PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

270261Shielding Gasket,electronic

Parker-Hannifin Corporation Dba Pneutronics Div Chomerics Division · NSN 5999-01-420-3453 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-420-3453 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-420-3453. Primary manufacturer part number: 270261.
Features
  • Shielding Gasket,electronic — FSC 5999
  • Aperture Length: 7.296 INCHES MINIMUM AND 7.358 INCHES MAXIMUM IN
  • Material Document and Classification: UNABLE TO DECODE
  • Environmental Protection Material Location: THROUGHOUT RF SHIELDING GASKET
  • Outside Corner Radius: 1.466 INCHES NOMINAL IN
  • Precious Material: SILVER
  • Material: UNABLE TO DECODE
  • Precious Material and Location: EMI/RFI CONDUCTIVE PARTICLES SILVER
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Unable to Decode construction
General Description

The Shielding Gasket,electronic, cataloged under National Stock Number 5999-01-420-3453, is classified within Federal Supply Class 5999 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Chomerics Division. Government technical data includes 26 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-01-420-3453
Primary Part Number270261
Item NameShielding Gasket,electronic
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerParker-Hannifin Corporation Dba Pneutronics Div Chomerics Division
StatusACTIVE
Aperture Length7.296 INCHES MINIMUM AND 7.358 INCHES MAXIMUM IN
Material Document and ClassificationUNABLE TO DECODE
Environmental Protection Material LocationTHROUGHOUT RF SHIELDING GASKET
Outside Corner Radius1.466 INCHES NOMINAL IN
Precious MaterialSILVER
MaterialUNABLE TO DECODE
Precious Material and LocationEMI/RFI CONDUCTIVE PARTICLES SILVER
Cross-Sectional Shape StyleEMI
Style DesignatorNON-CIRCULAR
Material Document and ClassificationUNABLE TO DECODE
Inside Corner Radius1.250 INCHES NOMINAL IN
Cross-Sectional Height0.216 INCHES NOMINAL IN
Aperture Width4.296 INCHES MINIMUM AND 4.358 INCHES MAXIMUM IN
Aperture Length7.296 INCHES MINIMUM AND 7.358 INCHES MAXIMUM IN
Material Document and ClassificationUNABLE TO DECODE
Environmental Protection Material LocationTHROUGHOUT RF SHIELDING GASKET
Outside Corner Radius1.466 INCHES NOMINAL IN
Precious MaterialSILVER
MaterialUNABLE TO DECODE
Precious Material and LocationEMI/RFI CONDUCTIVE PARTICLES SILVER
Cross-Sectional Shape StyleEMI
Style DesignatorNON-CIRCULAR
Material Document and ClassificationUNABLE TO DECODE
Inside Corner Radius1.250 INCHES NOMINAL IN
Cross-Sectional Height0.216 INCHES NOMINAL IN
Aperture Width4.296 INCHES MINIMUM AND 4.358 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Verified Substitutes 1
2520-01-207-358827026-1 INTERCHANGEABLE
Shroud,airflow Oil Cooler Fan
Ge Aviation Systems Llc Dba Ge Aviation Systems Llc
Cross-Reference Index
Part NumberManufacturer
270261 Parker-Hannifin Corporation Dba Pneutronics Div Chomerics Division (USA)
270261 Litton Systems Inc. Div Navigation Systems Division (USA)
Related Parts
2520-01-207-3588INTERCHANGEABLE
SHROUD,AIRFLOW OIL COOLER FAN
27026-1

Frequently Asked Questions

What is NSN 5999-01-420-3453?

NSN 5999-01-420-3453 is a Shielding Gasket,electronic, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Chomerics Division, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-01-420-3453?

NSN 5999-01-420-3453 has 2 cross-referenced part numbers: 270261 (Parker-Hannifin Corporation Dba Pneutronics Div Chomerics Division), 270261 (Litton Systems Inc. Div Navigation Systems Division).

What NSN replaces 5999-01-420-3453?

There is 1 known substitute for 5999-01-420-3453: 2520-01-207-3588. Verify interchangeability with system specifications before substitution.

What are the specifications of 270261?

Key specifications for 270261: Aperture Length: 7.296 INCHES MINIMUM AND 7.358 INCHES MAXIMUM IN; Material Document and Classification: UNABLE TO DECODE; Environmental Protection Material Location: THROUGHOUT RF SHIELDING GASKET; Outside Corner Radius: 1.466 INCHES NOMINAL IN. 30 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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