steam couplings

"Boss" Ground Joint Seal Couplings

"Boss" ground joint seal couplings originated from the U.S., or "Boss" couplings, is suitable for steam works.

"Boss" couplings consist of hose stems, wing nuts, spud adapters and interlocking clamps.

Learn more features of our "Boss" ground joint seal couplings...

"Boss" Complete Coupling

boss complete coupling
Boss Complete Coupling Complete coupling of hose stem, wing nut thread and spud adapter
Thread Type NPT or BSP-Parallel
Core Material Plated steel
Temperature Recommended for steam service up to 232°C (450°F)
boss complete coupling
Size
inch
Ø mm Thread
Type
Core
Material
Article Nr.
1/2 14 BSP-P Pl. steel
081 113
3/4 20 BSP-P Pl. steel
081 114
1 26.5 BSP-P Pl. steel
081 115
32 BSP-P Pl. steel
081 116
38 BSP-P Pl. steel
081 117
2 53.5 BSP-P Pl. steel
081 118
1/2 14 NPT Pl. steel
081 113.3
3/4 20 NPT Pl. steel
081 114.3
1 26.5 NPT Pl. steel
081 115.3
32 NPT Pl. steel
081 116.3
2 53.5 NPT Pl. steel
081 118.3

"Boss" Hose Stem

boss hose stem
Boss Hose Stem Boss hose stem by round metal-to-metal sealing face
Core Material Plated steel
Temperature Recommended for steam service up to 232°C (450°F)
boss hose stem
Size
inch
Ø mm Core
Material
Article Nr.
1/2 14 Pl. steel
081 123
3/4 20 Pl. steel
081 124
1 26.5 Pl. steel
081 125
32 Pl. steel
081 126
38 Pl. steel
081 127
2 53.5 Pl. steel
081 128

"Boss" Male Stem

boss male stem
Boss Male Stem Boss hose stem by male thread
Thread Type NPT or BSP-Tapered
Core Material Plated steel
Temperature Recommended for steam service up to 232°C (450°F)
Size
inch
Ø mm Thread
Type
Core
Material
Article Nr.
3/8 - BSP-T Pl. steel
081 212
1/2 8 BSP-T Pl. steel
081 213
3/4 10 BSP-T Pl. steel
081 214
1 13 BSP-T Pl. steel
081 215
19 BSP-T Pl. steel
081 216
25 BSP-T Pl. steel
081 217
2 - BSP-T Pl. steel
081 218
3/8 - NPT Pl. steel
081 213.5
1/2 8 NPT Pl. steel
081 213.5
3/4 10 NPT Pl. steel
081 214.5
1 13 NPT Pl. steel
081 215.5
19 NPT Pl. steel
081 216.5
25 NPT Pl. steel
081 217.5
2 - NPT Pl. steel
081 218.5

"Boss" Female Spud

boss female spud
Boss Female Spud Boss spud with screw-on male thread by female thread outlet
Thread Type Male NPT by female NPSM
Core Material Plated steel
Temperature Recommended for steam service up to 232°C (450°F)
boss female spud
Size
inch
Core
Material
Article Nr.
1/2 NPT × 1 NPSM Pl. steel
081 133
3/4 NPT × 1½ NPSM Pl. steel
081 134
1 NPT × 1½ NPSM Pl. steel
081 135
1¼ NPT × 2 NPSM Pl. steel
081 136
1½ NPT × 2 NPSM Pl. steel
081 137
2 NPT × 2½ NPSM Pl. steel
081 138

"Boss" Male Spud

boss male spud
Boss Male Spud Boss spud with screw-on male thread by male thread outlet
Thread Type Male NPT
Core Material Plated steel
Temperature Recommended for steam service up to 232°C (450°F)
Size
inch
Core
Material
Article Nr.
3/4 NPT Pl. steel
081 153
1 NPT Pl. steel
081 154
1¼ NPT Pl. steel
081 155
1½ NPT Pl. steel
081 156
2 NPT Pl. steel
081 157

"Boss" Wing Nut Thread

boss wing nut thread
Boss Wing Nut Thread Boss wing nut by female thread NPSM
Thread Type Female NPSM
Core Material Plated steel
Temperature Recommended for steam service up to 232°C (450°F)
boss wing nut thread
Size
inch
Thread Core
Material
Article Nr.
1/2 1 NPSM Pl. steel
081 143
3/4 1½ NPSM Pl. steel
081 144
1 1½ NPSM Pl. steel
081 145
2 NPSM Pl. steel
081 146
2 NPSM Pl. steel
081 147
2 2½ NPSM Pl. steel
081 148

"Boss" Interlocking Clamps

boss interlocking clamps
Boss Interlocking Clamps Boss clamps with gripping fingers, 2 or 4 bolts attached
Core Material Plated carbon steel
Bolts Nuts Material Carbon steel #4.8 or #8.8
Temperature Recommended for steam service up to 232°C (450°F)
Size
inch
Range
inch
Bolts
set
Carbon
Steel
3/8 11/16 - 7/8 2 × 4.8
082 000
1/2 1 - 13/16 2 × 4.8
082 001
1/2 15/16 - 11/16 2 × 4.8
082 004
3/4 11/8 - 15/16 2 × 4.8
082 002
3/4 1½ - 111/16 2 × 4.8
082 007
1 15/16 - 1½ 2 × 4.8
082 003
1 111/16 - 115/16 4 × 4.8
082 012
21/8 - 23/8 4 × 4.8
082 019
2¼ - 29/16 4 × 4.8
082 024
2 23/4 - 31/16 4 × 4.8
082 030
3 - 4 × 4.8
082 040
4 25/16 - 25/8 4 × 4.8
082 047
1/2 15/16 - 11/16 2 × 8.8
082 004.1
3/4 1½ - 111/16 2 × 8.8
082 007.1
1 111/16 - 115/16 4 × 8.8
082 012.1
21/8 - 23/8 4 × 8.8
082 019.1
2¼ - 29/16 4 × 8.8
082 024.1
2 23/4 - 21/16 4 × 8.8
082 030.1