Is the BEL 45° Twisted Tubular Hydraulic Fitting SMR311, Light Series Carbon Steel compatible with both rubber and thermoplastic hoses when used with a screwed sleeve?

Yes. The BEL 45° Twisted Tubular Hydraulic Fitting SMR311, Light Series Carbon Steel is specifically engineered for use with both rubber and thermoplastic hoses when assembled with a screwed sleeve. Its BEL cutting ring sealing system provides precise, leak-free connections, and the carbon steel construction with a galvanized finish ensures durability and corrosion resistance, making it compatible and reliable for a wide range of applications.

Can the BEL 45° Twisted Tubular Hydraulic Fitting SMR311, Light Series Carbon Steel be used in high-pressure hydraulic systems without additional reinforcement for rubber or thermoplastic hoses?

No — the BEL 45° Twisted Tubular Hydraulic Fitting SMR311, Light Series Carbon Steel is designed to provide a secure, leak-free connection with rubber and thermoplastic hoses when used in combination with the appropriate screwed sleeve and its cutting ring (BEL) sealing system, but it is intended for light-series applications. The description emphasizes reliable sealing, corrosion resistance and durability, yet does not specify ratings for high-pressure hydraulic service or state that additional reinforcement of rubber or thermoplastic hoses is unnecessary under high pressures. For high-pressure systems, hoses typically require reinforcement (braiding or steel wire) and components must be rated for the system’s maximum working pressure and safety margin. Before using SMR311 without extra hose reinforcement, verify the fitting’s and hose’s published maximum working pressure, compatibility with your hose assembly (including sleeve and cutting ring), and applicable standards; if ratings are not adequate, use reinforced hoses or a fitting explicitly rated for high-pressure service.

A fitting hydraulic screw tubular BEL 45°, type SMR311, series light, steel carbon

All products, Fittings for high-pressure hoses/

Additional information

Material	CS – steel (cast iron)

A fitting hydraulic screw, type S, with tube metric, sealing a ring cutting (BEL), angled 45° series light. Intended for screwing in hoses rubber and thermoplastic using ferrule screw-together. Material: steel carbon, galvanized.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
TI-SMR311-04-03	Fitting screw-together 45° tube 4 mm, hose 3/16", light	5	-	In stock	Enquiry
TI-SMR311-06-04	Fitting screw-together 45° tube 6 mm, hose 1/4", light	6	-	In stock	Enquiry
TI-SMR311-08-04	Fitting screw-together 45° tube 8 mm, hose 1/4", light	6	-	In stock	Enquiry
TI-SMR311-10-05	Fitting screw-together 45° tube 10 mm, hose 5/16", light	8	-	In stock	Enquiry
TI-SMR311-12-06	Fitting screw-together 45° tube 12 mm, hose 3/8", light	10	-	In stock	Enquiry
TI-SMR311-15-08	Fitting screw-together 45° tube 15 mm, hose 1/2", light	12	-	In stock	Enquiry
TI-SMR311-18-10	Fitting screw-together 45° tube 18 mm, hose 5/8", light	16	-	In stock	Enquiry
TI-SMR311-22-12	Fitting screw-together 45° tube 22 mm, hose 3/4", light	20	-	In stock	Enquiry

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A fitting hydraulic screw, type S, with tube metric, sealing a ring cutting (BEL), angled 45° series light. Intended for screwing in hoses rubber and thermoplastic using ferrule screw-together. Material: steel carbon, galvanized.