PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1012PRing,wearing

Curtiss-Wright Electro-Mechanical Corporation Div Epd · NSN 4320-00-398-7950 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-398-7950 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-398-7950. Primary manufacturer part number: 1012P.
Features
  • Ring,wearing — FSC 4320
  • Counterbore Depth: 0.281 INCHES NOMINAL IN
  • Bolt Circle Diameter: 5.500 INCHES NOMINAL IN
  • Bolt Hole Quantity: 6
  • Corner Shape: CHAMFERED OUTSIDE RIGHT CORNER
  • Corner Shape: SQUARE OUTSIDE LEFT CORNER
  • Internal Flange Width: 0.438 INCHES NOMINAL IN
  • Unthreaded Mounting Hole Diameter: 0.281 INCHES NOMINAL IN
Applications
  • Applications requiring Nickel Alloy construction
General Description

The Ring,wearing, cataloged under National Stock Number 4320-00-398-7950, 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 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-398-7950
Primary Part Number1012P
Item NameRing,wearing
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerCurtiss-Wright Electro-Mechanical Corporation Div Epd
StatusACTIVE
Counterbore Depth0.281 INCHES NOMINAL IN
Bolt Circle Diameter5.500 INCHES NOMINAL IN
Bolt Hole Quantity6
Corner ShapeCHAMFERED OUTSIDE RIGHT CORNER
Corner ShapeSQUARE OUTSIDE LEFT CORNER
Internal Flange Width0.438 INCHES NOMINAL IN
Unthreaded Mounting Hole Diameter0.281 INCHES NOMINAL IN
MaterialNICKEL ALLOY
Corner ShapeSQUARE INSIDE LEFT CORNER
Body Outside Diameter6.623 INCHES NOMINAL IN
Counterbore Diameter0.438 INCHES NOMINAL IN
Body Inside Diameter6.095 INCHES NOMINAL IN
Chamfer Angle30.0 DEGREES NOMINAL OUTSIDE RIGHT CORNER
Internal Flange Inside Diameter4.750 INCHES NOMINAL IN
Chamfer Length0.250 INCHES NOMINAL OUTSIDE RIGHT CORNER IN
Body StylePLAIN W/INTERNAL FLANGE
Corner ShapeSQUARE INSIDE RIGHT CORNER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
3455-00-232-409319941 INTERCHANGEABLE
Reamer,machine
Brown & Sharpe, Inc. Div Precision Measuring Instruments, Tesa Usa
2520-00-508-15662-0053 INTERCHANGEABLE
Spider,universal Joint,vehicular
Neapco Inc
4933-00-930-195710510981 INTERCHANGEABLE
Boresight Kit
General Dynamics Land Systems Canadacorp
2805-00-962-8842993P INTERCHANGEABLE
Piston,internal Combustion Engin
Federal-Mogul Corp Government Sales Dept
5950-01-185-9153L-0251 INTERCHANGEABLE
Coil,radio Frequency
L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications
3030-01-459-373610485 INTERCHANGEABLE
Belting,v
Defiance Machine and Tool Co Inc
5998-01-523-60190465453-01 INTERCHANGEABLE
Printed Circuit Board
Instruments Incorporated Dba Instruments Inc
Cross-Reference Index
Part NumberManufacturer
1012P PRIMARY Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA)
124176 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
SL4137PC29 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
SL6415PC36 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
1012P Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
SL5254PC36 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
1109P Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
SL6182PC36 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
10485 Rps-Fl, Inc. Dba Rps Inc (USA)
Related Parts
3455-00-232-4093INTERCHANGEABLE
REAMER,MACHINE
19941
2520-00-508-1566INTERCHANGEABLE
SPIDER,UNIVERSAL JOINT,VEHICULAR
2-0053
4933-00-930-1957INTERCHANGEABLE
BORESIGHT KIT
10510981
2805-00-962-8842INTERCHANGEABLE
PISTON,INTERNAL COMBUSTION ENGIN
993P
5950-01-185-9153INTERCHANGEABLE
COIL,RADIO FREQUENCY
L-0251
3030-01-459-3736INTERCHANGEABLE
BELTING,V
10485
5998-01-523-6019INTERCHANGEABLE
PRINTED CIRCUIT BOARD
0465453-01

Frequently Asked Questions

What is NSN 4320-00-398-7950?

NSN 4320-00-398-7950 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 4320-00-398-7950?

NSN 4320-00-398-7950 has 9 cross-referenced part numbers: 1012P (Curtiss-Wright Electro-Mechanical Corporation Div Epd), 124176 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging), SL4137PC29 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging), SL6415PC36 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging), 1012P (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging) and 4 more.

What NSN replaces 4320-00-398-7950?

There are 7 known substitutes for 4320-00-398-7950: 3455-00-232-4093, 2520-00-508-1566, 4933-00-930-1957 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1012P?

Key specifications for 1012P: Counterbore Depth: 0.281 INCHES NOMINAL IN; Bolt Circle Diameter: 5.500 INCHES NOMINAL IN; Bolt Hole Quantity: 6; Corner Shape: CHAMFERED OUTSIDE RIGHT CORNER. 18 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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