Parker Hydraulic Union Straight Threaded Adaptor G 1/2 to G 3/4 Male, 12-8HMK4S

View all Hydraulic Fittings

Subtotal (1 pack of 2 units)*

£13.11

(exc. VAT)

£15.73

(inc. VAT)

Add to Basket
Select or type quantity
In Stock
  • Plus 60 unit(s) shipping from 27 October 2025
  • Plus 29 unit(s) shipping from 27 October 2025
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Pack(s)
Per Pack
Per unit*
1 +£13.11£6.555

*price indicative

RS Stock No.:
807-621
Mfr. Part No.:
12-8HMK4S
Brand:
Parker
Find similar products by selecting one or more attributes.
Select all

Brand

Parker

Connector A

G 1/2

Connector A - Thread Size

1/2in

Hydraulic Fitting Type

Hydraulic Union Straight Threaded Adaptor

Connector B

G 3/4 Male

Connector B - Thread Size

3/4in

Material

Steel

Finish

Zinc Plated

Connector A - Thread Standard

G

Connector A - Gender

Male

Connector B - Gender

Male

Connector B - Thread Standard

G

Maximum Operating Pressure

200bar

Maximum Operating Temperature

+120°C

Minimum Operating Temperature

-40°C

RoHS Status: Exempt

Union


A range of equal and unequal male BSP parallel thread adaptors.
Parkers K series adapters are manufactured to meet BS5200 standards and designed to seal with BSP
Hose swivel connectors. Parkers K4 adapter series can be used with Parker D9/92, B1, B2 and B4 adapters. Straight fittings can also be used an adaptor with ISO 1179-1 / DIN 3852 ports by using a bonded seal.

Features and Benefits


Visible bite of progressive ring helps prevent blow-off
Excellent sealing capacity when used in various applications including vacuum and hydraulic systems
Stress evenly distributed throughout out minimising concentration at the bite point
Compact overall dimensions make EO fittings ideal or confined spaces

Note

For adaptors of unequal sizes then the lower pressure rating is applicable.

Warning

Hydraulic systems can work at high pressures, and fittings and adaptors can be subjected to extreme loadings such as vibration and uncontrolled pressure peaks. When choosing fittings or adaptors careful attention should be given to the technical specifications.

Standards

BS5200

Related links