The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-553-6490, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Deere & Co. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-553-6490 |
| Primary Part Number | AT307811 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Deere & Co |
| Status | ACTIVE |
| 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 |
|---|---|
| AT307811 | Rdo Equipment Rdo Equipment Pty Ltd (AUS) |
| AT307811 PRIMARY | Deere & Co (USA) |
| AT307811 | Rdo Equipment Pty Ltd (AUS) |
| Reference | Meaning |
|---|---|
| AT307811 | 5/9 Secondary reference Rdo Equipment Pty Ltd |
| AT307811 | 5/9 Secondary reference Hitachi Construction Machinery Aust Australia Pty Ltd Hitachi Construction Machinery |
NSN 4820-01-553-6490 is a Valve,relief,pressure and Temper, manufactured by Deere & Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-553-6490 has 3 manufacturer part numbers on file: AT307811 (Rdo Equipment Rdo Equipment Pty Ltd), AT307811 (Deere & Co), AT307811 (Rdo Equipment Pty Ltd).
Key specifications for AT307811: Part Name Assigned by Controlling Agency: VALVE, PRESSURE REDUCING; End Item Identification: MOTOR GRADER, MODELS 670D/672D. 0 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.