NSN 4820-00-306-1280 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-306-1280. Manufacturer of record part number: 20511.
Stem Actuating End Type: SLOTTED AND THREADED INTERNALLY
Material: STEEL
1 manufacturer part number on file
Manufacturer of record: Grove Valve Operations
Identification
NSN: 4820-00-306-1280
NIIN: 003061280
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 20511
Manufacturer: Grove Valve Operations
General Description
The Stem,fluid Valve, cataloged under National Stock Number 4820-00-306-1280, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Grove Valve Operations. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 12 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-00-306-1280
Primary Part Number
20511
Item Name
Stem,fluid Valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Grove Valve Operations
Status
ACTIVE
Largest Outside Diameter
0.316 INCHES NOMINAL IN
Stem Actuating End Type
SLOTTED AND THREADED INTERNALLY
Material
STEEL
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items12
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-00-388-08130X20511POSSIBLE MATCH
STEM,NEEDLE VALVE
Possible match (shared part number)Grove Valve Operations
2510-00-395-4760POSSIBLE MATCH
HANDLE,LOCKING
Possible match (shared part number)
5940-00-543-84137203693P1POSSIBLE MATCH
TERMINAL,STUD
Possible match (shared part number)Lockheed Martin Corporation Div Rms
2520-00-569-9934POSSIBLE MATCH
SIDE GEAR,DIFFERENT
Possible match (shared part number)
5950-00-810-1254205-11POSSIBLE MATCH
COIL,RADIO FREQUENCY
Possible match (shared part number)Wilco Corp
2530-00-884-5519630161POSSIBLE MATCH
CAP,GREASE
Possible match (shared part number)Am General Llc
1650-00-894-458520511POSSIBLE MATCH
FILTER ELEMENT,FLUID
Possible match (shared part number)Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div
5950-00-897-6387SM-D-374904POSSIBLE MATCH
COIL,ELECTRICAL
Possible match (shared part number)Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
2910-01-165-494220511POSSIBLE MATCH
PARTS KIT,METERING AND DISTRIBUT
Possible match (shared part number)Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
1650-01-183-024020511POSSIBLE MATCH
CYLINDER,ACTUATING,LINEAR
Possible match (shared part number)Real-Time Laboratories, Llc
C/1Advisory reference — outside the item-of-supply concept
Grove Valve Operations
Related Parts
4820-00-388-0813POSSIBLE MATCH
STEM,NEEDLE VALVE
0X20511
2510-00-395-4760POSSIBLE MATCH
HANDLE,LOCKING
5940-00-543-8413POSSIBLE MATCH
TERMINAL,STUD
7203693P1
2520-00-569-9934POSSIBLE MATCH
SIDE GEAR,DIFFERENT
5950-00-810-1254POSSIBLE MATCH
COIL,RADIO FREQUENCY
205-11
2530-00-884-5519POSSIBLE MATCH
CAP,GREASE
630161
1650-00-894-4585POSSIBLE MATCH
FILTER ELEMENT,FLUID
20511
5950-00-897-6387POSSIBLE MATCH
COIL,ELECTRICAL
SM-D-374904
2910-01-165-4942POSSIBLE MATCH
PARTS KIT,METERING AND DISTRIBUT
20511
1650-01-183-0240POSSIBLE MATCH
CYLINDER,ACTUATING,LINEAR
20511
5120-01-192-4963POSSIBLE MATCH
PLIERS
5340-01-260-3313POSSIBLE MATCH
PANEL,BLANK
20511-401
Frequently Asked Questions
What is NSN 4820-00-306-1280?
NSN 4820-00-306-1280 is a Stem,fluid Valve, manufactured by Grove Valve Operations, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-306-1280?
NSN 4820-00-306-1280 has 1 manufacturer part number on file: 20511 (Grove Valve Operations).
What NSN replaces 4820-00-306-1280?
12 possible matches (shared part number, not a government interchangeability claim): 4820-00-388-0813, 2510-00-395-4760, 5940-00-543-8413. Verify interchangeability with system specifications before substitution.
What are the specifications of 20511?
Key specifications for 20511: Largest Outside Diameter: 0.316 INCHES NOMINAL IN; Stem Actuating End Type: SLOTTED AND THREADED INTERNALLY; Overall Length: 1.995 INCHES NOMINAL IN; Material: STEEL. 3 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-306-1280 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.