The Plunger,unloader, cataloged under National Stock Number 4310-01-198-4332, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Ingersoll-Rand Company Dba Ingersoll-Rand. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-01-198-4332 |
| Primary Part Number | 3W21457 |
| Item Name | Plunger,unloader |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Ingersoll-Rand Company Dba Ingersoll-Rand |
| Status | ACTIVE |
| General Characteristics Item Description | STAINLESS STEEL |
| 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 |
|---|---|
| 3W21457 PRIMARY | Ingersoll-Rand Company Dba Ingersoll-Rand (USA) |
| Reference | Meaning |
|---|---|
| 3W21457 | C/1 Advisory reference — outside the item-of-supply concept Ingersoll Rand Co |
| 30285688 | C/1 Advisory reference — outside the item-of-supply concept Ingersoll-Rand Company Dba Ingersoll-Rand |
| 30285688 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 3W21457 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4310-01-198-4332 is a Plunger,unloader, manufactured by Ingersoll-Rand Company Dba Ingersoll-Rand, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-01-198-4332 has 1 manufacturer part number on file: 3W21457 (Ingersoll-Rand Company Dba Ingersoll-Rand).
1 possible match (shared part number, not a government interchangeability claim): 4310-01-254-1537. Verify interchangeability with system specifications before substitution.
Key specifications for 3W21457: General Characteristics Item Description: STAINLESS STEEL. 1 specification is 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.