NSN 4820-01-491-2784 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-491-2784. Manufacturer of record part number: P10768A.
Manufacturer of record: Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Identification
NSN: 4820-01-491-2784
NIIN: 014912784
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: P10768A
Manufacturer: Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
General Description
The Disk,valve, cataloged under National Stock Number 4820-01-491-2784, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Disk,valve
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Manufacturers
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (CAGE 55378)
Technical Specifications
Parameter
Value
NSN
4820-01-491-2784
Primary Part Number
P10768A
Item Name
Disk,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Status
ACTIVE
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 Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-491-3555POSSIBLE MATCH
RETAINER,DISK,VALVE
Possible match (shared part number)
4310-01-491-3580P10775A-00POSSIBLE MATCH
PLATE,VALVE STOP
Possible match (shared part number)Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-491-3725POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)
5340-01-491-4189POSSIBLE MATCH
RETAINER,HELICAL COMPRESSION SPR
Possible match (shared part number)
5365-01-513-7688P-10768-APOSSIBLE MATCH
SPACER,SPECIAL SHAPED
Possible match (shared part number)Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Reference documents
Reference
Meaning
MIL-V-2042
4/1Identification reference
U.S. Government activity
P10768A
5/9Secondary reference
Atlas Valve Co
NAP-957 FIND NO. 8
5/9Secondary reference
Atlas Valve Co
NAP957
D/9Drawing number reference only
Atlas Valve Co
Related Parts
4820-01-491-3555POSSIBLE MATCH
RETAINER,DISK,VALVE
4310-01-491-3580POSSIBLE MATCH
PLATE,VALVE STOP
P10775A-00
4820-01-491-3725POSSIBLE MATCH
STEM,FLUID VALVE
5340-01-491-4189POSSIBLE MATCH
RETAINER,HELICAL COMPRESSION SPR
5365-01-513-7688POSSIBLE MATCH
SPACER,SPECIAL SHAPED
P-10768-A
Frequently Asked Questions
What is NSN 4820-01-491-2784?
NSN 4820-01-491-2784 is a Disk,valve, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-491-2784?
NSN 4820-01-491-2784 has 1 manufacturer part number on file: P10768A (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
What NSN replaces 4820-01-491-2784?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-491-3555, 4310-01-491-3580, 4820-01-491-3725. Verify interchangeability with system specifications before substitution.
Is NSN 4820-01-491-2784 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.