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HHR555 — REDUCER,HOSE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

HHR555: REDUCER,HOSE.

The REDUCER,HOSE is a the manufacturer industrial component. Key specifications include material: RUBBER OVERALL, leg_length: 7.000 INCHES NOMINAL ALL ENDS IN, connection_type: GROOVED COUPLING ALL ENDS, connection_style: PLAIN (HOSE) ALL ENDS, special_features: 0.99 LBS LBS, style_designator: PLAIN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-587-7670, 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
HHR555
NSN: 4730-01-587-7670
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 00DW6 — GRIFFITH RUBBER MILLS INC DBA BAUMAN HARNISH RUBBER CO (USA)
SPECIFICATIONS
materialRUBBER OVERALL
leg_length7.000 INCHES NOMINAL ALL ENDS IN
connection_typeGROOVED COUPLING ALL ENDS
connection_stylePLAIN (HOSE) ALL ENDS
special_features0.99 LBS LBS
style_designatorPLAIN
mounting_end_typeFLAT
nominal_overall_length6.000 INCHES IN
end_item_identificationRG-33 MRAP
part_name_assigned_by_controlling_agencyREDUCING HUMP HOSE
NSN4730-01-587-7670
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: HHR555 · 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
KEY FEATURES
•
MOUNTING END TYPE: FLAT
•
CONNECTION STYLE: PLAIN (HOSE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 6.000 INCHES IN
•
CONNECTION TYPE: GROOVED COUPLING ALL ENDS
•
STYLE DESIGNATOR: PLAIN
•
LEG LENGTH: 7.000 INCHES NOMINAL ALL ENDS IN
TECHNICAL CHARACTERISTICS
MOUNTING END TYPEFLAT
CONNECTION STYLEPLAIN (HOSE) ALL ENDS
NOMINAL OVERALL LENGTH6.000 INCHES IN
CONNECTION TYPEGROOVED COUPLING ALL ENDS
STYLE DESIGNATORPLAIN
LEG LENGTH7.000 INCHES NOMINAL ALL ENDS IN
SPECIAL FEATURES0.99 LBS LBS
PART NAME ASSIGNED BY CONTROLLING AGENCYREDUCING HUMP HOSE
END ITEM IDENTIFICATIONRG-33 MRAP
MATERIALRUBBER OVERALL
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 3
55H5Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
12538754Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
55R50Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HHR555?
HHR555 is a REDUCER,HOSE.
What parts can replace HHR555?
There are 3 known substitutes for HHR555: 55H5, 12538754, 55R50. Substitute compatibility should be verified for your specific system.
What is the NSN for HHR555?
HHR555 is cataloged in the U.S. Government catalog under NSN 4730-01-587-7670. 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.