NSN 4820-01-453-6020 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-453-6020. Manufacturer of record part number: 1281-014 3IN.
Bolt Circle Nominal Diameter: 5.500 INCHES ALL ENDS IN
Connection Type: FLANGE ALL ENDS
Material Document and Classification: ASTM B-61 ASSN STD SINGLE MATERIAL RESPONSE BODY
Material Document and Classification: ASTM A-494 R -30C ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
Bolt Hole Nominal Diameter: 0.562 INCHES ALL ENDS IN
Operating Pressure: 100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Identification
NSN: 4820-01-453-6020
NIIN: 014536020
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 1281-014 3IN
Manufacturer: Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
General Description
The Valve,check, cataloged under National Stock Number 4820-01-453-6020, 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. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-453-6020
Primary Part Number
1281-014 3IN
Item Name
Valve,check
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
Status
ACTIVE
Flange Shape
ROUND WITH HOLES ALL ENDS
Bolt Circle Nominal Diameter
5.500 INCHES ALL ENDS IN
Connection Type
FLANGE ALL ENDS
Material Document and Classification
ASTM B-61 ASSN STD SINGLE MATERIAL RESPONSE BODY
Material Document and Classification
ASTM A-494 R -30C ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
Bolt Hole Nominal Diameter
0.562 INCHES ALL ENDS IN
Operating Pressure
100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
Reference documents
Reference
Meaning
1281-014-L-0001
D/9Drawing number reference only
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
No interchangeability data on file.
Other items in FSC 4820 — Valves, Nonpowered
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
Related Parts in Valves
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
8171E-1/4HS2
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
D559A3M2
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 4820-01-453-6020?
NSN 4820-01-453-6020 is a Valve,check, 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 4820-01-453-6020?
NSN 4820-01-453-6020 has 1 manufacturer part number on file: 1281-014 3IN (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc).
What are the specifications of 1281-014 3IN?
Key specifications for 1281-014 3IN: Flange Shape: ROUND WITH HOLES ALL ENDS; Bolt Circle Nominal Diameter: 5.500 INCHES ALL ENDS IN; Connection Type: FLANGE ALL ENDS; Material Document and Classification: ASTM B-61 ASSN STD SINGLE MATERIAL RESPONSE BODY. 13 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-453-6020 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.