PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

803-2177525-C4B1AFValve,angle

Naval Ship Systems Command · NSN 4820-01-554-1203 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-554-1203 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-554-1203. Primary manufacturer part number: 803-2177525-C4B1AF.
Features
  • Valve,angle — FSC 4820
  • Material: STEEL BODY
  • Valve Size: 0.750 INCHES IN
  • Valve Operation Method: MANUAL
  • Material Document and Classification: MIL-S-24093 MIL SPEC SINGLE MATERIAL RESPONSE BODY
  • 2 verified cross-references
  • Primary manufacturer: Naval Ship Systems Command
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Body construction
General Description

The Valve,angle, cataloged under National Stock Number 4820-01-554-1203, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Naval Ship Systems Command. Government technical data includes 4 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-01-554-1203
Primary Part Number803-2177525-C4B1AF
Item NameValve,angle
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerNaval Ship Systems Command
StatusCANCELLED
MaterialSTEEL BODY
Valve Size0.750 INCHES IN
Valve Operation MethodMANUAL
Material Document and ClassificationMIL-S-24093 MIL SPEC SINGLE MATERIAL RESPONSE BODY
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
5977-00-159-2251 INTERCHANGEABLE
Holder,electrical Contact Brush
4820-00-174-2600 INTERCHANGEABLE
Valve,angle
4820-00-491-8055 INTERCHANGEABLE
Valve,angle
4820-00-566-1281SW1971-2IN INTERCHANGEABLE
Valve,angle
Flowserve Inc
4820-01-237-2796SW-1971SS 1.00IN. INTERCHANGEABLE
Valve,angle
Flowserve Inc
4820-01-554-0912803-2177525-C1B1AF INTERCHANGEABLE
Valve,angle
Naval Ship Systems Command
Cross-Reference Index
Part NumberManufacturer
5530W Ashcroft Inc Dba Heise (USA)
803-2177525-C4B1AF PRIMARY Naval Ship Systems Command (USA)
Related Parts
5977-00-159-2251INTERCHANGEABLE
HOLDER,ELECTRICAL CONTACT BRUSH
4820-00-174-2600INTERCHANGEABLE
VALVE,ANGLE
4820-00-491-8055INTERCHANGEABLE
VALVE,ANGLE
4820-00-566-1281INTERCHANGEABLE
VALVE,ANGLE
SW1971-2IN
4820-01-237-2796INTERCHANGEABLE
VALVE,ANGLE
SW-1971SS 1.00IN.
4820-01-554-0912INTERCHANGEABLE
VALVE,ANGLE
803-2177525-C1B1AF

Frequently Asked Questions

What is NSN 4820-01-554-1203?

NSN 4820-01-554-1203 is a Valve,angle, manufactured by Naval Ship Systems Command, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-01-554-1203?

NSN 4820-01-554-1203 has 2 cross-referenced part numbers: 5530W (Ashcroft Inc Dba Heise), 803-2177525-C4B1AF (Naval Ship Systems Command).

What NSN replaces 4820-01-554-1203?

There are 6 known substitutes for 4820-01-554-1203: 5977-00-159-2251, 4820-00-174-2600, 4820-00-491-8055 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 803-2177525-C4B1AF?

Key specifications for 803-2177525-C4B1AF: Material: STEEL BODY; Part Name Assigned by Controlling Agency: ANGLE STOP WITH BACKSEAT; Valve Size: 0.750 INCHES IN; Valve Operation Method: MANUAL. 5 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-01-554-1203 still in active supply?

NSN 4820-01-554-1203 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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