PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-C-1203Cock,plug

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 4820-00-272-3354 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-272-3354 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-272-3354. Primary manufacturer part number: MIL-C-1203.
Features
  • Cock,plug — FSC 4820
  • Thread Direction: RIGHT-HAND ALL ENDS
  • Connection Type: THREADED INTERNAL PIPE ALL ENDS
  • Flow Style: TWO WAY TWO PORT 360 DEGREE PLUG TURN
  • Connection Style: PLAIN, OPTIONAL END (PIPE) ALL ENDS
  • Maximum Operating Temp: 180.0 FAHRENHEIT SINGLE RESPONSE DEGF
  • Valve Operation Method: MANUAL
  • Thread Series Designator: NPTF ALL ENDS
Applications
  • Applications requiring Copper Alloy Overall construction
General Description

The Cock,plug, cataloged under National Stock Number 4820-00-272-3354, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-272-3354
Primary Part NumberMIL-C-1203
Item NameCock,plug
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Thread DirectionRIGHT-HAND ALL ENDS
Connection TypeTHREADED INTERNAL PIPE ALL ENDS
Flow StyleTWO WAY TWO PORT 360 DEGREE PLUG TURN
Connection StylePLAIN, OPTIONAL END (PIPE) ALL ENDS
Maximum Operating Temp180.0 FAHRENHEIT SINGLE RESPONSE DEGF
Valve Operation MethodMANUAL
Thread Series DesignatorNPTF ALL ENDS
Operating Pressure125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nominal Thread Size0.375 INCHES ALL ENDS IN
Media for Which DesignedWATER-OIL-GAS SINGLE RESPONSE
MaterialCOPPER ALLOY OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
6210-00-168-069480412 INTERCHANGEABLE
Insert,legend,light Indicator
Ant Company of VA, the
5330-00-285-3588 INTERCHANGEABLE
Gasket
5120-00-473-70595602860 INTERCHANGEABLE
Fixture Timing
U S Army Tank Automotive Command Amsta-Im-Mm
5120-00-496-1559250-38 INTERCHANGEABLE
Needle,burner Clean
Hauck Manufacturing Company
3120-00-662-8105 INTERCHANGEABLE
Bearing,washer,thrust
5365-01-198-164880412 INTERCHANGEABLE
Spacer,ring
Lourdes Industries, Inc.
5962-01-208-8541 INTERCHANGEABLE
Microcircuit,digital
5220-01-213-320880412 INTERCHANGEABLE
Plate,surface
Starrett L S the Co Starrett Granite Surface Plate Div
6625-01-258-7609 INTERCHANGEABLE
Ammeter
4730-01-415-477925038 INTERCHANGEABLE
Restrictor Unit,fluid Flow
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Cross-Reference Index
Part NumberManufacturer
MIL-C-1203 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS35931-3 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
804-1-2 Crane Co Div Valve Div (USA)
250-3-8 Crane Co Div Valve Div (USA)
250 Crane Co Div Valve Div (USA)
554 Crane Co Div Valve Div (USA)
Related Parts
6210-00-168-0694INTERCHANGEABLE
INSERT,LEGEND,LIGHT INDICATOR
80412
5330-00-285-3588INTERCHANGEABLE
GASKET
5120-00-473-7059INTERCHANGEABLE
FIXTURE TIMING
5602860
5120-00-496-1559INTERCHANGEABLE
NEEDLE,BURNER CLEAN
250-38
3120-00-662-8105INTERCHANGEABLE
BEARING,WASHER,THRUST
5365-01-198-1648INTERCHANGEABLE
SPACER,RING
80412
5962-01-208-8541INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
5220-01-213-3208INTERCHANGEABLE
PLATE,SURFACE
80412
6625-01-258-7609INTERCHANGEABLE
AMMETER
4730-01-415-4779INTERCHANGEABLE
RESTRICTOR UNIT,FLUID FLOW
25038
4820-01-417-7544INTERCHANGEABLE
SHROUD,QUIET PRESSURE RELIEF VAL
25038-1006-1
4810-01-493-4638INTERCHANGEABLE
SLIDE,DIRECTIONAL CONTROL LINEAR
25038 FIND 13

Frequently Asked Questions

What is NSN 4820-00-272-3354?

NSN 4820-00-272-3354 is a Cock,plug, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-272-3354?

NSN 4820-00-272-3354 has 6 cross-referenced part numbers: MIL-C-1203 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS35931-3 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 804-1-2 (Crane Co Div Valve Div), 250-3-8 (Crane Co Div Valve Div), 250 (Crane Co Div Valve Div) and 1 more.

What NSN replaces 4820-00-272-3354?

There are 12 known substitutes for 4820-00-272-3354: 6210-00-168-0694, 5330-00-285-3588, 5120-00-473-7059 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-C-1203?

Key specifications for MIL-C-1203: Thread Direction: RIGHT-HAND ALL ENDS; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Flow Style: TWO WAY TWO PORT 360 DEGREE PLUG TURN; Connection Style: PLAIN, OPTIONAL END (PIPE) ALL ENDS. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-272-3354 still in active supply?

NSN 4820-00-272-3354 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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