PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21577Plunger,relief Valve

Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. · NSN 2810-00-118-7385 · FSC 2810 · No Item Name Available
Verified by PartsTable
NSN 2810-00-118-7385 — this item is cataloged by the U.S. Government under National Stock Number 2810-00-118-7385. Primary manufacturer part number: 21577.
Features
  • Plunger,relief Valve — FSC 2810
  • General Characteristics Item Description: MATL STEEL PER AMS 6322; HARDNESS PER ROCKWELL C38 MIN AND C43 MAX; 0.71875 IN. LONG; 0.746 IN. OD; 1 HOLE 0.5 IN. DIA BY 0.5625 IN. DEEP IN
  • 3 verified cross-references
  • Primary manufacturer: Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Plunger,relief Valve, cataloged under National Stock Number 2810-00-118-7385, is classified within Federal Supply Class 2810 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2810-00-118-7385
Primary Part Number21577
Item NamePlunger,relief Valve
FSC / FSG2810 / 28 — No Item Name Available
ManufacturerPratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
StatusACTIVE
General Characteristics Item DescriptionMATL STEEL PER AMS 6322; HARDNESS PER ROCKWELL C38 MIN AND C43 MAX; 0.71875 IN. LONG; 0.746 IN. OD; 1 HOLE 0.5 IN. DIA BY 0.5625 IN. DEEP IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
4730-01-140-94662157-7 INTERCHANGEABLE
Cap,quick Disconnect
Transdigm Inc Div Adelwiggins Group
5950-01-185-1997 INTERCHANGEABLE
Transformer
5330-01-256-062121577 INTERCHANGEABLE
Gasket
Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.
5330-01-327-700421577 INTERCHANGEABLE
Packing,preformed
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
Cross-Reference Index
Part NumberManufacturer
AS21577 Aircraft Supplies (USA)
21577 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
21577 PRIMARY Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN)
Related Parts
4730-01-140-9466INTERCHANGEABLE
CAP,QUICK DISCONNECT
2157-7
5950-01-185-1997INTERCHANGEABLE
TRANSFORMER
5330-01-256-0621INTERCHANGEABLE
GASKET
21577
5330-01-327-7004INTERCHANGEABLE
PACKING,PREFORMED
21577

Frequently Asked Questions

What is NSN 2810-00-118-7385?

NSN 2810-00-118-7385 is a Plunger,relief Valve, manufactured by Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp., classified under FSC 2810 (No Item Name Available). Status: active.

What are the part numbers for NSN 2810-00-118-7385?

NSN 2810-00-118-7385 has 3 cross-referenced part numbers: AS21577 (Aircraft Supplies), 21577 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 21577 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.).

What NSN replaces 2810-00-118-7385?

There are 4 known substitutes for 2810-00-118-7385: 4730-01-140-9466, 5950-01-185-1997, 5330-01-256-0621 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21577?

Key specifications for 21577: General Characteristics Item Description: MATL STEEL PER AMS 6322; HARDNESS PER ROCKWELL C38 MIN AND C43 MAX; 0.71875 IN. LONG; 0.746 IN. OD; 1 HOLE 0.5 IN. DIA BY 0.5625 IN. DEEP IN; End Item Identification: ACFT ENG R1830. 2 total characteristics are documented in the Federal Logistics Information System.

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