Hose coupling with locking nut and NBR rubber seal, DIN 3238, with or without safety collar, galvanized steel/cast iron, max. PN 16, hose nominal bore 10–25 mm
Krause K+K blast hose coupling according to DIN 3238 with brass locking nut, 42 mm claw spacing, and oil-resistant NBR seal. Available with or without a safety collar, as well as with a crimp ferrule collar; max. PN 16.
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| Item No.
013-10
Hose coupling with locking nut and NBR rubber seal, DIN 3238, with or without safety collar, galvanized steel/cast iron, max. PN 16, hose nominal bore 10–25 mm - without a safety collar / 10 is in stock and will be shipped as soon as it is available again
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We offer leasing and rent-to-own financing options exclusively to business owners, tradespeople, and the self-employed for selected products with a net merchandise value of €1,000 or more. Below you will find the key differences between these two financing options.
Leasing
In a lease, the product is made available to the lessee for use in exchange for regular lease payments. The lessor is responsible for accounting for the lease. The lease payments can generally be claimed as business expenses for tax purposes. These are gross payments, and value-added tax is charged throughout the entire term. At the end of the agreed-upon basic lease term, it is generally possible to purchase the product.
Hire Purchase
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| Item No.
013-10
Hose coupling with locking nut and NBR rubber seal, DIN 3238, with or without safety collar, galvanized steel/cast iron, max. PN 16, hose nominal bore 10–25 mm - without a safety collar / 10 is in stock and will be shipped as soon as it is available again
Krause K+K hose coupling with locking nut DIN 3238 – lockable safety coupling for compressed-air hoses
The Krause K+K DIN 3238 hose coupling combines direct hose connection with a manually lockable claw screw coupling. After coupling, the locking nut is tightened to prevent the claw connection from loosening on its own. This makes the coupling particularly suitable for professional compressed-air systems with increased connection-safety requirements.
The coupling has a 42 mm claw spacing with double safety cams. The coupling body is made of galvanized steel/cast iron and the locking nut is made of brass. An oil-resistant NBR seal is used. The temperature range is −40 °C to +100 °C and the maximum operating pressure is PN 16. Depending on the version, the coupling is available without a safety collar, with a safety collar, or with a crimp-ferrule collar. According to Krause K+K, the series is compatible with all MODY safety screw couplings.
Benefits
✅ Safety hose coupling according to DIN 3238
✅ Locking nut prevents accidental loosening
✅ 42 mm claw spacing with double safety cams
✅ Galvanized steel/cast-iron coupling body
✅ Brass locking nut
✅ Oil-resistant NBR seal
✅ Available without safety collar, with safety collar, or with crimp-ferrule collar
✅ Temperature range −40 °C to +100 °C
✅ Compatible with MODY safety screw couplings
✅ Maximum operating pressure PN 16
Technical Specifications
| Feature | Value |
|---|---|
| Design | Hose coupling with locking nut |
| Standard | DIN 3238 |
| Claw spacing | 42 mm |
| Claw design | Double safety cams |
| Coupling body | Steel/cast iron, galvanized |
| Locking nut | Brass |
| Seal | NBR, oil-resistant |
| Temperature range | −40 °C to +100 °C |
| Hose connection | without safety collar / with safety collar / with crimp-ferrule collar |
| Operating pressure | max. PN 16 |
| Compatibility | Compatible with MODY safety screw couplings |
Variants
| Version | Hose nominal bore (mm) | Item No. / SKU |
|---|---|---|
| without safety collar | 10 | 013-10 |
| without safety collar | 13 | 013-13 |
| without safety collar | 15 | 013-15 |
| without safety collar | 19 | 013-19 |
| without safety collar | 25 | 013-25 |
| with safety collar | 13 | 013-13S |
| with safety collar | 19 | 013-19S |
| with safety collar | 25 | 013-25S |
| with crimp-ferrule collar | 19 | 013-19PB |
How It Works and Compatibility
✔ The claws are first connected like a conventional claw coupling
✔ The locking nut is then tightened manually
✔ The tightened locking nut prevents the connection from loosening on its own
✔ Krause K+K recommends combining a conventional claw coupling with a claw screw coupling
✔ According to the manufacturer, the DIN 3238 series is compatible with all MODY safety screw couplings
✔ The hose tail connects directly to the compressed-air hose
Selecting the Hose Connection
Without safety collar: conventional hose-tail design for proper hose fastening with a suitable clamp.
With safety collar: when combined with a suitable Type B clamp, allows additional positive locking of the hose assembly.
With crimp-ferrule collar: designed for hose connections using a corresponding crimp ferrule.
Installation and Safety
Hose nominal bore, actual hose outer diameter, hose-tail size, and fastening method must match. On versions with a safety collar, the safety claws of a suitable Type B clamp must be positioned correctly behind the collar. Before disconnecting the coupling, depressurize the compressed-air line. Inspect the seal, hose, clamp, and coupling regularly for wear and damage.
Applications
✔ General compressed-air systems
✔ Compressors and compressed-air hoses
✔ Construction sites and industry
✔ Mechanical and plant engineering
✔ Applications with increased safety requirements
✔ Professional compressed-air and blasting technology within the permissible operating data
FAQ
What does the locking nut do?
It locks the coupled connection and prevents it from loosening on its own.
Which hose-connection versions are available?
Without safety collar, with safety collar, and one version with a crimp-ferrule collar.
What is the advantage of the safety collar?
Combined with a matching Type B clamp, it allows additional positive locking of the hose connection.
What is the claw spacing?
42 mm.
Which seal is installed?
An oil-resistant NBR seal.
What is the maximum operating pressure?
PN 16.
Conclusion
The Krause K+K DIN 3238 hose coupling combines direct hose connection with the additional security of a manually lockable claw screw coupling. Multiple hose sizes and three different hose-connection versions allow precise adaptation to the application, while 42 mm claw spacing, NBR sealing, and PN 16 define the key technical data of the safety-coupling series.
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