The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-509-0299, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-509-0299 |
| Primary Part Number | 263-9657 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| 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 |
|---|---|
| 263-9657 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 106-7388 | 5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense |
NSN 4820-01-509-0299 is a Valve,relief,pressure and Temper, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-509-0299 has 1 manufacturer part number on file: 263-9657 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 263-9657: Special Features: CONTAINS P/N 114-6635 RETAINER, P/N 2P-1279 LOCKNUT (9/16-18 THD), P/N 3J-1907 2-SEAL-O-RING (11.89 MM ID), P/N 9T-2659 SPRING, P/N 6E-3006 BODY, P/N 131-8777 VALVE, P/N 4D-2297 SEAL-O-RING (15.60MM ID), P/N 2A-3211 WASHER A; Part Name Assigned by Controlling Agency: VALVE GROUP RELIEF (BLADE TIP); End Item Identification: BULLDOZER MODEL D5MC. 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.