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7HB789 — REDUCER,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

7HB789: REDUCER,TUBE.

The REDUCER,TUBE is a the manufacturer industrial component. Key specifications include special_features: MATERIAL: GREY RUBBER FITS: 3/8 INCH O.D. DRAIN TUBES IN, part_name_assigned_by_controlling_agency: ADAPTER,DRAIN,BARBED.

This part is cataloged in the U.S. Government catalog under NSN 4730-01-534-3080, indicating validated use in U.S. government and defense logistics supply chains.

Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
7HB789
NSN: 4730-01-534-3080
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
special_featuresMATERIAL: GREY RUBBER FITS: 3/8 INCH O.D. DRAIN TUBES IN
end_item_identification52320-01-465-2174 MK23, 2320-01-465-2176 MK25, 2320-01-465-2180 MK27, 2320-01-465-2182 MK28, 2320-01-465-2186 MK29, 2320-01-465-2189 MK30, 2320-01-465-2260 MK36, 2320-01-504-5218 MK37
part_name_assigned_by_controlling_agencyADAPTER,DRAIN,BARBED
NSN4730-01-534-3080
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 7HB789 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESMATERIAL: GREY RUBBER FITS: 3/8 INCH O.D. DRAIN TUBES IN
PART NAME ASSIGNED BY CONTROLLING AGENCYADAPTER,DRAIN,BARBED
END ITEM IDENTIFICATION52320-01-465-2174 MK23, 2320-01-465-2176 MK25, 2320-01-465-2180 MK27, 2320-01-465-2182 MK28, 2320-01-465-2186 MK29, 2320-01-465-2189 MK30, 2320-01-465-2260 MK36, 2320-01-504-5218 MK37
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
012890100Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7HB789?
7HB789 is a REDUCER,TUBE.
What parts can replace 7HB789?
There is 1 known substitute for 7HB789: 012890100. Substitute compatibility should be verified for your specific system.
What is the NSN for 7HB789?
7HB789 is cataloged in the U.S. Government catalog under NSN 4730-01-534-3080. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.