The Ring,wearing, cataloged under National Stock Number 4320-00-684-0448, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings). Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-684-0448 |
| Primary Part Number | CS4320-0187 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES ALL SURFACES |
| Corner Shape | SQUARE ALL CORNERS |
| Body Style | PLAIN W/INTERNAL FLANGE |
| Body Outside Diameter | 6.748 INCHES MINIMUM AND 6.749 INCHES MAXIMUM IN |
| Unthreaded Mounting Hole Diameter | 0.281 INCHES NOMINAL IN |
| Internal Flange Inside Diameter | 4.625 INCHES NOMINAL IN |
| Body Inside Diameter | 5.970 INCHES NOMINAL IN |
| Bolt Hole Quantity | 8 |
| Bolt Circle Diameter | 5.375 INCHES NOMINAL IN |
| Countersink Angle | 40.0 DEGREES MINIMUM AND 41.0 DEGREES MAXIMUM |
| Material | COPPER ALLOY |
| Internal Flange Width | 0.375 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 |
|---|---|
| CS4320-0187 PRIMARY | Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) (USA) |
| 17091P PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| RY118749 | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| 17091P | 5/9 Secondary reference U.S. Government activity |
| RY118749 | 5/9 Secondary reference U.S. Government activity |
NSN 4320-00-684-0448 is a Ring,wearing, manufactured by Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings), classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-684-0448 has 3 manufacturer part numbers on file: CS4320-0187 (Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings)), 17091P (Curtiss-Wright Electro-Mechanical Corporation Div Epd), RY118749 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for CS4320-0187: Surface Finish: 125.0 MICROINCHES ALL SURFACES; Corner Shape: SQUARE ALL CORNERS; Body Style: PLAIN W/INTERNAL FLANGE; Body Outside Diameter: 6.748 INCHES MINIMUM AND 6.749 INCHES MAXIMUM IN. 12 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.