Wing Nut Hydraulic Quick Coupling
Screw-together hydraulic quick coupling tightened by hand with a wing nut — vibration-resistant, non-valved, for agricultural and general implement lines. 1/4", 3/8", 1/2", 3/4", BSP female, BSP male, NPT female.
Key features
- Series: Wing Nut (screw-together)
- Interchange Standard: Wing nut screw-together — agricultural / trailer interchange
- Application Class: Farm Hydraulic
- Valving: Non-Valved
- Connection Method: Thread-to-Connect
- Maximum Operating Pressure: 250 bar
- Series
- Wing Nut (screw-together)
- Interchange Standard
- Wing nut screw-together — agricultural / trailer interchange
- Application Class
- Farm Hydraulic
- Valving
- Non-Valved
- Available Body Sizes
- 1/4", 3/8", 1/2", 3/4"
- Connection Method
- Thread-to-Connect
Product description
The Wing Nut Hydraulic Quick Coupling is a screw-together (wing nut) hydraulic quick coupling for agricultural and trailer service. Used where a push-to-connect latch works loose under vibration — implement lines, static machine connections and low-cycle service points.
Construction
- Series: Wing Nut (screw-together)
- Connection method: thread-to-connect, hand-tightened by the wing nut — no tools required
- Valving: non-valved (free flow when coupled; the line must be depressurised before disconnecting)
- Body material: carbon steel, zinc-plated
- Seals: NBR standard; Viton on request for high-temperature or aggressive fluids
- Available sizes: 1/4", 3/8", 1/2", 3/4"
- Port threads: BSP female, BSP male, NPT female
Performance
Rated to 250 bar working pressure with a 4:1 burst safety factor. Operating temperature -25°C to +100°C on NBR seals. The wing nut resists vibration loosening better than a push-to-connect ball latch, which is why it persists on trailer and implement lines.
How to order
Specify (a) the body size, (b) the port thread you need, (c) male half, female half, or matched pair, and (d) seal compound. Tell us the implement or trailer make on the RFQ if you are matching an existing coupling.
Companion products
For push-to-connect service see the Indus QC-7241A (ISO 7241 Series A), QC-7241B (Series B) and QC-16028 flush-face ranges in the same category. For farm tractor tips see the Indus QC-5675 range (ISO 5675).
Identification
| Parameter | Value |
|---|---|
| Series | Wing Nut (screw-together) |
| Interchange Standard | Wing nut screw-together — agricultural / trailer interchange |
| Application Class | Farm Hydraulic |
| Valving | Non-Valved |
Variants
| Parameter | Value |
|---|---|
| Available Body Sizes | 1/4", 3/8", 1/2", 3/4" |
| Available Body Materials | Carbon steel, zinc-plated |
| Available Seal Materials | NBR (standard), Viton (on request) |
| Available Port Thread Types | BSP female, BSP male, NPT female |
| Available Coupling Halves | Male half, female half, or matched pair |
Construction
| Parameter | Value |
|---|---|
| Connection Method | Thread-to-Connect |
| Flush Face / No-Spill | no |
| Connect Under Pressure | no |
Performance
| Parameter | Value |
|---|---|
| Maximum Operating Pressure | 250 bar |
| Minimum Burst Pressure | 1000 bar |
| Operating Temperature Min | -25 °C |
| Operating Temperature Max | 100 °C |
Shipping & lead time
What is a wing nut coupling?▾
Can it be connected under pressure?▾
Is it valved?▾
What pressure is it rated to?▾
Which port threads are available?▾
Are male and female halves sold separately?▾
Lead time?▾
Shipped worldwide from our Dubai warehouse. Transit, routes and documentation for 126 destinations
The same part, in the designations used across European and Gulf trade catalogues.
- de
- Schnellkupplung Flügelmutter
- fr
- raccord rapide écrou à oreilles
- es
- acoplamiento rápido tuerca de mariposa
- it
- innesto rapido dado ad alette
From the blog
Written about this range
Safety & HSE
Trapped pressure: why the coupler will not connect, and how to release it safely
An attachment left in the sun all morning can build enough pressure in a disconnected line to make a coupler impossible to push home. Forcing it is the part that hurts people.
5 min read
Failure analysis
What splits a female coupler half
A cracked female coupler body is not a manufacturing defect and it is not bad luck. It is almost always one of three things, and two of them are avoidable for nothing.
4 min read
Machine down
Tractors and implements: the couplers are older than the machine
Agricultural hydraulics run on a coupler standard that has barely changed in decades, which is why a 1990s implement still connects to a new tractor — and why grit gets into everything.
3 min read
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Brass ISO 7241-B Male Quick Coupler × NPTF Female
