Parker Hannifin Corporation
Quick Coupling Division
Minneapolis, MN 55427
15
Quick Coupling Products
High Flow Couplings
ST Series
1
5
3
4
2
Features
1.
The smooth, open bore with no valving in either half offers
minimal pressure drop and allows easy cleaning in
applications where the same lines are used for more than
one media.
2.
ST couplers and nipples are machined from solid barstock,
providing a quality coupling that is durable. ST couplers
are available in brass and 303 and 316 stainless steel as
standard product materials.
3.
ST nipples are available in 303 stainless steel,
316
stainless steel, brass, and carbon steel.
4.
The ST series is an interchange coupling that
dimensionally and functionally interchanges with similar
couplings made by other manufacturers.
Couplers
Female Pipe Thread
Male Pipe Thread
A
C
B
A
C
B
Body
Part
Part No.
Part No.
Thread
Dimensions (in.)
Size
No.
Wt. (LB.) Type 303 Wt. (LB.) Type 316 Wt. (LB.)
Size Overall
Wrench Largest
(
in.)
Brass P/Piece Stainless P/Piece Stainless P/Piece NPTF Length Flats Diameter
A
B
C
1/8
BST-1 0.06 SST-1 0.05 SSST-1Y* 0.05 1/8-27 1.06 0.56 0.69
1/4
BST-2 0.17 SST-2 0.15 SSST-2Y* 0.15 1/4-18 1.54 0.81 0.94
3/8
BST-3 0.26 SST-3 0.24 SSST-3Y* 0.24 3/8-18 1.59 1.00 1.16
1/2
BST-4 0.59 SST-4 0.37
–
–
1/2-14 1.98 1.13 1.30
3/4
BST-6 0.62 SST-6 0.57
–
–
3/4-14 2.15 1.44 1.66
1
BST-8 0.99 SST-8 0.93
–
– 1-11 1/2 2.43 1.75 2.02
1-1/4
BST-10 1.38
–
–
–
– 1 1/4-11 1/2 2.44 2.00 2.51
1-1/2
BST-12 1.42
–
–
–
– 1 1/2-11 1/2 2.88 2.50 3.00
Contact division for BSPP port availability
*
Fluorocarbon Seals are standard with 316 Stainless Steel
Body
Part
Part No.
Part No.
Thread
Dimensions (in.)
Size
No.
Wt. (LB.) Type 303 Wt. (LB.) Type 316 Wt. (LB.)
Size Overall
Wrench Largest
(
in.)
Brass P/Piece Stainless P/Piece Stainless P/Piece NPTF Length Flats Diameter
A
B
C
1/8
BST-1M 0.05 SST-1M 0.05 SSST-1MY* 0.05 1/8-27 1.06 0.56 0.69
1/4
BST-2M 0.16 SST-2M 0.16 SSST-2MY* 0.16 1/4-18 1.69 0.81 0.81
3/8
BST-3M 0.25 SST-3M 0.21 SSST-3MY* 0.21 3/8-18 1.75 1.00 1.16
1/2
BST-4M 0.34 SST-4M 0.31
–
–
1/2-14 1.94 1.13 1.30
3/4
BST-6M – SST-6M 0.49
–
–
3/4-14 2.17 1.44 1.66
1
BST-8M 0.85 SST-8M 0.08
–
– 1-11 1/2 2.53 1.75 2.02
Contact division for BSPT port availability
*
Fluorocarbon Seals are standard with 316 Stainless Steel