PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21577Packing,preformed

Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems · NSN 5330-01-327-7004 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-01-327-7004 — this item is cataloged by the U.S. Government under National Stock Number 5330-01-327-7004. Primary manufacturer part number: 21577.
Features
  • Packing,preformed — FSC 5330
  • Color: BLUE
  • Material: RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM OVERALL
  • Hardness Rating: 65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL
  • Cross-Sectional Shape Style: O-RING
  • Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
  • Center Hole Diameter: 0.790 INCHES MINIMUM AND 0.802 INCHES MAXIMUM IN
  • 1 verified cross-reference
Applications
  • Applications requiring Rubber Polymethylene-Perfluoroalkylene Class Fkm Overall construction
General Description

The Packing,preformed, cataloged under National Stock Number 5330-01-327-7004, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN5330-01-327-7004
Primary Part Number21577
Item NamePacking,preformed
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerStanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
StatusACTIVE
ColorBLUE
MaterialRUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM OVERALL
Hardness Rating65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL
Cross-Sectional Shape StyleO-RING
Cross-Sectional Height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
Center Hole Diameter0.790 INCHES MINIMUM AND 0.802 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
2810-00-118-738521577 INTERCHANGEABLE
Plunger,relief Valve
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
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.
Cross-Reference Index
Part NumberManufacturer
21577 PRIMARY Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems (USA)
Related Parts
2810-00-118-7385INTERCHANGEABLE
PLUNGER,RELIEF VALVE
21577
4730-01-140-9466INTERCHANGEABLE
CAP,QUICK DISCONNECT
2157-7
5950-01-185-1997INTERCHANGEABLE
TRANSFORMER
5330-01-256-0621INTERCHANGEABLE
GASKET
21577

Frequently Asked Questions

What is NSN 5330-01-327-7004?

NSN 5330-01-327-7004 is a Packing,preformed, manufactured by Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems, classified under FSC 5330 (No Item Name Available). Status: active.

What are the part numbers for NSN 5330-01-327-7004?

NSN 5330-01-327-7004 has 1 cross-referenced part number: 21577 (Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems).

What NSN replaces 5330-01-327-7004?

There are 4 known substitutes for 5330-01-327-7004: 2810-00-118-7385, 4730-01-140-9466, 5950-01-185-1997 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21577?

Key specifications for 21577: Color: BLUE; Material: RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM OVERALL; Hardness Rating: 65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL; Cross-Sectional Shape Style: O-RING. 6 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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