The Ring,wearing, cataloged under National Stock Number 4320-00-979-3801, 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 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4320-00-979-3801 |
| Primary Part Number | 17686P |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Flange Diameter | 5.438 INCHES NOMINAL IN |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | ROUND INSIDE RIGHT CORNER |
| Corner Radius | 0.625 INCHES NOMINAL INSIDE RIGHT CORNER IN |
| Body Style | INTERNAL AND EXTERNAL FLANGE |
| Body Outside Diameter | 4.246 INCHES MINIMUM AND 4.248 INCHES MAXIMUM IN |
| Unthreaded Mounting Hole Diameter | 0.281 INCHES NOMINAL IN |
| Internal Flange Inside Diameter | 1.500 INCHES NOMINAL IN |
| Left Side Flange Thickness | 0.375 INCHES NOMINAL IN |
| Body Inside Diameter | 2.625 INCHES MINIMUM AND 2.627 INCHES MAXIMUM IN |
| Bolt Hole Quantity | 6 |
| Bolt Circle Diameter | 4.750 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Internal Flange Width | 0.406 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 |
|---|---|
| RY-134323 | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| 17686P PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| RY-134323 | 5/9 Secondary reference U.S. Government activity |
| 17686P | 3/9 Design control — primary reference U.S. Government activity |
NSN 4320-00-979-3801 is a Ring,wearing, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-979-3801 has 2 manufacturer part numbers on file: RY-134323 (Curtiss-Wright Electro-Mechanical Corporation Div Epd), 17686P (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 17686P: Flange Diameter: 5.438 INCHES NOMINAL IN; Corner Shape: SQUARE OUTSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE LEFT CORNER; Corner Shape: SQUARE INSIDE LEFT CORNER. 16 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.