PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

377Valve,gate

William Powell Company, the Dba Powell Valve Div the Starflo Corporation · NSN 4820-00-956-6204 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-956-6204 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-956-6204. Primary manufacturer part number: 377.
Features
  • Valve,gate — FSC 4820
  • Connection Type: THREADED INTERNAL PIPE
  • Material: COPPER ALLOY BODY
  • Bonnet Type: INSIDE SCREW
  • Material Document and Classification: QQ-C-390,ALLOY D4 FED SPEC SINGLE MATERIAL RESPONSE BODY
  • Operating Pressure and Type: 300.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 600.0 POUNDS PER SQUARE INCH (PSI) WATER AND OTHER LIQUIDS MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
  • Thread Series Designator: NPT
  • Stem Type: RISING
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Body construction
General Description

The Valve,gate, cataloged under National Stock Number 4820-00-956-6204, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is William Powell Company, the Dba Powell Valve Div the Starflo Corporation. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 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
NSN4820-00-956-6204
Primary Part Number377
Item NameValve,gate
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerWilliam Powell Company, the Dba Powell Valve Div the Starflo Corporation
StatusCANCELLED
Connection TypeTHREADED INTERNAL PIPE
MaterialCOPPER ALLOY BODY
Bonnet TypeINSIDE SCREW
Material Document and ClassificationQQ-C-390,ALLOY D4 FED SPEC SINGLE MATERIAL RESPONSE BODY
Operating Pressure and Type300.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 600.0 POUNDS PER SQUARE INCH (PSI) WATER AND OTHER LIQUIDS MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
Thread Series DesignatorNPT
Stem TypeRISING
Nominal Thread Size0.250 INCHES IN
Features ProvidedBONNET PACKING
Bonnet Attachment MethodUNION
Valve Operation MethodMANUAL
MaterialCOPPER ALLOY SEAT
MaterialCOPPER ALLOY STEM
MaterialCOPPER ALLOY DISK
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3030-00-079-7506 INTERCHANGEABLE
Belts,v,matched Set
3110-00-100-0223377 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
5940-00-113-3142MS20659-139 INTERCHANGEABLE
Terminal,lug
Sae International Dba Sae International
3110-00-155-744105079-05185 INTERCHANGEABLE
Bearing,roller,tapered
The Timken Corporation
3030-00-529-0293 INTERCHANGEABLE
Belt,v
9650-00-529-8373 INTERCHANGEABLE
Lead Shot
2920-00-540-7539377 INTERCHANGEABLE
Spark Plug
Allied-Signal Inc Autolite Div
4920-00-669-8759B144 INTERCHANGEABLE
Cable Assembly Kit
Lockheed Martin Corp
6240-00-770-2618 INTERCHANGEABLE
Lamp,incandescent
6625-00-912-9905 INTERCHANGEABLE
Generator,signal
Cross-Reference Index
Part NumberManufacturer
377 William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA)
B144 Stockham Valves and Fittings Inc (USA)
Related Parts
3030-00-079-7506INTERCHANGEABLE
BELTS,V,MATCHED SET
3110-00-100-0223INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
377
5940-00-113-3142INTERCHANGEABLE
TERMINAL,LUG
MS20659-139
3110-00-155-7441INTERCHANGEABLE
BEARING,ROLLER,TAPERED
05079-05185
3030-00-529-0293INTERCHANGEABLE
BELT,V
9650-00-529-8373INTERCHANGEABLE
LEAD SHOT
2920-00-540-7539INTERCHANGEABLE
SPARK PLUG
377
4920-00-669-8759INTERCHANGEABLE
CABLE ASSEMBLY KIT
B144
6240-00-770-2618INTERCHANGEABLE
LAMP,INCANDESCENT
6625-00-912-9905INTERCHANGEABLE
GENERATOR,SIGNAL
3230-00-954-7969INTERCHANGEABLE
BLADE,CIRCULAR SAW,WOODCUTTING
377
5975-01-088-0291INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
377

Frequently Asked Questions

What is NSN 4820-00-956-6204?

NSN 4820-00-956-6204 is a Valve,gate, manufactured by William Powell Company, the Dba Powell Valve Div the Starflo Corporation, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-956-6204?

NSN 4820-00-956-6204 has 2 cross-referenced part numbers: 377 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation), B144 (Stockham Valves and Fittings Inc).

What NSN replaces 4820-00-956-6204?

There are 12 known substitutes for 4820-00-956-6204: 3030-00-079-7506, 3110-00-100-0223, 5940-00-113-3142 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 377?

Key specifications for 377: Connection Type: THREADED INTERNAL PIPE; Material: COPPER ALLOY BODY; Bonnet Type: INSIDE SCREW; Material Document and Classification: QQ-C-390,ALLOY D4 FED SPEC SINGLE MATERIAL RESPONSE BODY. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-956-6204 still in active supply?

NSN 4820-00-956-6204 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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