The Seat and Filter, cataloged under National Stock Number 4820-01-034-3681, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-034-3681 |
| Primary Part Number | 728872-1 |
| Item Name | Seat and Filter |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| General Characteristics Item Description | CRES AMS 5512 AND AMS 5646,1.200IN. MIN. 1.250 IN. MAX. O/A LG,0.438 IN. MIN. 0.446 IN. MAX. O/A DIA. SEAT,100.0 BY 100.0 MESH,0.0045 WIRE DIA,PLAIN WEAVE,STAINLESS STEEL FILTER IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 728872-1 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| Reference | Meaning |
|---|---|
| 4820PL0735181 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4820-01-034-3681 is a Seat and Filter, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-034-3681 has 1 manufacturer part number on file: 728872-1 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
Key specifications for 728872-1: General Characteristics Item Description: CRES AMS 5512 AND AMS 5646,1.200IN. MIN. 1.250 IN. MAX. O/A LG,0.438 IN. MIN. 0.446 IN. MAX. O/A DIA. SEAT,100.0 BY 100.0 MESH,0.0045 WIRE DIA,PLAIN WEAVE,STAINLESS STEEL FILTER IN; End Item Identification: ACFT F5F. 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.