5/8"
15-21AF2NFB 15000 1/8" O.D. TUBE TO 1/4" NPT AF2 NFB 1 1/4" 3/4"
15-21AF2NFC 15000 1/8" O.D. TUBE TO 3/8" NPT AF2 NFC 1 1/2" 1"
15-21AF2NFD 15000 1/8" O.D. TUBE TO 1/2" NPT AF2 NFD 1 3/4" 1 1/8"
10-21AF4NFA 10,000 1/4" O.D. TUBE TO 1/8" NPT AF4 NFA 1 5/8" 1"
10-21AF4NFB 10,000 1/4" O.D. TUBE TO 1/4" NPT AF4 NFB 1 3/4" 1"
10-21AF4NFC 10,000 1/4" O.D. TUBE TO 3/8" NPT AF4 NFC 1 7/8" 1"
10-21AF4NFD 10,000 1/4" O.D. TUBE TO 1/2" NPT AF4 NFD 1 7/8" 1 1/8"
10-21AF4NFF 10,000 1/4" O.D. TUBE TO 3/4" NPT AF4 NFF 2 3/8" 1 3/8"
10-21AF4NFH 10,000 1/4" O.D. TUBE TO 1" NPT AF4 NFH 2 5/8" 1 7/8"
10-21AF6NFA 10,000 3/8" O.D. TUBE TO 1/8" NPT AF6 NFA 1 5/8" 1"
10-21AF6NFB 10,000 3/8" O.D. TUBE TO 1/4" NPT AF6 NFB 1 3/4" 1"
10-21AF6NFC 10,000 3/8" O.D. TUBE TO 3/8" NPT AF6 NFC 1 7/8" 1"
10-21AF6NFD 10,000 3/8" O.D. TUBE TO 1/2" NPT AF6 NFD 2 1/8" 1 1/8"
10-21AF6NFF 10,000 3/8" O.D. TUBE TO 3/4" NPT AF6 NFF 2 3/8" 1 3/8"
10-21AF6NFH 10,000 3/8" O.D. TUBE TO 1" NPT AF6 NFH 2 5/8" 1 7/8"
 

Female Taper Seal to Female Female High Pressure

Catalog No. Pressure
Rating
psi		 Connections A B Length Hex
Size
15-21AF1HF2 15000 1/16” O.D. TUBE TO 1/8” H.P. AF1 HF2 1 1/8” 5/8”
15-21AF1HF4 15000 1/16” O.D. TUBE TO 1/4” H.P. AF1 HF4 1 1/4” 3/4”
15-21AF1HF6 15000 1/16” O.D. TUBE TO 3/8” H.P. AF1 HF6 1 3/8” 1”
15-21AF1HF9 15000 1/16” O.D. TUBE TO 9/16” H.P. AF1 HF9 2 3/8” 1 3/8”
15-21AF2HF2 15000 1/8” O.D. TUBE TO 1/8” H.P. AF2 HF2 1 1/8” 3/4”
15-21AF2HF4 15000 1/8” O.D. TUBE TO 1/4” H.P. AF2 HF4 1 1/4” 3/4”
15-21AF2HF6 15000 1/8” O.D. TUBE TO 3/8” H.P. AF2 HF6 1 7/8” 1”
15-21AF2HF9 15000 1/8” O.D. TUBE TO 9/16” H.P. AF2 HF9 2 3/8” 1 3/8”
10-21AF4HF2 10,000 1/4” O.D. TUBE TO 1/8” H.P. AF4 HF2 1 3/8” 1”
10-21AF4HF4 10,000 1/4” O.D. TUBE TO 1/4” H.P. AF4 HF4 1 1/2” 1”
10-21AF4HF6 10,000 1/4” O.D. TUBE TO 3/8” H.P. AF4 HF6 1 7/8” 1”
10-21AF4HF9 10,000 1/4” O.D. TUBE TO 9/16” H.P. AF4 HF9 2 3/8” 1 3/8”
10-21AF6HF2 10,000 1/4” O.D. TUBE TO 1/8” H.P. AF6 HF2 1 1/2” 1”
10-21AF6HF4 10,000 3/8” O.D. TUBE TO 1/4” H.P. AF6 HF4 1 3/4” 1”
10-21AF6HF6 10,000 3/8” O.D. TUBE TO 3/8” H.P. AF6 HF6 1 7/8” 1”
10-21AF6HF9 10,000 3/8” O.D. TUBE TO 9/16” H.P. AF6 HF9 2 3/8” 1 3/8”
 

Taper Seal Reducer Couplings

Catalog No. Pressure
Rating
psi		 Connections A B Length Hex
Size
15-21AF1AF2 15000 1/16” O.D. TO 1/8” O.D. TUBE AF1 AF2 1 1/8” 5/8”
10-21AF1AF4 10,000 1/16” O.D. TO 1/4” O.D. TUBE AF1 AF4 1 3/8” 1”
10-21AF1AF6 10,000 1/16” O.D. TO 3/8” O.D. TUBE AF1 AF6 1 3/8” 1”
10-21AF2AF4 10,000 1/8” O.D. TO 1/4” O.D. TUBE AF2 AF4 1 1/2” 1”
10-21AF2AF6 10,000 1/8” O.D. TO 3/8” O.D. TUBE AF2 AF6 1 1/2” 1”
10-21AF4AF6 10,000 1/4” O.D. TO 3/8” O.D. TUBE AF4 AF6 1 3/4” 1”
 

Female Medium Pressure to Female Medium Pressure

Catalog No. Pressure
Rating
psi		 Connections A B Length Hex
Size
20-21LF4LF6 20,000 1/4” M.P. to 3/8” M.P. LF4 LF6 1 3/4” 3/4”
20-21LF4LF9 20,000 1/4” M.P. to 9/16” M.P. LF4 LF9 2 1/8” 1"
20-21LF6LF9 20,000 3/8” M.P. to 9/16” M.P. LF6 LF9 2 1/8” 1"
20-21LF4LF12 20,000 1/4” M.P. to 3/4” M.P. LF4 LF12 2 1/2” 1 3/8”
20-21LF6LF12 20,000 3/8” M.P. to 3/4” M.P. LF6 LF12 2 1/2” 1 3/8”
20-21LF9LF12 20,000 9/16” M.P. to 3/4” M.P. LF9 LF12 2 1/2” 1 3/8”
20-21LF4LF16 20,000 1/4” M.P. to 1" M.P. LF4 LF16 3 1/2” 1 3/4”
20-21LF6LF16 20,000 3/8” M.P. to 1" M.P. LF6 LF16 3 1/2” 1 3/4”
20-21LF9LF16 20,000 9/16” M.P. to 1" M.P. LF9 LF16 3 1/2” 1 3/4”
20-21LF12LF16 20,000 3/4” M.P. to 1" M.P. LF12 LF16 3 1/2” 1 3/4”
 

Female Medium Pressure to Female Pipe

Catalog No. Pressure
Rating
psi		 Connections A B Length Hex
Size
20-21LF4NFA 15000 1/4" M.P. to 1/8" NPT FEMALE LF4 NFA 1 5/8" 3/4"
20-21LF4NFB 15000 1/4" M.P. to 1/4" NPT FEMALE LF4 NFB 1 5/8" 3/4"
20-21LF4NFC 15000 1/4" M.P. to 3/8" NPT FEMALE LF4 NFC 2" 1"
20-21LF4NFD 15000 1/4" M.P. to 1/2" NPT FEMALE LF4 NFD 2" 1 1/8"
10-21LF4NFF 10,000 1/4" M.P. to 3/4" NPT FEMALE LF4 NFF 2 3/8" 1 3/8"
10-21LF4NFH 10,000 1/4" M.P. to 1" NPT FEMALE LF4 NFH 2 5/8" 1 7/8"
20-21LF6NFA 15000 3/8" M.P. to 1/8" NPT FEMALE LF6 NFA 1 3/4" 3/4"
20-21LF6NFB 15000 3/8" M.P. to 1/4" NPT FEMALE LF6 NFB 1 3/4" 3/4"
20-21LF6NFC 15000 3/8" M.P. to 3/8" NPT FEMALE LF6 NFC 2 1/8" 1"
20-21LF6NFD 15000 3/8" M.P. to 1/2" NPT FEMALE LF6 NFD 2 1/8" 1 1/8"
10-21LF6NFF 10,000 3/8" M.P. to 3/4" NPT FEMALE LF6 NFIF 2 3/8" 1 3/8"
10-21LF6NFH 10,000 3/8" M.P. to 1" NPT FEMALE LF6 NFH 2 3/4" 1 7/8"
20-21LF9NFA 15000 9/16" M.P. to 1/8" NPT FEMALE LF9 NFA 2 1/8" 1"
20-21LF9NFB 15000 9/16" M.P. to 1/4" NPT FEMALE LF9 NFB 2 1/8" 1"
20-21LF9NFC 15000 9/16" M.P. to 3/8" NPT FEMALE LF9 NFC 2 1/8" 1"
20-21LF9NFD 15000 9/16" M.P. to 1/2" NPT FEMALE LF9 NFD 2 1/4" 1 1/8"
10-21LF9NFF 10,000 9/16" M.P. to 3/4" NPT FEMALE LF9 NFF 2 1/2" 1 3/8"
10-21LF9NFH 10,000 9/16" M.P. to 1" NPT FEMALE LF9 NFH 2 7/8" 1 7/8"
20-21LF12NFA 15000 3/4" M.P. to 1/8" NPT FEMALE LF12 NFA 2 1/2" 1 3/8"
20-21LF12NFB 15000 3/4" M.P. to 1/4" NPT FEMALE LF12 NFB 2 1/2" 1 3/8"
20-21LF12NFC 15000 3/4" M.P. to 3/8" NPT FEMALE LF12 NFC 2 1/2" 1 3/8"
20-21LF12NFD 15000 3/4" M.P. to 1/2" NPT FEMALE LF12 NFD 2 1/2" 1 3/8"
10-21LF12NFF 10,000 3/4" M.P. to 3/4" NPT FEMALE LF12 NFF 2 3/4" 1 1/2"
10-21LF12NFH 10,000 3/4" M.P. to 1" NPT FEMALE LF12 NFH 3" 1 7/8"
20-21LF16NFA 15000 1" M.P. to 1/8" NPT FEMALE LF16 NFA 3" 1 3/4"
20-21LF16NFB 15000 1" M.P. to 1/4" NPT FEMALE LF16 NFB 3" 1 3/4"
20-21LF16NFC 15000 1" M.P. to 3/8" NPT FEMALE LF16 NFC 3" 1 3/4"
20-21LF16NFD 15000 1" M.P. to 1/2" NPT FEMALE LF16 NFD 3" 1 3/4"
10-21LF16NFF 10,000 1" M.P. to 3/4" NPT FEMALE LF16 NFF 3 1/4" 1 3/4"
10-21LF16NFH 10,000 1" M.P. to 1" NPT FEMALE LF16 NFH 3 1/4" 1 3/4"
 

Medium Pressure Straight Couplings

Catalog No. Pressure
Rating
psi		 Connections A B Length Hex
Size
20-21LF4 20,000 1/4" O.D. TUBING LF4 LF4 1 9/16" 5/8"
20-21LF6 20,000 3/8" O.D.TUBING LF6 LF6 1 3/4" 3/4"
20-21LF9 20,000 9/16" O.D. TUBING LF9 LF9 2 1/8" 1
20-21LF12 20,000 3/4" O.D. TUBING LF12 LF12 2 1/2" 1 3/8"
20-21LF16 20,000 1" O.D. TUBING LF16 LF16 3 1/2" 1 3/4"
 

Female Medium Pressure to Female High Pressure

Catalog No. Pressure
Rating
psi		 Connections A B Length Hex
Size
20-21LF4HF4 20,000 1/4" M.P. to 1/4" H.P. LF4 HF4 1 5/8" 3/4"
20-21LF4HF6 20,000 1/4" M.P. to 3/8" H.P. LF4 HF6 1 7/8" 1"
20-21LF4HF9 20,000 1/4" M.P. to 9/16" H.P. LF4 HF9 2 3/8" 1 3/8"
20-21LF6HF4 20,000 3/8" M.P. to 1/4" H.P. LF6 HF4 1 3/4" 3/4"
20-21LF6HF6 20,000 3/8" M.P. to 3/8" H.P. LF6 HF6 1 7/8" 1"
20-21LF6HF9 20,000 3/8" M.P. to 9/16" H.P. LF6 HF9 2 3/8" 1 3/8"
20-21LF9HF4 20,000 9/16" M.P. to 1/4" H.P. LF9 HF4 2 1/8" 1"
20-21LF9HF6 20,000 9/16" M.P. to 3/8” H.P. LF9 HF6 2 1/8" 1"
20-21LF9HF9 20,000 9/16" M.P. to 9/16” H.P. LF9 HF9 2 3/8" 1 3/8"
20-21LF12HF4 20,000 3/4" M.P. to 1/4” H.P. LF12 HF4 2 1/2" 1 3/8"
20-21LF12HF6 20,000 3/4" M.P. to 3/8” H.P. LF12 HF6 2 1/2" 1 3/8"
20-21LF12HF9 20,000 3/4" M.P. to 9/16” H.P. LF12 HF9 21/2" 1 3/8"
*20-21HF16HF4 20,000 1" M.P. to 1/4” H.P HF16 HF4 31/2" 1 3/4"
*20-21HF16HF6 20,000 1" M.P. to 3/8” H.P HF16 HF6 31/2" 1 3/4"
*20-21HF16HF9 20,000 1" M.P. to 9/16” H.P. HF16 HF9 3 1/2" 1 3/4"
 

High Pressure Straight Couplings

Catalog No. Pressure
Rating
psi		 Connections A B Length Hex
Size
60-21HF2 60,000 1/8" O.D. TUBING HF2 HF2 1 1/8" 3/4"
60-21HF4 60,000 1/4" O.D. TUBING HF4 HF4 1 3/4" 1"
60-21HF6 60,000 3/8" O.D. TUBING HF6 HF6 2" 1"
60-21HF9 60,000 9/16" O.D. TUBING HF9 HF9 2 3/8" 1 3/8"
30-21HF16 30,000 1" O.D. TUBING HF16 HF16 3 1/2" 1 3/4"
 

High Pressure Reducer Couplings

Catalog No. Pressure
Rating
psi		 Connections A B Length Hex
Size
60-21HF2HF4 60,000 1/8" O.D. TO 1/4" O.D. TUBE HF2 HF4 1 1/4" 3/4"
60-21HF2HF6 60,000 1/8" O.D. TO 3/8" O.D. TUBE HF2 HF6 1 5/8" 1"
60-21HF2HF9 60,000 1/16" O.D. TO 9/16" O.D. TUBE HF2 HF9 1 3/4" 1 3/8"
60-21HF4HF6 60,000 1/4" O.D. TO 3/8" O.D. TUBE HF4 HF6 1 5/8" 1"
60-21HF4HF9 60,000 1/4" O.D. TO 9/16" O.D. TUBE HF4 HF9 1 3/4" 1 3/8"
60-21HF6HF9 60,000 3/8" O.D. TO 9/16" O.D. TUBE HF6 HF9 2" 1 3/8"
 

Female High Pressure to Female NPT Pipe

Catalog No. Pressure
Rating
psi		 Connections A B Length Hex
Size
30-21HF2NFA 15000 1/8" O.D. TUBE TO 1/8” NPT HF2 NFA 1 1/2" 3/4"
30-21HF2NFB 15000 1/8" O.D. TUBE TO 1/4” NPT HF2 NFB 1 1/2" 3/4"
30-21HF2NFC 15000 1/8" O.D. TUBE TO 3/8” NPT HF2 NFC 1 1/2" 1"
30-21HF2NFD 15000 1/8" O.D. TUBE TO 1/2” NPT HF2 NFD 1 3/4" 1 1/8"
10-21HF2NFF 10,000 1/8" O.D. TUBE TO 3/4” NPT HF2 NFF 2" 1 3/8"
10-21HF2NFH 10,000 1/8" O.D. TUBE TO 1” NPT HF2 NFH 2 1/2" 1 3/4"
30-21HF4NFA 15000 1/4" O.D. TUBE TO 1/8” NPT HF4 NFA 1 1/2" 1"
30-21HF4NFB 15000 1/4" O.D. TUBE TO 1/4” NPT HF4 NFB 1 1/2" 1"
30-21HF4NFC 15000 1/4" O.D. TUBE TO 3/8” NPT HF4 NFC 1 7/8" 1"
30-21HF4NFD 15000 1/4" O.D. TUBE TO 1/2” NPT HF4 NFD 1 7/8" 1 1/8"
10-21HF4NFF 10,000 1/4" O.D. TUBE TO 3/4” NPT HF4 NFF 2" 1 3/8"
10-21HF4NFH 10,000 1/4" O.D. TUBE TO 1” NPT HF4 NFH 2 1/2" 1 3/4"
30-21HF6NFA 15000 3/8" O.D. TUBE TO 1/8” NPT HF6 NFA 1 7/8" 1"
30-21HF6NFB 15000 3/8" O.D. TUBE TO 1/4” NPT HF6 NFB 1 7/8" 1"
30-21HF6NFC 15000 3/8" O.D. TUBE TO 3/8” NPT HF6 NFC 1 7/8" 1"
30-21HF6NFD 15000 3/8" O.D. TUBE TO 1/2” NPT HF6 NFD 1 7/8" 1 1/8"
10-21HF6NFF 10,000 3/8" O.D. TUBE TO 3/4” NPT HF6 NFF 2 1/8" 1 3/8"
10-21HF6NFH 10,000 3/8" O.D. TUBE TO 1” NPT HF6 NFH 2 5/8" 1 7/8"
30-21HF9NFA 15000 9/16" O.D. TUBE TO 1/8” NPT HF9 NFA 2 3/8" 1 3/8"
30-21HF9NFB 15000 9/16" O.D. TUBE TO 1/4” NPT HF9 NFB 2 3/8" 1 3/8"
30-21HF9NFC 15000 9/16" O.D. TUBE TO 3/8” NPT HF9 NFC 2 3/8" 1 3/8"
30-21HF9NFD 15000 9/16" O.D. TUBE TO 1/2” NPT HF9 NFD 2 3/8" 1 3/8"
10-21HF9NFF 10,000 9/16" O.D. TUBE TO 3/4” NPT HF9 NFF 2 3/8" 1 3/8"
10-21HF9NFH 10,000 9/16" O.D. TUBE TO 1” NPT HF9 NFH 2 5/8" 2"
 

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