The Ring,wearing, cataloged under National Stock Number 4320-00-684-0450, 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 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4320-00-684-0450 |
| Primary Part Number | SK-157449 |
| 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 ALL CORNERS |
| Body Style | PLAIN |
| Body Outside Diameter | 8.885 INCHES NOMINAL IN |
| Groove Depth | 0.063 INCHES NOMINAL IN |
| Distance From End to Groove Center | 0.594 INCHES NOMINAL IN |
| Groove Quantity | 4 |
| Body Inside Diameter | 10.500 INCHES MINIMUM AND 10.501 INCHES MAXIMUM IN |
| Material | COPPER ALLOY |
| Groove 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 |
|---|---|
| SK-157449 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| 17099-P PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| SK-157449 | 5/9 Secondary reference U.S. Government activity |
| 17099-P | 5/9 Secondary reference U.S. Government activity |
NSN 4320-00-684-0450 is a Ring,wearing, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-684-0450 has 2 manufacturer part numbers on file: SK-157449 (Curtiss-Wright Electro-Mechanical Corporation Div Epd), 17099-P (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for SK-157449: Surface Finish: 125.0 MICROINCHES ALL SURFACES; Corner Shape: SQUARE ALL CORNERS; Body Style: PLAIN; Body Outside Diameter: 8.885 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.