| Compatibility & Interchange: |
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| Construction: |
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| Features: |
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| Additional Information: |
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| K-Series | ISO-A Interchange Coupler (Female Threads) | |||||||||
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| Part Number |
Coupling Type |
Body Size |
Threads | Material | Length | Max. OD |
Hex | Max. Operating Pressure |
Burst Pressure |
| 2KF1 | Socket/Female | 1/4″ | 1/8″ – 27 Female NPTF | Steel | 1.89″ (47.9mm) |
1.00″ (25.4mm) |
3/4″ | 5000 PSI (345 bar) |
18270 PSI (1200 bar) |
| 2KF2 | Socket/Female | 1/4″ | 1/4″ – 18 Female NPTF | Steel | 1.89″ (47.9mm) |
1.00″ (25.4mm) |
3/4″ | 5000 PSI (345 bar) |
18270 PSI (1200 bar) |
| 2KF2-SS | Socket/Female | 1/4″ | 1/4″ – 18 Female NPTF | 316 Stainless | 1.89″ (47.9mm) |
1.00″ (25.4mm) |
3/4″ | 4,500 PSI (300 bar) |
30,500 PSI (2,100 bar) |
| 2KBF2 | Socket/Female | 1/4″ | 1/4″ – 19 Female BSPP | Steel | 1.89″ (47.9mm) |
1.00″ (25.4mm) |
3/4″ | 5,000 PSI (345 bar) |
18,270 PSI (1,200 bar) |
| 2KBF2-SS | Socket/Female | 1/4″ | 1/4″ – 19 Female BSPP | 316 Stainless | 1.89″ (47.9mm) |
1.00″ (25.4mm) |
3/4″ | 4,500 PSI (300 bar) |
30,500 PSI (2,100 bar) |
| 2KOF2 | Socket/Female | 1/4″ | 7/16″ – 20 Female ORB | Steel | 1.89″ (47.9mm) |
1.00″ (25.4mm) |
3/4″ | 5000 PSI (345 bar) |
18270 PSI (1200 bar) |
| 3KF3 | Socket/Female | 3/8″ | 3/8″ – 18 Female NPTF | Steel | 2.23″ (56.5mm) |
1.19″ (30.2mm) |
7/8″ | 4000 PSI (275 bar) |
18270 PSI (1200 bar) |
| 3KF3-SS | Socket/Female | 3/8″ | 3/8″ – 18 Female NPTF | 316 Stainless | 2.23″ (56.5mm) |
1.19″ (30.2mm) |
7/8″ | 3,750 PSI (250 bar) |
16,000 PSI (1,100 bar) |
| 3KBF3 | Socket/Female | 3/8″ | 3/8″ – 19 Female BSPP | Steel | 2.23″ (56.5mm) |
1.19″ (30.2mm) |
7/8″ | 4000 PSI (275 bar) |
18270 PSI (1200 bar) |
| 3KBF3-SS | Socket/Female | 3/8″ | 3/8″ – 19 Female BSPP | 316 Stainless | 2.23″ (56.6mm) |
1.19″ (30.2mm) |
7/8″ | 3,750 PSI (250 bar) |
16,000 PSI (1,100 bar) |
| 3KOF3 | Socket/Female | 3/8″ | 9/16″ – 18 Female ORB | Steel | 2.23″ (56.6mm) |
1.19″ (30.2mm) |
7/8″ | 4000 PSI (275 bar) |
18270 PSI (1200 bar) |
| 4KF4 | Socket/Female | 1/2″ | 1/2″ – 14 Female NPTF | Steel | 2.62″ (66.5mm) |
1.49″ (37.8mm) |
1-1/16″ | 4000 PSI (275 bar) |
16500 PSI (1100 bar) |
| 4KF4-SS | Socket/Female | 1/2″ | 1/2″ – 14 Female NPTF | 316 Stainless | 2.62″ (66.5mm) |
1.49″ (37.8mm) |
1-1/16″ | 3,750 PSI (250 bar) |
18,000 PSI (1,200 bar) |
| 4KBF4 | Socket/Female | 1/2″ | 1/2″ – 14 Female BSPP | Steel | 2.62″ (66.5mm) |
1.49″ (37.8mm) |
1-1/16″ | 4000 PSI (275 bar) |
16500 PSI (1100 bar) |
| 4KBF4-SS | Socket/Female | 1/2″ | 1/2″ – 14 Female BSPP | 316 Stainless | 2.62″ (66.5mm) |
1.49″ (37.8mm) |
1-1/16″ | 3,750 PSI (250 bar) |
18,000 PSI (1,200 bar) |
| 4KOF4 | Socket/Female | 1/2″ | 3/4″ – 16 Female ORB | Steel | 2.62″ (66.5mm) |
1.49″ (37.8mm) |
1-1/16″ | 4000 PSI (275 bar) |
16500 PSI (1100 bar) |
| 4KOF5 | Socket/Female | 1/2″ | 7/8″ – 14 Female ORB | Steel | 2.66″ (67.6mm) |
1.49″ (37.8mm) |
1-3/32″ | 4000 PSI (275 bar) |
16500 PSI (1100 bar) |
| 4KF6 | Socket/Female | 1/2″ | 3/4″ – 14 Female NPTF | Steel | 2.64″ (66.9mm) |
1.49″ (37.8mm) |
1-5/16″ | 4000 PSI (275 bar) |
16500 PSI (1100 bar) |
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| 6KF6 | Socket/Female | 3/4″ | 3/4″ – 14 Female NPTF | Steel | 3.23″ (82.0mm) |
1.86″ (47.2mm) |
1-5/16″ | 4000 PSI (275 bar) |
14800 PSI (1000 bar) |
| 6KF6-SS | Socket/Female | 3/4″ | 3/4″ – 14 Female NPTF | 316 Stainless | 3.23″ (82.0mm) |
1.86″ (47.2mm) |
1-5/16″ | 3,000 PSI (200 bar) |
12,000 PSI (800 bar) |
| 6KBF6 | Socket/Female | 3/4″ | 3/4″ – 14 Female BSPP | Steel | 3.23″ (82.0mm) |
1.86″ (47.2mm) |
1-5/16″ | 4000 PSI (275 bar) |
14800 PSI (1000 bar) |
| 6KBF6-SS | Socket/Female | 3/4″ | 3/4″ – 14 Female BSPP | 316 Stainless | 3.23″ (82.0mm) |
1.86″ (47.2mm) |
1-5/16″ | 3,000 PSI (200 bar) |
12,000 PSI (800 bar) |
| 6KOF6 | Socket/Female | 3/4″ | 1-1/16″ – 12 Female ORB | Steel | 3.23″ (82.0mm) |
1.86″ (47.2mm) |
1-5/16″ | 4000 PSI (275 bar) |
14800 PSI (1000 bar) |
| 8KF8 | Socket/Female | 1″ | 1″ – 11-1/2 Female NPTF | Steel | 3.88″ (98.6mm) |
2.10″ (53.3mm) |
1-5/8″ | 4000 PSI (275 bar) |
12400 PSI (850 bar) |
| 8KF8-SS | Socket/Female | 1″ | 1″ – 11-1/2 Female NPTF | 316 Stainless | 3.88″ (98.6mm) |
2.10″ (53.3mm) |
1-5/8″ | 3,000 PSI (200 bar) |
12,000 PSI (800 bar) |
| 8KBF8 | Socket/Female | 1″ | 1″ – 11 Female BSPP | Steel | 3.88″ (98.6mm) |
2.10″ (53.3mm) |
1-5/8″ | 4000 PSI (275 bar) |
12400 PSI (850 bar) |
| 8KBF8-SS | Socket/Female | 1″ | 1″ – 11 Female BSPP | 316 Stainless | 3.88″ (98.6mm) |
2.10″ (53.3mm) |
1-5/8″ | 3,000 PSI (200 bar) |
12,000 PSI (800 bar) |
| 8KOF8 | Socket/Female | 1″ | 1-5/16″ – 12 Female ORB | Steel | 3.88″ (98.6mm) |
2.10″ (53.3mm) |
1-5/8″ | 4000 PSI (275 bar) |
12400 PSI (850 bar) |
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| 10KF10 | Socket/Female | 1-1/4″ | 1-1/4″ – 11-1/2 Female NPT | Steel | 4.61″ (117.0mm) |
2.76″ (70.0mm) |
2″ | 3000 PSI (200 bar) |
12600 PSI (850 bar) |
| 10KBF10 | Socket/Female | 1-1/4″ | 1-1/4″ – 11 Female BSPP | Steel | 4.61″ (117.0mm) |
2.76″ (70.0mm) |
2″ | 3000 PSI (200 bar) |
12600 PSI (850 bar) |
| 12KF12 | Socket/Female | 1-1/2″ | 1-1/2″ – 11-1/2 Female NPTF | Steel | 5.24″ (133.0mm) |
3.33″ (84.5mm) |
2-3/8″ | 3000 PSI (200 bar) |
12600 PSI (850 bar) |
| 12KBF12 | Socket/Female | 1-1/2″ | 1-1/2″ – 11 Female BSPP | Steel | 5.24″ (133.0mm) |
3.33″ (84.5mm) |
2-3/8″ | 3000 PSI (200 bar) |
12600 PSI (850 bar) |
| 16KF16 | Socket/Female | 2″ | 2″ – 11-1/2 Female NPTF | Steel | 6.50″ (165.0mm) |
3.94″ (100.0mm) |
3″ | 1450 PSI (100 bar) |
5800 PSI (400 bar) |
| 16KBF16 | Socket/Female | 2″ | 2″ – 11 Female BSPP | Steel | 6.50″ (165.0mm) |
3.94″ (100.0mm) |
3″ | 1450 PSI (100 bar) |
5800 PSI (400 bar) |
| K-Series | ISO-A Interchange Plug (Female Threads) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
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| Part Number |
Coupling Type |
Body Size |
Threads | Material | Length | Max. OD |
Hex | Max. Operating Pressure |
Burst Pressure |
| K2F1 | Plug/Male | 1/4″ | 1/8″ – 27 Female NPTF | Steel | 1.22″ (31.0mm) |
0.87″ (22.1mm) |
3/4″ | 5000 PSI (345 bar) |
18270 PSI (1200 bar) |
| K2F2 | Plug/Male | 1/4″ | 1/4″ – 18 Female NPTF | Steel | 1.22″ (31.0mm) |
0.87″ (22.1mm) |
3/4″ | 5000 PSI (345 bar) |
18270 PSI (1200 bar) |
| K2F2-SS | Plug/Male | 1/4″ | 1/4″ – 18 Female NPTF | 316 Stainless | 1.22″ (31.0mm) |
0.87″ (22.1mm) |
3/4″ | 4,500 PSI (300 bar) |
30,500 PSI (2,100 bar) |
| K2BF2 | Plug/Male | 1/4″ | 1/4″ – 19 Female BSPP | Steel | 1.22″ (31.0mm) |
0.87″ (22.1mm) |
3/4″ | 5000 PSI (345 bar) |
18270 PSI (1200 bar) |
| K2BF2-SS | Plug/Male | 1/4″ | 1/4″ – 19 Female BSPP | 316 Stainless | 1.22″ (31.0mm) |
0.87″ (22.1mm) |
3/4″ | 4,500 PSI (300 bar) |
30,500 PSI (2,100 bar) |
| K2OF2 | Plug/Male | 1/4″ | 7/16″ – 20 Female ORB | Steel | 1.22″ (31.0mm) |
0.87″ (22.1mm) |
3/4″ | 5000 PSI (345 bar) |
18270 PSI (1200 bar) |
| K3F3 | Plug/Male | 3/8″ | 3/8″ – 18 Female NPTF | Steel | 1.70″ (43.2mm) |
0.97″ (24.6mm) |
7/8″ | 4000 PSI (275 bar) |
18270 PSI (1200 bar) |
| K3F3-SS | Plug/Male | 3/8″ | 3/8″ – 18 Female NPTF | 316 Stainless | 1.70″ (43.2mm) |
0.97″ (24.6mm) |
7/8″ | 3,750 PSI (250 bar) |
16,000 PSI (1,100 bar) |
| K3BF3 | Plug/Male | 3/8″ | 3/8″ – 19 Female BSPP | Steel | 1.70″ (43.2mm) |
0.97″ (24.6mm) |
7/8″ | 4000 PSI (275 bar) |
18270 PSI (1200 bar) |
| K3BF3-SS | Plug/Male | 3/8″ | 3/8″ – 19 Female BSPP | 316 Stainless | 1.70″ (43.2mm) |
0.97″ (24.6mm) |
7/8″ | 3,750 PSI (250 bar) |
16,000 PSI (1,100 bar) |
| K3OF3 | Plug/Male | 3/8″ | 9/16″ – 18 Female ORB | Steel | 1.70″ (43.2mm) |
0.97″ (24.6mm) |
7/8″ | 4000 PSI (275 bar) |
18270 PSI (1200 bar) |
| K4F4 | Plug/Male | 1/2″ | 1/2″ – 14 Female NPTF | Steel | 1.77″ (45.0mm) |
1.23″ (31.2mm) |
1-1/16″ | 4000 PSI (275 bar) |
16500 PSI (1100 bar) |
| K4F4-SS | Plug/Male | 1/2″ | 1/2″ – 14 Female NPTF | 316 Stainless | 1.77″ (45.0mm) |
1.23″ (31.2mm) |
1-1/16″ | 3,750 PSI (250 bar) |
18,000 PSI (1,200 bar) |
| K4BF4 | Plug/Male | 1/2″ | 1/2″ – 14 Female BSPP | Steel | 1.77″ (45.0mm) |
1.23″ (31.2mm) |
1-1/16″ | 4000 PSI (275 bar) |
16500 PSI (1100 bar) |
| K4BF4-SS | Plug/Male | 1/2″ | 1/2″ – 14 Female BSPP | 316 Stainless | 1.77″ (45.0mm) |
1.23″ (31.2mm) |
1-1/16″ | 3,750 PSI (250 bar) |
18,000 PSI (1,200 bar) |
| K4OF4 | Plug/Male | 1/2″ | 3/4″ – 16 Female ORB | Steel | 1.77″ (45.0mm) |
1.23″ (31.2mm) |
1-1/16″ | 4000 PSI (275 bar) |
16500 PSI (1100 bar) |
| K4OF5 | Plug/Male | 1/2″ | 7/8″ – 14 Female ORB | Steel | 1.77″ (45.0mm) |
1.23″ (31.2mm) |
1-1/16″ | 4000 PSI (275 bar) |
16500 PSI (1100 bar) |
| K4F6 | Plug/Male | 1/2″ | 3/4″ – 14 Female NPTF | Steel | 1.77″ (45.0mm) |
1.37″ (34.8mm) |
1-3/16″ | 4000 PSI (275 bar) |
16500 PSI (1100 bar) |
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| K6F6 | Plug/Male | 3/4″ | 3/4″ – 14 Female NPTF | Steel | 2.43″ (61.7mm) |
1.44″ (36.6mm) |
1-5/16″ | 4000 PSI (275 bar) |
14800 PSI (1000 bar) |
| K6F6-SS | Plug/Male | 3/4″ | 3/4″ – 14 Female NPTF | 316 Stainless | 2.43″ (61.7mm) |
1.44″ (36.6mm) |
1-5/16″ | 3,000 PSI (200 bar) |
12,000 PSI (800 bar) |
| K6BF6 | Plug/Male | 3/4″ | 3/4″ – 14 Female BSPP | Steel | 2.43″ (61.7mm) |
1.44″ (36.6mm) |
1-5/16″ | 4000 PSI (275 bar) |
14800 PSI (1000 bar) |
| K6BF6-SS | Plug/Male | 3/4″ | 3/4-14 Female BSPP | 316 Stainless | 2.43″ (61.7mm) |
1.44″ (36.6mm) |
1-5/16″ | 3,000 PSI (200 bar) |
12,000 PSI (800 bar) |
| K6OF6 | Plug/Male | 3/4″ | 1-1/16″ – 12 Female ORB | Steel | 2.43″ (61.7mm) |
1.44″ (36.6mm) |
1-5/16″ | 4000 PSI (275 bar) |
14800 PSI (1000 bar) |
| K8F8 | Plug/Male | 1″ | 1″ – 11-1/2 Female NPTF | Steel | 2.87″ (72.9mm) |
1.79″ (45.5mm) |
1-5/8″ | 4000 PSI (275 bar) |
12400 PSI (850 bar) |
| K8F8-SS | Plug/Male | 1″ | 1″ – 11-1/2 Female NPTF | 316 Stainless | 2.87″ (72.9mm) |
1.79″ (45.5mm) |
1-5/8″ | 3,000 PSI (200 bar) |
12,000 PSI (800 bar) |
| K8BF8 | Plug/Male | 1″ | 1″ – 11 Female BSPP | Steel | 2.87″ (72.9mm) |
1.79″ (45.5mm) |
1-5/8″ | 4000 PSI (275 bar) |
12400 PSI (850 bar) |
| K8BF8-SS | Plug/Male | 1″ | 1″ – 11 Female BSPP | 316 Stainless | 2.87″ (72.9mm) |
1.79″ (45.5mm) |
1-5/8″ | 3,000 PSI (200 bar) |
12,000 PSI (800 bar) |
| K8OF8 | Plug/Male | 1″ | 1-5/16″ – 12 Female ORB | Steel | 2.87″ (72.9mm) |
1.79″ (45.5mm) |
1-5/8″ | 4000 PSI (275 bar) |
12400 PSI (850 bar) |
| K10F10 | Plug/Male | 1-1/4″ | 1-1/4″ – 11-1/2 Female NPTF | Steel | 2.95″ (75.0mm) |
2.31″ (58.7mm) |
2″ | 3000 PSI (200 bar) |
12600 PSI (850 bar) |
| K10BF10 | Plug/Male | 1-1/4″ | 1-1/4″ – 11 Female BSPP | Steel | 2.95″ (75.0mm) |
2.31″ (58.7mm) |
2″ | 3000 PSI (200 bar) |
12600 PSI (850 bar) |
| K12F12 | Plug/Male | 1-1/2″ | 1-1/2″ – 11-1/2 Female NPTF | Steel | 3.29″ (83.5mm) |
2.74″ (69.6mm) |
2-3/8″ | 3000 PSI (200 bar) |
12600 PSI (850 bar) |
| K12BF12 | Plug/Male | 1-1/2″ | 1-1/2″ – 11 Female BSPP | Steel | 3.29″ (83.5mm) |
2.74″ (69.6mm) |
2-3/8″ | 3000 PSI (200 bar) |
12600 PSI (850 bar) |
| K16F16 | Plug/Male | 2″ | 2″ – 11-1/2 Female NPTF | Steel | 4.13″ (105.0mm) |
3.46″ (87.9mm) |
3″ | 1450 PSI (100 bar) |
5800 PSI (400 bar) |
| K16BF16 | Plug/Male | 2″ | 2″ – 11 Female BSPP | Steel | 4.13″ (105.0mm) |
3.46″ (87.9mm) |
3″ | 1450 PSI (100 bar) |
5800 PSI (400 bar) |










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