The Head and Disk,safety,pressure Re, cataloged under National Stock Number 4820-01-287-0509, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fike Corporation. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-287-0509 |
| Primary Part Number | A4534-1 |
| Item Name | Head and Disk,safety,pressure Re |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fike Corporation |
| Status | ACTIVE |
| Burst Pressure | 4000.0 PRESSURE POUNDS PER SQUARE INCH GAGE |
| Head Type | SCREW |
| Criticality Code Justification | FEAT |
| Burst Temperature | 72.0 FAHRENHEIT DEGF |
| Head Material | STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| A4534-1 PRIMARY | Fike Corporation (USA) |
| 65A102-C104-1 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 65A102-C104 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 65A102-C104-1 | 5/9 Secondary reference William F Ruckle Dba Ruckle Manufacturing |
NSN 4820-01-287-0509 is a Head and Disk,safety,pressure Re, manufactured by Fike Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-287-0509 has 3 manufacturer part numbers on file: A4534-1 (Fike Corporation), 65A102-C104-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 65A102-C104 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for A4534-1: Burst Pressure: 4000.0 PRESSURE POUNDS PER SQUARE INCH GAGE; Head Type: SCREW; Criticality Code Justification: FEAT; Burst Temperature: 72.0 FAHRENHEIT DEGF. 5 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 4820-01-287-0509 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.