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F977439 — PLATE,SPECTACLE,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

F977439: PLATE,SPECTACLE,VALVE.

The PLATE,SPECTACLE,VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY AND COPPER ALLOY, pressure_rating: 00.0 LOW VOLATILE ORGANIC COMPOUND - COATINGS - PAPER, FABRIC AND FILM COATINGS, end_item_identification: V 81FS-END-NB, part_name_assigned_by_controlling_agency: SPECTACLE PLATE ASSEMBLY. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-631-1697, 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
F977439
NSN: 4820-01-631-1697
FSC: 4820 — Valves, Nonpowered
CAGE: 53631 — FETTEROLF CORPORATION (USA)
SPECIFICATIONS
materialNICKEL ALLOY AND COPPER ALLOY
pressure_rating00.0 LOW VOLATILE ORGANIC COMPOUND - COATINGS - PAPER, FABRIC AND FILM COATINGS
end_item_identificationV 81FS-END-NB
part_name_assigned_by_controlling_agencySPECTACLE PLATE ASSEMBLY
NSN4820-01-631-1697
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: F977439 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
PRESSURE RATING: 00.0 LOW VOLATILE ORGANIC COMPOUND - COATINGS - PAPER, FABRIC AND FILM COATINGS
•
MATERIAL: NICKEL ALLOY AND COPPER ALLOY
TECHNICAL CHARACTERISTICS
PRESSURE RATING00.0 LOW VOLATILE ORGANIC COMPOUND - COATINGS - PAPER, FABRIC AND FILM COATINGS
PART NAME ASSIGNED BY CONTROLLING AGENCYSPECTACLE PLATE ASSEMBLY
END ITEM IDENTIFICATIONV 81FS-END-NB
MATERIALNICKEL ALLOY AND COPPER ALLOY
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 1
73320 REV D ITEM 20Same 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 F977439?
F977439 is a PLATE,SPECTACLE,VALVE.
What parts can replace F977439?
There is 1 known substitute for F977439: 73320 REV D ITEM 20. Substitute compatibility should be verified for your specific system.
What is the NSN for F977439?
F977439 is cataloged in the U.S. Government catalog under NSN 4820-01-631-1697. 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.