Is the JIC straight reduction fitting with UNF GZ in carbon steel, type GR compatible with 37Â° cone sealing and standard UNF male threads on the mating component?

Yes. The JIC straight reduction fitting with UNF GZ in carbon steel, type GR is compatible with a mating component that uses a 37Â° cone for sealing and standard UNF male threads. The fittingâs sealing surface is the JIC 37Â° cone, so proper metal-to-metal contact at the cone is required for leak-tight performance; the external UNF thread (GZ) provides mechanical engagement with the male UNF thread but does not seal. Ensure the mating male part has the matching 37Â° cone angle and UNF thread size/series specified by the fitting. Also verify material and plating compatibility (carbon steel, galvanized) to avoid galvanic corrosion, and confirm torque and thread engagement per manufacturer recommendations to achieve proper cone compression and sealing.

Can JIC straight reduction fitting with UNF GZ in carbon steel, type GR be used with external UNF male threads and a 37Â° cone sealing surface?

Yes. A JIC straight reduction fitting with UNF GZ in carbon steel, type GR (straight reducing fitting JIC 37Â° with external UNF thread, seal on 37Â° cone, material: carbon steel, galvanized) is designed to seal on a 37Â° cone and mate with external UNF male threads. Therefore it can be used with external UNF male threads that have a 37Â° cone sealing surface, provided thread size and taper match and components are in good condition. Ensure correct torque, thread engagement, and compatibility of galvanizing and system media to avoid galvanic corrosion or plating damage.

Does JIC straight reduction fitting with UNF GZ in carbon steel, type GR require specific external UNF thread tolerances for 37Â° cone sealing?

No. The JIC straight reduction fitting with UNF GZ in carbon steel, type GR (seal on 37Â° cone) does not itself impose unique external UNF thread tolerances beyond standard UNF thread classes specified for JIC 37Â° cone fittings. For reliable 37Â° cone metal-to-metal sealing you must ensure: - Use standard UNF thread form and tolerance class compatible with JIC fittings (typically UNF per ASME/ANSI/B1.1 and common fit classes used in hydraulic fittings, e.g., Class 2A/2B or specified equivalent by the manufacturer). - Maintain accurate concentricity and runout between the external UNF thread and the 37Â° cone surface; machining tolerances that preserve cone geometry and thread-to-cone alignment are critical for sealing. - Surface finish and thread engagement must meet manufacturer recommendations to prevent galling (carbon steel, galvanized) and ensure proper torque and load distribution. - Follow relevant standards and supplier specifications for thread length, minor/major diameters and pitch to assure correct engagement with mating internal thread while allowing cone seats to contact properly. In practice, verify with the fitting manufacturer or applicable hydraulic/JIC standards for any recommended tolerance class or special requirements for carbon steel, galvanized JIC fittings.

JIC straight reduction fitting with UNF GZ in carbon steel, type GR

Additional information

Material	CS – steel (cast iron)

Straight reducing fitting JIC 37° with external UNF thread (seal on 37° cone). Material: carbon steel, galvanized.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HJ-GR-09-07	GZ JIC fitting 9/16"-18 / GZ 7/16"-20	-	350	In stock	Enquiry
HJ-GR-12-09	GZ JIC fitting 3/4"-16 / GZ 9/16"-18	-	350	In stock	Enquiry
HJ-GR-14-12	GZ JIC fitting 7/8"-14 / GZ 3/4"-16	-	350	In stock	Enquiry
HJ-GR-17-12	GZ JIC fitting 1.1/16"-12 / GZ 3/4"-16	-	350	In stock	Enquiry
HJ-GR-17-14	GZ JIC fitting 1.1/16"-12 / GZ 7/8"-14	-	350	In stock	Enquiry
HJ-GR-21-17	GZ JIC fitting 1.5/16"-12 / GZ 1.1/16"-12	-	290	In stock	Enquiry