The Ring,wearing, cataloged under National Stock Number 4320-00-212-9529, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Fairbanks Morse, Llc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-212-9529 |
| Primary Part Number | F4C17BK |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | CHAMFERED INSIDE RIGHT CORNER |
| Corner Shape | CHAMFERED OUTSIDE RIGHT CORNER |
| Chamfer Length | 0.062 INCHES NOMINAL OUTSIDE RIGHT CORNER IN |
| Chamfer Length | 0.062 INCHES NOMINAL INSIDE RIGHT CORNER IN |
| Body Style | PLAIN |
| Body Outside Diameter | 5.014 INCHES NOMINAL IN |
| Material Document and Classification | MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE |
| Body Inside Diameter | 4.550 INCHES NOMINAL IN |
| Chamfer Angle | 45.0 DEGREES NOMINAL INSIDE RIGHT CORNER |
| Chamfer Angle | 45.0 DEGREES NOMINAL OUTSIDE RIGHT CORNER |
| 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 |
|---|---|
| F4C17BK PRIMARY | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| F4C17BK | 3/9 Design control — primary reference U.S. Government activity |
NSN 4320-00-212-9529 is a Ring,wearing, manufactured by Fairbanks Morse, Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-212-9529 has 1 manufacturer part number on file: F4C17BK (Fairbanks Morse, Llc).
Key specifications for F4C17BK: Corner Shape: SQUARE OUTSIDE LEFT CORNER; Corner Shape: SQUARE INSIDE LEFT CORNER; Corner Shape: CHAMFERED INSIDE RIGHT CORNER; Corner Shape: CHAMFERED OUTSIDE RIGHT CORNER. 13 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.