Is the STECKO mining end for 2SN hose, automatic steel supplied with a pre-installed NBR O-ring and Teflon back-up ring?

Yes. The STECKO mining end for 2SN hose, automatic steel is supplied complete with a pre-installed NBR O-ring and a Teflon back-up ring. The fitting is designed for crimping in 2SN hydraulic hoses, comes with a crimping sleeve, and features automatic steel (galvanized) construction with NBR sealing and a Teflon back-up ring.

Does the STECKO mining end for 2SN hose, automatic steel require a specific crimping sleeve size or type?

The STECKO mining end for 2SN hose, automatic steel does require a specific crimping sleeve size/type: it is supplied complete with a crimping sleeve matched to the fitting and 2SN hose, so you should use that supplied sleeve or an identical spec sleeve recommended by the manufacturer. Using a different sleeve size or incompatible type can cause poor crimp quality, leaks or seal failure. Material is automatic steel, galvanized; sealing uses NBR (o-ring) and Teflon (back-up ring), so maintain correct sleeve dimensions and crimping parameters for these components.

Can STECKO mining end for 2SN hose, automatic steel be used with alternative seal materials instead of NBR and Teflon?

Yes. STECKO mining end for 2SN hose, automatic steel can use alternative seal materials instead of NBR and Teflon, but several technical considerations must be met. Which alternatives are realistic - Fluoroelastomers (FKM/Viton): good for high temperatures, oils and fuels; suitable when chemical and thermal resistance surpass NBR requirements. - Hydrogenated Nitrile (HNBR): improved heat and oil resistance versus standard NBR; good for dynamic sealing under higher temperatures and pressures. - EPDM: excellent for hot water/steam and some chemicals, but poor with petroleum oils. not suitable if hydraulic oil compatibility is required. - Polyurethane (PU): very wear-resistant for dynamic seals, but limited chemical/temperature range. - PTFE variants (filled PTFE, e.g., glass- or graphite-filled): retain Teflon benefits with improved extrusion resistance as back-up ring substitutes. Key constraints and steps before changing seals 1. Compatibility with hydraulic fluid: ensure the new elastomer is compatible with the specific hydraulic oil used. 2. Temperature and pressure range: verify materialâs operating temperature and pressure/extrusion resistance meet system conditions. 2SN hoses and crimped fittings can see high pressure spikes and elevated temperatures. 3. Hardness and design fit: O-ring cross-section, durometer and back-up ring dimensions must match to preserve sealing geometry and prevent extrusion or blowout. Some materials require different tolerances. 4. Chemical exposure and mining environment: consider abrasive dust, contaminants, and potential chemical cleaners used in maintenance. 5. Certification and safety: mining applications often require approved materials; validate against applicable standards and site safety requirements. 6. Galvanized automatic steel mating surfaces: ensure no galvanic or chemical interactions with chosen seal compound that could degrade either part. Recommendation Consult the hose and fitting manufacturer or a qualified hydraulic sealing supplier with full system data (fluid type, max/operating pressure, temperature ranges, cyclic conditions) to select and validate the alternative O-ring and back-up ring materials. Perform compatibility tests and, if possible, field trials before widespread implementation.

STECKO mining end for 2SN hose, automatic steel

All products, Fittings for high-pressure hoses/

Additional information

Material	CS – steel (cast iron)
Standard length [m]	10

STECKO mining end fitting designed for crimping in hydraulic hoses type 2SN, supplied complete with a crimping sleeve. Material: automatic steel, galvanized. Sealing: NBR (o-ring), Teflon (back-up ring).

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
TI-GST120-06-06-2SN	End. STECKO DN10 with sleeve for hose 2SN 3/8"	10	-	In stock	Enquiry
TI-GST120-08-08-2SN	End. STECKO DN13 with sleeve for hose 2SN 1/2"	12	-	In stock	Enquiry
TI-GST120-12-12-2SN	End. STECKO DN19 with sleeve for hose 2SN 3/4"	20	-	In stock	Enquiry

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STECKO mining end fitting designed for crimping in hydraulic hoses type 2SN, supplied complete with a crimping sleeve. Material: automatic steel, galvanized. Sealing: NBR (o-ring), Teflon (back-up ring).