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Catalog OEM-1, Couplings / Page 25
Style A
5780 Series Coupling with Straight/Belled Copper Configuration
Parker’s FD57 series stub kit couplings
combine the 5700 series couplings with
unique copper connections. The addition-
al copper creates a drop-in replacement
and allows copper-to-copper brazing.
Application
 Factory precharged heat pump and split-
type air conditioning systems.
Base Product Part
Number
 FD57 - XXXX - Copper size - coupling size
Features and Benefits
 Easy installation of replacement units.
 Direct copper braze capability.
Agency Approvals
UL Recognized;
File No. SA7511
Style A Style C
Style E
Style G
Style D
Part Number
Dimensions – Inches
Thread
T
A
Ref.
B
Ref.
C
Ref.
D
Ref.
E
Ref.
FD57-1127-04-06 5/8”-18 4.09 0.81 0.31 0.25 0.62
FD57-1127-06-06 5/8”-18 4.09 0.81 0.31 0.38 0.62
FD57-1127-08-10 1-1/16”-12 5.28 1.31 0.38 0.50 1.00
FD57-1127-08-11 1-1/8”-12 5.32 1.31 0.38 0.50 1.00
FD57 Series Stub Kit Couplings