The Ring,wearing, cataloged under National Stock Number 4320-00-959-0306, 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 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4320-00-959-0306 |
| Primary Part Number | 17655P |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Flange Diameter | 6.124 INCHES NOMINAL IN |
| Corner Shape | SQUARE ALL CORNERS |
| Body Style | EXTERNAL FLANGE |
| Body Outside Diameter | 4.729 INCHES NOMINAL IN |
| Unthreaded Mounting Hole Diameter | 0.344 INCHES NOMINAL IN |
| Left Side Flange Thickness | 0.562 INCHES NOMINAL IN |
| Body Inside Diameter | 4.376 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Bolt Circle Diameter | 5.437 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| CS4320-0091 | Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) (USA) |
| 17655P PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| SK171558 | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| 17655P | 3/9 Design control — primary reference U.S. Government activity |
| SK171558 | 5/9 Secondary reference U.S. Government activity |
NSN 4320-00-959-0306 is a Ring,wearing, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-959-0306 has 3 manufacturer part numbers on file: CS4320-0091 (Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings)), 17655P (Curtiss-Wright Electro-Mechanical Corporation Div Epd), SK171558 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 17655P: Flange Diameter: 6.124 INCHES NOMINAL IN; Corner Shape: SQUARE ALL CORNERS; Body Style: EXTERNAL FLANGE; Body Outside Diameter: 4.729 INCHES NOMINAL IN. 10 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.