The Ring,wearing, cataloged under National Stock Number 4320-00-689-2809, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Ampco Pumps Company Llc. Government technical data includes 11 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-689-2809 |
| Primary Part Number | BW8100112 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Ampco Pumps Company Llc |
| Status | ACTIVE |
| Corner Shape | SQUARE INSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | CHAMFERED OUTSIDE LEFT CORNER |
| Chamfer Length | 0.063 INCHES NOMINAL OUTSIDE LEFT CORNER IN |
| Body Style | PLAIN |
| Body Outside Diameter | 3.375 INCHES NOMINAL IN |
| Criticality Code Justification | FEAT |
| Body Inside Diameter | 2.781 INCHES NOMINAL IN |
| Chamfer Angle | 45.0 DEGREES NOMINAL OUTSIDE LEFT 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 | Y |
| Part Number | Manufacturer |
|---|---|
| BW8100112 PRIMARY | Ampco Pumps Company Llc (USA) |
| Reference | Meaning |
|---|---|
| BW8100112 | 5/1 Secondary reference Calgon Carbon Uv Technologies Llc Dba Hyde Marine |
| 1-0011-02 | 5/9 Secondary reference Ampco Metal Inc. Dba Ampco Metal Inc |
| 610008100112 0. | C/1 Advisory reference — outside the item-of-supply concept Ampco Metal Inc. Dba Ampco Metal Inc |
| BW8100112 | 5/9 Secondary reference Ampco Metal Inc. Dba Ampco Metal Inc |
| 48-1-0011-02 | 5/9 Secondary reference Ampco Metal Inc. Dba Ampco Metal Inc |
NSN 4320-00-689-2809 is a Ring,wearing, manufactured by Ampco Pumps Company Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-689-2809 has 1 manufacturer part number on file: BW8100112 (Ampco Pumps Company Llc).
2 possible matches (shared part number, not a government interchangeability claim): 5905-00-924-6898, 2590-01-557-0181. Verify interchangeability with system specifications before substitution.
Key specifications for BW8100112: Corner Shape: SQUARE INSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE RIGHT CORNER; Corner Shape: SQUARE INSIDE LEFT CORNER; Corner Shape: CHAMFERED OUTSIDE LEFT CORNER. 11 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.