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4320P — RING,WEARING

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

4320P: RING,WEARING.

The RING,WEARING is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 400, stem_actuating_end_type: THREADED EXTERNALLY, valve_size_for_which_designed: 1.250 INCHES IN, valve_type_for_which_designed: GATE, material_document_and_classification: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE, valve_model_number_for_which_designed: 1305. This part is cataloged in the U.S.

Government catalog under NSN 4320-00-218-3409, 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
4320P
NSN: 4320-00-218-3409
NIINs: 002183409, 012245487
FSC: 4320 — Power and Hand Pumps
CAGE: 0UBG9 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DIV EPD (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400
stem_actuating_end_typeTHREADED EXTERNALLY
valve_size_for_which_designed1.250 INCHES IN
valve_type_for_which_designedGATE
material_document_and_classificationQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE
valve_model_number_for_which_designed1305
NSN4320-00-218-3409
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,WEARING TITLE COMPONENT PN 4320P MFR RING,WEARING
KEY FEATURES
•
SURFACE FINISH: 125.0 MICROINCHES ALL SURFACES
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY STYLE: PLAIN
•
BODY OUTSIDE DIAMETER: 5.028 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-390,ALLOY D5 FED SPEC SINGLE MATERIAL RESPONSE
•
BODY INSIDE DIAMETER: 4.247 INCHES MINIMUM AND 4.248 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY
TECHNICAL CHARACTERISTICS
SURFACE FINISH125.0 MICROINCHES ALL SURFACES
CORNER SHAPESQUARE ALL CORNERS
BODY STYLEPLAIN
BODY OUTSIDE DIAMETER5.028 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390,ALLOY D5 FED SPEC SINGLE MATERIAL RESPONSE
OVERALL LENGTH1.125 INCHES NOMINAL IN
BODY INSIDE DIAMETER4.247 INCHES MINIMUM AND 4.248 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY
SUBSTITUTES & CROSS-REFERENCES 3
168565DDReference document
Same NSN cross-reference
Reference document — Secondary reference
SL4219PC71Reference document
Same NSN cross-reference
Reference document — Secondary reference
SL4221PC71Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 4320P?
4320P is a RING,WEARING.
What parts can replace 4320P?
There are 3 known substitutes for 4320P: 168565DD, SL4219PC71, SL4221PC71. Substitute compatibility should be verified for your specific system.
What is the NSN for 4320P?
4320P is cataloged in the U.S. Government catalog under NSN 4320-00-218-3409. 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.