The Stem,fluid Valve, cataloged under National Stock Number 4820-01-446-4639, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Newmans Inc New Jersey Div. Government technical data includes 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-446-4639 |
| Primary Part Number | 1 1/2IN 28S-FS2 ITEM 3 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Newmans Inc New Jersey Div |
| Status | ACTIVE |
| Valve Type for Which Designed | GLOBE |
| Stem Actuating End Type | THREADED EXTERNALLY |
| Valve Model Number for Which Designed | 28S-FS2 |
| Material Document and Classification | ASTM A276-410 ASSN STD SINGLE MATERIAL RESPONSE |
| Valve Size for Which Designed | 1.500 INCHES IN |
| Material | STEEL COMP 410 |
| 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 |
|---|---|
| 1 1/2IN 28S-FS2 ITEM 3 PRIMARY | Newmans Inc New Jersey Div (USA) |
| Reference | Meaning |
|---|---|
| A-0018-00 1.50IN IT3 | 5/9 Secondary reference Key Industries Inc Dba Liberty Equipment and Supply Co |
| A-0018-00 | D/9 Drawing number reference only Newmans Inc New Jersey Div |
| 1 1/2IN 28S-FS2 ITEM 3 | 5/9 Secondary reference Key Industries Inc Dba Liberty Equipment and Supply Co |
NSN 4820-01-446-4639 is a Stem,fluid Valve, manufactured by Newmans Inc New Jersey Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-446-4639 has 1 manufacturer part number on file: 1 1/2IN 28S-FS2 ITEM 3 (Newmans Inc New Jersey Div).
6 possible matches (shared part number, not a government interchangeability claim): 4820-01-446-4640, 4820-01-446-4642, 4820-01-446-4643. Verify interchangeability with system specifications before substitution.
Key specifications for 1 1/2IN 28S-FS2 ITEM 3: Valve Type for Which Designed: GLOBE; Stem Actuating End Type: THREADED EXTERNALLY; Valve Model Number for Which Designed: 28S-FS2; Material Document and Classification: ASTM A276-410 ASSN STD SINGLE MATERIAL RESPONSE. 6 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.