Does the Walterscheidâ¢ GAI-M nut fitting, carbon steel, with Guardian Sealâ¢ coating require specific torque values for L (light) and S (heavy) series during installation?

Yes. The Walterscheidâ¢ GAI-M nut fitting, carbon steel with Guardian Sealâ¢ coating requires different installation torques for the L (light) and S (heavy) series. Because the two series have different thread engagement lengths and mechanical properties, Eaton/DIN 2353 specifies distinct tightening torques for correct sealing and to avoid thread damage. Always follow the manufacturerâs published torque table for GAI-M fittings (by series, nominal thread size and wrench size) and use a calibrated torque wrench. If Eatonâs torque values are not at hand, contact Eaton/Walterscheid technical support or consult the official DIN 2353/Eaton installation documentation before assembly.

Can the Walterscheidâ¢ GAI-M nut fitting, carbon steel, with Guardian Sealâ¢ coating be used interchangeably between L (light) and S (heavy) series assemblies?

No - Walterscheidâ¢ GAI-M nut fitting, carbon steel, with Guardian Sealâ¢ coating cannot be used interchangeably between L (light) and S (heavy) series assemblies. Although the GAI-M design follows 24Â° DIN 2353 dimensions, L and S series differ in thread sizes and body dimensions to suit light versus heavy-duty applications. Mixing series risks improper fit, leaks, and compromised mechanical strength. Always match the nut fitting series (L or S) to the corresponding assembly specification.

Are there specific lubricant requirements for installing Walterscheidâ¢ GAI-M nut fitting, carbon steel?

Yes. For installing Walterscheidâ¢ GAI-M nut fitting, carbon steel, use a compatible assembly lubricant to ensure proper sealing, torque accuracy, and to prevent galling of the carbon steel and stripped coatings. Recommended practice: - Use a general-purpose anti-seize or assembly paste compatible with steel and zinc/Guardian Sealâ¢ galvanic coatings (e.g., copper-free, non-silicone, petroleum-based anti-seize or MoS2-containing assembly pastes formulated for steel hydraulic fittings). - Apply sparingly to the external thread and the cone seating surface where assembly friction control is required; avoid contaminating the sealing surfaces with excessive lubricant that could affect hydraulic fluid compatibility. - Do not use aggressive chlorinated solvents or incompatible greases that can attack the galvanic coating or cause corrosion. - Ensure lubricant is compatible with the system hydraulic fluid (mineral oil, synthetic, or water-glycol) to avoid degradation. - Clean parts of dirt, rust, or old sealant before application. Torque values should be achieved using the manufacturerâs specified tightening torques for GAI-M fittings; lubricant will reduce friction so verify torques accordingly. If in doubt, follow Eaton/Walterscheid installation instructions or contact Eaton technical support for lubricant recommendations matched to your hydraulic fluid and operating conditions.

Walterscheid™ GAI-M nut fitting, carbon steel

Additional information

Material	CS – steel (cast iron)

DIN 2353 Eaton Walterscheid™ screw connection, type GAI-M: 24° DIN 2353 socket with external metric thread and internal metric thread. Available as: L (light series), S (heavy series). Material: carbon steel, with Guardian Seal™ galvanic coating.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HD-GAI-06L-M-10-W	Walterscheid fitting DIN 2353 GAI 6L M10x1	-	250	In stock	Enquiry
HD-GAI-06S-M-12-W	Walterscheid fitting DIN 2353 GAI 6S M12x1.5	-	630	In stock	Enquiry
HD-GAI-08L-M-12-W	Walterscheid fitting DIN 2353 GAI 8L M12x1.5	-	250	In stock	Enquiry
HD-GAI-08S-M-14-W	Walterscheid fitting DIN 2353 GAI 8S M14x1.5	-	630	In stock	Enquiry
HD-GAI-10L-M-14-W	Walterscheid fitting DIN 2353 GAI 10L M14x1.5	-	250	In stock	Enquiry
HD-GAI-10S-M-16-W	Walterscheid fitting DIN 2353 GAI 10S M16x1.5	-	630	In stock	Enquiry
HD-GAI-12L-M-16-W	Walterscheid fitting DIN 2353 GAI 12L M16x1.5	-	250	In stock	Enquiry
HD-GAI-12S-M-18-W	Walterscheid fitting DIN 2353 GAI 12S M18x1.5	-	630	In stock	Enquiry
HD-GAI-15L-M-18-W	Walterscheid fitting DIN 2353 GAI 15L M18x1.5	-	250	In stock	Enquiry
HD-GAI-16S-M-22-W	Walterscheid fitting DIN 2353 GAI 16S M22x1.5	-	400	In stock	Enquiry
HD-GAI-18L-M-22-W	Walterscheid fitting DIN 2353 GAI 18L M22x1.5	-	160	In stock	Enquiry
HD-GAI-20S-M-27-W	Walterscheid fitting DIN 2353 GAI 20S M27x2	-	400	In stock	Enquiry
HD-GAI-22L-M-26-W	Walterscheid fitting DIN 2353 GAI 22L M26x1.5	-	160	In stock	Enquiry

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DIN 2353 Eaton Walterscheid™ screw connection, type GAI-M: 24° DIN 2353 socket with external metric thread and internal metric thread. Available as: L (light series), S (heavy series). Material: carbon steel, with Guardian Seal™ galvanic coating.