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D4000FF ITEM 20 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

D4000FF ITEM 20: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: COPPER ALLOY, special_features: UNIT OF ISSUE SET CONSISTS OF 2 SPRING WASHERS., end_item_identification: USED ON ANGLE RELIEF VALVE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-476-8670, 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
D4000FF ITEM 20
NSN: 5340-01-476-8670
FSC: 5340 — Hardware, Commercial
CAGE: 65079 — DANCO VALVE COMPANY (USA)
SPECIFICATIONS
materialCOPPER ALLOY
special_featuresUNIT OF ISSUE SET CONSISTS OF 2 SPRING WASHERS.
end_item_identificationUSED ON ANGLE RELIEF VALVE
NSN5340-01-476-8670
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: D4000FF ITEM 20 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: COPPER ALLOY
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESUNIT OF ISSUE SET CONSISTS OF 2 SPRING WASHERS.
END ITEM IDENTIFICATIONUSED ON ANGLE RELIEF VALVE
MATERIALCOPPER ALLOY
SUBSTITUTES & CROSS-REFERENCES 2
D4023Reference document
Same NSN cross-reference
Reference document — Secondary reference
B4023Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 D4000FF ITEM 20?
D4000FF ITEM 20 is a SEAT,HELICAL COMPRESSION SPRING.
What parts can replace D4000FF ITEM 20?
There are 2 known substitutes for D4000FF ITEM 20: D4023, B4023. Substitute compatibility should be verified for your specific system.
What is the NSN for D4000FF ITEM 20?
D4000FF ITEM 20 is cataloged in the U.S. Government catalog under NSN 5340-01-476-8670. This indicates validated use in U.S. government and defense supply chains.
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