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PartsTable / COMPONENT / H684-1505-31
H684-1505-31 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The PACKING NUT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, special_features: ADJUSTS CONNECTING TUBE TO VALVE; COPPER ALLOY 623, end_item_identification: SHIP, part_name_assigned_by_controlling_agency: SEAL ADJUSTING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-504-5320, 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
H684-1505-31
NSN: 4730-01-504-5320
FSC: 4730
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialCOPPER ALLOY
special_featuresADJUSTS CONNECTING TUBE TO VALVE; COPPER ALLOY 623
end_item_identificationSHIP
part_name_assigned_by_controlling_agencySEAL ADJUSTING
NSN4730-01-504-5320
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: H684-1505-31 · 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
•
MATERIAL: COPPER ALLOY
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESADJUSTS CONNECTING TUBE TO VALVE; COPPER ALLOY 623
PART NAME ASSIGNED BY CONTROLLING AGENCYSEAL ADJUSTING
MATERIALCOPPER ALLOY
END ITEM IDENTIFICATIONSHIP
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
563-7286781-10Interchangeable
interchangeable cross-reference
interchangeable
H684-1505-10Interchangeable
interchangeable cross-reference
interchangeable
563-7286781Interchangeable
interchangeable cross-reference
interchangeable
H684-1505-35Interchangeable
interchangeable cross-reference
interchangeable
563-7286781-35Interchangeable
interchangeable cross-reference
interchangeable
2640-801X01 ITEM 16Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H684-1505-31?
H684-1505-31 is a PACKING NUT.
What parts can replace H684-1505-31?
There are 14 known substitutes for H684-1505-31: 563-7286781-10, H684-1505-10, 563-7286781 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H684-1505-31?
H684-1505-31 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-504-5320. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026