NSN 4820-00-949-0256 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-949-0256. Manufacturer of record part number: 4J3003.
General Characteristics Item Description: STEEL,HARDNESS ROCKWELL 30N 73-77,0.500 IN. DIA 1.450 IN. DEEP,COUNTERBORE 0.781 IN. 0.857 IN. DEEP,O/A DIA. 1.007 IN. DIA BY 1.727 IN. LG IN
2 manufacturer part numbers on file
Manufacturer of record: Caterpillar Inc Div Caterpillar Defense
Identification
NSN: 4820-00-949-0256
NIIN: 009490256
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 4J3003
Manufacturer: Caterpillar Inc Div Caterpillar Defense
General Description
The Disc,valve, cataloged under National Stock Number 4820-00-949-0256, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 1 specification, 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-00-949-0256
Primary Part Number
4J3003
Item Name
Disc,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Caterpillar Inc Div Caterpillar Defense
Status
ACTIVE
General Characteristics Item Description
STEEL,HARDNESS ROCKWELL 30N 73-77,0.500 IN. DIA 1.450 IN. DEEP,COUNTERBORE 0.781 IN. 0.857 IN. DEEP,O/A DIA. 1.007 IN. DIA BY 1.727 IN. LG IN
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-00-949-0256?
NSN 4820-00-949-0256 is a Disc,valve, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-949-0256?
NSN 4820-00-949-0256 has 2 manufacturer part numbers on file: 11615289 (U S Army Tank Automotive Command Amsta-Im-Mm), 4J3003 (Caterpillar Inc Div Caterpillar Defense).
What are the specifications of 4J3003?
Key specifications for 4J3003: General Characteristics Item Description: STEEL,HARDNESS ROCKWELL 30N 73-77,0.500 IN. DIA 1.450 IN. DEEP,COUNTERBORE 0.781 IN. 0.857 IN. DEEP,O/A DIA. 1.007 IN. DIA BY 1.727 IN. LG IN. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-00-949-0256 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.