PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

309PRing,wearing

Curtiss-Wright Electro-Mechanical Corporation Div Epd · NSN 4320-00-218-3386 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-218-3386 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-218-3386. Primary manufacturer part number: 309P.
Features
  • Ring,wearing — FSC 4320
  • Corner Shape: SQUARE INSIDE LEFT CORNER
  • Body Inside Diameter: 8.875 INCHES MINIMUM AND 8.876 INCHES MAXIMUM IN
  • Chamfer Angle: 45.0 DEGREES NOMINAL INSIDE RIGHT CORNER
  • Body Outside Diameter: 9.512 INCHES NOMINAL IN
  • Material: COPPER ALLOY
  • Corner Shape: CHAMFERED INSIDE RIGHT CORNER
  • Corner Shape: SQUARE OUTSIDE LEFT CORNER
Applications
  • Applications requiring Copper Alloy construction
General Description

The Ring,wearing, cataloged under National Stock Number 4320-00-218-3386, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-218-3386
Primary Part Number309P
Item NameRing,wearing
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerCurtiss-Wright Electro-Mechanical Corporation Div Epd
StatusACTIVE
Corner ShapeSQUARE INSIDE LEFT CORNER
Body Inside Diameter8.875 INCHES MINIMUM AND 8.876 INCHES MAXIMUM IN
Chamfer Angle45.0 DEGREES NOMINAL INSIDE RIGHT CORNER
Body Outside Diameter9.512 INCHES NOMINAL IN
MaterialCOPPER ALLOY
Corner ShapeCHAMFERED INSIDE RIGHT CORNER
Corner ShapeSQUARE OUTSIDE LEFT CORNER
Material Document and ClassificationQQ-C-390,ALLOY 903 FED SPEC SINGLE MATERIAL RESPONSE
Chamfer Length0.094 INCHES NOMINAL INSIDE RIGHT CORNER IN
Surface Finish125.0 MICROINCHES ALL SURFACES
Corner ShapeSQUARE OUTSIDE RIGHT CORNER
Body StylePLAIN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4320-00-218-3387310P INTERCHANGEABLE
Ring,wearing
Curtiss-Wright Electro-Mechanical Corporation Div Epd
Cross-Reference Index
Part NumberManufacturer
SL5560PC71 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
309P Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
SL6127PC71 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
SL5077PC71 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
SK-132995 Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA)
SL6780PC71 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
SL6782PC71 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
SL5562PC71 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
255079-11 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
309P PRIMARY Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA)
CS-255079-11 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
SL5079PC72 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
SL7988PC3-2 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
SK-132995 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
635-320-71 Huntington Ingalls Inc Div Newport News Shipbuilding (USA)
Related Parts
4320-00-218-3387INTERCHANGEABLE
RING,WEARING
310P

Frequently Asked Questions

What is NSN 4320-00-218-3386?

NSN 4320-00-218-3386 is a Ring,wearing, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-218-3386?

NSN 4320-00-218-3386 has 15 cross-referenced part numbers: SL5560PC71 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging), 309P (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging), SL6127PC71 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging), SL5077PC71 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging), SK-132995 (Curtiss-Wright Electro-Mechanical Corporation Div Epd) and 10 more.

What NSN replaces 4320-00-218-3386?

There is 1 known substitute for 4320-00-218-3386: 4320-00-218-3387. Verify interchangeability with system specifications before substitution.

What are the specifications of 309P?

Key specifications for 309P: Corner Shape: SQUARE INSIDE LEFT CORNER; Body Inside Diameter: 8.875 INCHES MINIMUM AND 8.876 INCHES MAXIMUM IN; Chamfer Angle: 45.0 DEGREES NOMINAL INSIDE RIGHT CORNER; Body Outside Diameter: 9.512 INCHES NOMINAL IN. 13 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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