Female-thread coupling with holes and NBR rubber seal, malleable cast iron, galvanized, max. PN 10, sizes R 3/8" – G 1"
Female-thread coupling from Krause K+K with holes for safety clips. 42 mm claw spacing, zinc-plated malleable cast iron, NBR seal, and max. PN 10 for compressed-air connections that can be further secured.
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| Item No.
003-05-SB
Female-thread coupling with holes and NBR rubber seal, malleable cast iron, galvanized, max. PN 10, sizes R 3/8" – G 1" - R 3/8" is in stock and will be shipped as soon as it is available again
Questions & Help
Questions & Help
Do you have questions about one of our products, or would you like expert advice on selecting the right solution for your application?
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Leasing & Rent-to-Own
Leasing & Rent-to-Own
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
Hire purchase is economically equivalent to installment purchase. The product is capitalized on the hire purchaser’s balance sheet and depreciated in accordance with the official depreciation tables. Upon payment of the final hire purchase installment, ownership of the item is transferred to the hire purchaser. Value-added tax must be paid in full with the first hire purchase installment (transitory item).
Shipping & Delivery
Shipping & Delivery
Depending on the size, weight, and nature of our goods, they are shipped either via parcel service or freight carrier. We select the shipping method at our reasonable discretion.
The delivery times listed in the online store are non-binding estimates, unless a binding delivery date has been expressly confirmed in writing. They are based on the information available from our manufacturers, suppliers, and logistics partners at the time the order is placed.
Most of the products offered are shipped directly from the manufacturer or from external central warehouses (direct shipping). As a result, delivery times may differ from the estimated times provided. Delivery delays may occur, particularly in the event of material shortages, production delays, supply bottlenecks, force majeure, or other circumstances beyond our control.
Disclaimer:
We assume no liability for delivery delays resulting from circumstances beyond our control. This applies in particular to delays caused by manufacturers, suppliers, shipping companies, or other third parties. Liability for any resulting damages—in particular for indirect damages, consequential damages, or lost profits—is excluded to the extent permitted by law.
Partial deliveries are permitted, provided they are reasonable for the customer. This does not result in additional shipping costs, unless otherwise agreed.
The exact delivery time for an item can be provided on an individual basis upon request, either before or after the order is placed.
Please contact us by phone at +49 (0)2551 5030 or by email at shipping@strahltechnik-express.de.
In the event of significant delivery delays, we will inform the customer immediately. The customer’s mandatory statutory rights remain unaffected by this.
| Item No.
003-05-SB
Female-thread coupling with holes and NBR rubber seal, malleable cast iron, galvanized, max. PN 10, sizes R 3/8" – G 1" - R 3/8" is in stock and will be shipped as soon as it is available again
Krause K+K female-thread coupling with bores – additional lockable claw coupling for compressed air
The female-thread coupling with holes from Krause K+K features additional safety holes for clips. Once coupled, the connection can thus be mechanically secured against accidental opening. This makes this design particularly suitable for demanding compressed air applications with heightened safety requirements.
The coupling has a 42 mm claw spacing, is made of galvanized malleable cast iron, and uses an NBR rubber seal. The temperature range is −40 °C to +100 °C, and the maximum operating pressure is PN 10. The female thread allows for direct mounting on pipes, fittings, and system components.
Benefits
✅ Holes for additional safety clips
✅ Mechanical lock to prevent accidental opening is available
✅ 42 mm claw spacing
✅ Malleable cast iron, galvanized
✅ NBR rubber seal
✅ −40 °C to +100 °C
✅ Various female thread sizes
✅ Maximum PN 10
Technical Specifications
| Feature | Value |
|---|---|
| Translation | Female-thread coupling with safety holes |
| claw spacing | 42 mm |
| Material | Malleable cast iron, galvanized |
| Gasket | NBR |
| Temperature range | −40 °C to +100 °C |
| Additional Safeguard | Holes for safety clips |
| operating pressure | max. PN 10 |
Variants
| female thread | Item No. / SKU |
|---|---|
| R 3/8" | 003-05-SB |
| G 1/2" | 003-07-SB |
| G 3/4" | 003-09-SB |
| G 1" | 003-11-SB |
How It Works and Compatibility
✔ After coupling, suitable safety clips can be inserted through the designated holes
✔ The clips add an additional mechanical lock to the claw connection
✔ 42-mm coupling head for the corresponding safety coupling series
✔ Female threads for direct mounting on fittings and compressed-air lines
✔ Designed for applications where an additional safety feature is required or desired
Applications
✔ Mining and Tunnel Construction
✔ Industry and Construction Sites
✔ Compressed-air lines with female threaded connections
✔ Mechanical and Plant Engineering
✔ Applications with increased safety requirements
FAQ
What are the holes used for?
For installing suitable safety clips that further prevent the coupled connection from opening unintentionally.
What is the claw spacing of the coupling?
42 mm.
Which seal is installed?
NBR.
What is the maximum operating pressure?
PN 10.
What female threads are available?
R 3/8", G 1/2", G 3/4", and G 1".
Conclusion
The Krause K+K female-thread coupling with safety holes is a robust solution for compressed air systems where, in addition to the quick-connect claw coupling, an additional mechanical locking mechanism is desired. Made of zinc-plated malleable cast iron with an NBR seal and available in several female thread sizes, it can be flexibly integrated into professional systems.
Payment & Security
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