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NSN 4820-01-503-4545Government record, cited
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Seat, Valve4820-01-503-4545

NSN 4820-01-503-4545 · NIIN 015034545 · Part number 51203-H-652
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 76364
Government record, cited
NSN 4820-01-503-4545 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-503-4545. Manufacturer of record part number: 51203-H-652.
Also searched as  4820-01-503-4545 · 4820015034545 · NIIN 015034545 · 01-503-4545 · FSC 4820 Valves, Nonpowered · CAGE 76364 · 51203-H-652 · 714-001T · 714-001T 1-1/2IN ITEM 6
Nearby stock numbers  ·
GATE VALVE PROFILE
4820-01-503-4545 — Valves, Nonpowered
Features
  • Seat,valve — FSC 4820
  • 2 manufacturer part numbers on file
  • Manufacturer of record: Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
Identification
  • NSN: 4820-01-503-4545
  • NIIN: 015034545
  • FSC: 4820 — Valves, Nonpowered
  • FSG: 48 — Valves
  • Primary part number: 51203-H-652
  • Manufacturer: Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-503-4545, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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 NameSeat,valve
FSC / FSG4820 — Valves, Nonpowered (FSG 48)
ManufacturersMilwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (CAGE 76364)
Technical Specifications
ParameterValue
NSN4820-01-503-4545
Primary Part Number51203-H-652
Item NameSeat,valve
FSC / FSG4820 / 48 — Valves, Nonpowered
ManufacturerMilwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-503-4821714-001T 112 POSSIBLE MATCH
VALVE,GATE
Possible match (shared part number)Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
4820-01-505-119226519-FX-652 POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
4820-01-505-128751203-F-652 POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
4820-01-505-162436106-E-650 POSSIBLE MATCH
FLANGE,GLAND,VALVE
Possible match (shared part number)Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
4820-01-505-1676714-001T 100 POSSIBLE MATCH
VALVE,GATE
Possible match (shared part number)Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
4820-01-505-30664122-F-210 POSSIBLE MATCH
GUIDE,VALVE STEM
Possible match (shared part number)Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
Cross-Reference Index
Part NumberManufacturer
51203-H-652 PRIMARY Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
714-001T 1-1/2IN ITEM 6 Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
Reference documents
ReferenceMeaning
714-001T D/9 Drawing number reference only
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
Related Parts
4820-01-503-4821POSSIBLE MATCH
VALVE,GATE
714-001T 112
4820-01-505-1192POSSIBLE MATCH
STEM,FLUID VALVE
26519-FX-652
4820-01-505-1287POSSIBLE MATCH
SEAT,VALVE
51203-F-652
4820-01-505-1624POSSIBLE MATCH
FLANGE,GLAND,VALVE
36106-E-650
4820-01-505-1676POSSIBLE MATCH
VALVE,GATE
714-001T 100
4820-01-505-3066POSSIBLE MATCH
GUIDE,VALVE STEM
4122-F-210

Frequently Asked Questions

What is NSN 4820-01-503-4545?

NSN 4820-01-503-4545 is a Seat,valve, manufactured by Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-503-4545?

NSN 4820-01-503-4545 has 2 manufacturer part numbers on file: 51203-H-652 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 714-001T 1-1/2IN ITEM 6 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc).

What NSN replaces 4820-01-503-4545?

6 possible matches (shared part number, not a government interchangeability claim): 4820-01-503-4821, 4820-01-505-1192, 4820-01-505-1287. Verify interchangeability with system specifications before substitution.

Is NSN 4820-01-503-4545 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.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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