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Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
4300 Catalog
K4 BSP Adapters
Dimensions and pressures for reference only, subject to change.
Table J2 – Standard Material
Specifications for K4 Adapters
Introduction
Parker introduced K4 (BSP) adapters in the late 1990s to ad-
dress market requirements for OEM and replacement BSP
adapters. These fittings are typically used as hose adapters
on equipment designed and/or manufactured throughout
Europe, especially equipment with ties to the UK, Scandinavia,
the Netherlands, Spain and Italy. BSP cone adapters are similar
in function to NPSM (07 Adapters) but with BSPP threads.
The metal-to-metal sealing is achieved by a single line of
contact between the conical surface of the 60° cone seat and
the corresponding surface of the ballnose or cone swivel, as
shown in Fig. J1.
K4 adapters aremanufactured in accordancewithBS5200 stan-
dards.The60° internal seat isdesigned for sealingwithBSPhose
swivel connections offered bymanymanufacturers.K4 adapters
mate with Parker hose fitting series shown in Table J1.
Further enhancing the flexibility of the K4 adapter product line
is the ability for the male BSP cone end of the straight fittings
to also be used as a port adapter in ISO 1179-1 / DIN 3852
ports. This is accomplished with the addition of a bonded seal
(often referred to as a “Dowty
®
” seal). This product feature is
illustrated in Fig. J2.
It should be noted that Parker offers two very similar cone style
BSPP adapters — P4 and K4. Parker’s K4 (60° cone, BSPP)
fittings conform to BS5200, while P4 adapters conforms to JIS
B8363 specification.
K4 Adapters, while very similar to JIS
P4 cone style fittings, are not interchangeable.
See th
or more information regarding the interchangeability of
JIS and BS fittings.
Design and Construction
Construction:
Shaped K4 adapters are manufactured from a
hot forged construction. Straight adapters are manufactured
from cold drawn barstock.
Threads:
The standard K4 products are manufactured with the
thread forms listed below:
BSPP Threads: ISO 228-1 G
BSPT Threads: ISO 7/1, JIS B 0203
NPTF Threads: SAE J476, ANSI B1.20.3, FED-STD-H28/8
Assembly and Installation
Please refer t
r the assembly and installation in-
structions for K4 fittings.
Materials Specifications
K4 adapters are manufactured using state-of-the-art equipment
andmanufacturing technologies toassure construction integrity,
highest strength, long service life and the highest quality.These
materials are shown in Table J2.
Upon request, K4 fittings can be furnished in materials other
than Parker’s standard steel offering.
Fig. J1 – K4 Interface
Table J1 – Parker K4 Fittings Hose
Adaptability
Fig. J2 – K4 End Used as a BSPP Port Adapter (in ISO 1179/ DIN
3852, Part 2 Port)
Adapter
Connection End
Mating Parker Hose
Fitting Series
K4 / K46
D9/92, B1, B2, B4
K4 BSP
Adapters
Steel
ASTM Type
Forged Bodies A576 1214/1215
Bar Stock Bodies A108 12L14
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