High Flow Hydraulic Quick Couplers | Parker ST Series Couplers
![]() |
COUPLERS Female Pipe Thread Sizes 1/8" - 1 1/2" Go to Parker ST Series Nipples Select Another Hydraulic QC |
Specifications for Parker ST Female Pipe Thread Couplers
Body Size (in.) |
Part No. Brass |
Part No. Type 303 Stainless |
Thread Size NPTF |
Dimensions (in.) |
||
Overall Length A |
Wrench Flats B |
Largest Diameter C |
||||
1/8 |
BST-1 |
SST-1 |
1/8-27 |
1.06 |
0.56 |
0.69 |
1/4 |
BST-2 |
SST-2 |
1/4-18 |
1.54 |
0.81 |
0.94 |
3/8 |
BST-3 |
SST-3 |
3/8-18 |
1.59 |
1.00 |
1.16 |
1/2 |
BST-4 |
SST-4 |
1/2-14 |
1.98 |
1.13 |
1.30 |
3/4 |
BST-6 |
SST-6 |
3/4-14 |
2.15 |
1.44 |
1.66 |
1 |
BST-8 |
SST-8 |
1-11 1/2 |
2.43 |
1.75 |
2.02 |
1-1/4 |
BST-10 |
– |
1 1/4-11 1/2 |
2.44 |
2.00 |
2.51 |
1-1/2 |
BST-12 |
– |
1 1/2-11 1/2 |
2.88 |
2.50 |
3.00 |
![]() |
COUPLERS Male Pipe Thread Sizes 1/8" - 1" Go to Parker ST Series Nipples Select Another Hydraulic QC |
Specifications for Parker ST Male Pipe Thread Couplers
Body Size (in.) |
Part No. Brass |
Part No. Type 303 Stainless |
Thread Size NPTF |
Dimensions (in.) |
||
Overall Length A |
Wrench Flats B |
Largest Diameter C |
||||
1/8 |
BST-1M |
SST-1M |
1/8-27 |
1.06 |
0.56 |
0.69 |
1/4 |
BST-2M |
SST-2M |
1/4-18 |
1.69 |
0.81 |
0.81 |
3/8 |
BST-3M |
SST-3M |
3/8-18 |
1.75 |
1.00 |
1.16 |
1/2 |
BST-4M |
SST-4M |
1/2-14 |
1.94 |
1.13 |
1.30 |
3/4 |
BST-6M |
SST-6M |
3/4-14 |
2.17 |
1.44 |
1.66 |
1 |
BST-8M |
SST-8M |
1-11 1/2 |
2.53 |
1.75 |
2.02 |
Body Size (in.) |
1/8 |
1/4 |
3/8 |
1/2 |
3/4 |
1 |
1 1/4 |
1 1/2 |
Rated Pressure (PSI) |
||||||||
Brass Cplr/Npl 2500 |
2500 |
5200 |
2700 |
2200 |
1700 |
1200 |
1700 |
1400 |
Brass Cplr/Steel Npl 2600 |
2600 |
5500 |
3500 |
2700 |
2700 |
2000 |
– |
– |
SS Cplr/Npl 4200 |
4200 |
6700 |
5500 |
3000 |
3000 |
1700 |
– |
– |
Rated Flow 3 |
3 |
6 |
12 |
12 |
28 |
50 |
76 |
100 |
Temperature Range (std seals) |
-40° to +250°F |
Orders & Quotes
![]() |
![]() |
![]() |
