The Flange,inlet, cataloged under National Stock Number 4820-01-057-9536, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-057-9536 |
| Primary Part Number | 765656-4 |
| Item Name | Flange,inlet |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co |
| Status | ACTIVE |
| FSC Application Data | STAGE VALVE |
| General Characteristics Item Description | STEEL AMS 5646 PER HS178; HEAT TREAT HS 461,HARDNESS 75.5 R15N MAX; 1.960 IN. H; 3.073 IN. OUTSIDE DIA; NHA 765592-13 IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 765656-4 PRIMARY | Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co (USA) |
| 765656-4 | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| 765656-4 PRIMARY | Hoppe Technologies, Inc (USA) |
| 765656-4 PRIMARY | Tect Hypervelocity, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 765656-4 | 5/9 Secondary reference Hamlin Inc |
NSN 4820-01-057-9536 is a Flange,inlet, manufactured by Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-057-9536 has 4 manufacturer part numbers on file: 765656-4 (Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co), 765656-4 (Hamilton Sundstrand Corporation Dba Collins Aerospace), 765656-4 (Hoppe Technologies, Inc), 765656-4 (Tect Hypervelocity, Inc.).
Key specifications for 765656-4: FSC Application Data: STAGE VALVE; General Characteristics Item Description: STEEL AMS 5646 PER HS178; HEAT TREAT HS 461,HARDNESS 75.5 R15N MAX; 1.960 IN. H; 3.073 IN. OUTSIDE DIA; NHA 765592-13 IN; End Item Identification: ACFT,TYPE F-16A,B; T.O. 15A2-2- 187-3 A. 2 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.
NSN 4820-01-057-9536 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.