The Ring,wearing, cataloged under National Stock Number 4320-00-398-8002, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-398-8002 |
| Primary Part Number | 511P |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES ALL SURFACES |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | CHAMFERED INSIDE RIGHT CORNER |
| Distance Between Flanges | 0.562 INCHES NOMINAL IN |
| Chamfer Length | 0.125 INCHES NOMINAL INSIDE RIGHT CORNER IN |
| Internal Flange Outside Diameter | 5.391 INCHES NOMINAL IN |
| Body Style | INTERNAL FLANGE W/EXTERNAL LOCKING FLANGE |
| Internal Flange Lip Width | 0.562 INCHES NOMINAL IN |
| Distance From End | 0.375 INCHES NOMINAL IN |
| Body Outside Diameter | 7.248 INCHES NOMINAL IN |
| End to Flange Distance | 0.813 INCHES NOMINAL IN |
| Internal Flange Inside Diameter | 4.875 INCHES NOMINAL IN |
| Left Side Flange Thickness | 0.375 INCHES NOMINAL IN |
| Distance Below Centerline | 0.125 INCHES NOMINAL IN |
| Body Inside Diameter | 6.470 INCHES NOMINAL IN |
| Right Side Flange Thickness | 0.375 INCHES NOMINAL IN |
| Smallest External Anchor Flange Radius | 3.500 INCHES NOMINAL IN |
| Chamfer Angle | 45.0 DEGREES NOMINAL INSIDE RIGHT CORNER |
| Material | NICKEL ALLOY |
| Internal Flange Width | 1.375 INCHES NOMINAL IN |
| Largest External Anchor Flange Radius | 3.875 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| SL4941PC50 | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| 511P PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| SL6083PC50 | 5/9 Secondary reference U.S. Government activity |
| 511P | 3/9 Design control — primary reference U.S. Government activity |
| 254941-13 | 5/9 Secondary reference U.S. Government activity |
| SL4941PC50 | 5/9 Secondary reference U.S. Government activity |
NSN 4320-00-398-8002 is a Ring,wearing, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-398-8002 has 2 manufacturer part numbers on file: SL4941PC50 (Curtiss-Wright Electro-Mechanical Corporation Div Epd), 511P (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 511P: Surface Finish: 125.0 MICROINCHES ALL SURFACES; Corner Shape: SQUARE OUTSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE LEFT CORNER; Corner Shape: SQUARE INSIDE LEFT CORNER. 23 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.