The Valve,safety Relief, cataloged under National Stock Number 4820-01-102-0530, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hydraulics International Inc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-102-0530 |
| Primary Part Number | 00993-284-4 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hydraulics International Inc |
| Status | ACTIVE |
| Flow Control Device | PISTON |
| Connection Style | GASKET SEAL(BOSS) ALL ENDS |
| Connection Type | THREADED INTERNAL BOSS ALL ENDS |
| Style Designator | STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF SEPARABLE SECTIONS. |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.563 INCHES ALL ENDS IN |
| Thread Class | 2B ALL ENDS |
| Material | ALUMINUM ALLOY BODY |
| Thread Series Designator | UNF ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 00993-284-4 PRIMARY | Hydraulics International Inc (USA) |
| 00993-284-4 | Hydraulics International, Inc. Dba Hydraulics International Inc (USA) |
| Reference | Meaning |
|---|---|
| 65C35628-3 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 1LL22-F6T40-S | 5/9 Secondary reference Danfoss Fluid Power Inc Easley Opn |
| 65C35628-3 | 7/2 Vendor item drawing reference Air Armament Center/ En |
NSN 4820-01-102-0530 is a Valve,safety Relief, manufactured by Hydraulics International Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-102-0530 has 2 manufacturer part numbers on file: 00993-284-4 (Hydraulics International Inc), 00993-284-4 (Hydraulics International, Inc. Dba Hydraulics International Inc).
Key specifications for 00993-284-4: Flow Control Device: PISTON; Connection Style: GASKET SEAL(BOSS) ALL ENDS; Connection Type: THREADED INTERNAL BOSS ALL ENDS; Style Designator: STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF SEPARABLE SECTIONS.. 10 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.