PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40173Shielding Gasket,electronic

Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit · NSN 5999-01-371-5552 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-371-5552 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-371-5552. Primary manufacturer part number: 40173.
Features
  • Shielding Gasket,electronic — FSC 5999
  • Gage Ring Thickness: 0.045 INCHES NOMINAL IN
  • Aperture Diameter: 1.307 INCHES MINIMUM AND 1.322 INCHES MAXIMUM IN
  • Environmental Protection Material Location: THROUGHOUT RF SHIELDING GASKET
  • Surface Treatment Document and Classification: UNABLE TO DECODE
  • Style Designator: NON-CIRCULAR
  • Bolt Hole Quantity: 4
  • Hole Diameter: 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The Shielding Gasket,electronic, cataloged under National Stock Number 5999-01-371-5552, 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 Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit. Government technical data includes 20 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: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-01-371-5552
Primary Part Number40173
Item NameShielding Gasket,electronic
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerTransistor Devices Inc Div Astrodyne Tdi High Power Business Unit
StatusACTIVE
Gage Ring Thickness0.045 INCHES NOMINAL IN
Aperture Diameter1.307 INCHES MINIMUM AND 1.322 INCHES MAXIMUM IN
Environmental Protection Material LocationTHROUGHOUT RF SHIELDING GASKET
Surface Treatment Document and ClassificationUNABLE TO DECODE
Style DesignatorNON-CIRCULAR
Bolt Hole Quantity4
Hole Diameter0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
Cross-Sectional Thickness0.045 INCHES NOMINAL IN
Cross-Sectional Shape StyleMETAL AND RUBBER
Surface TreatmentUNABLE TO DECODE
Gage Ring Thickness0.045 INCHES NOMINAL IN
Aperture Diameter1.307 INCHES MINIMUM AND 1.322 INCHES MAXIMUM IN
Environmental Protection Material LocationTHROUGHOUT RF SHIELDING GASKET
Surface Treatment Document and ClassificationUNABLE TO DECODE
Style DesignatorNON-CIRCULAR
Bolt Hole Quantity4
Hole Diameter0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
Cross-Sectional Thickness0.045 INCHES NOMINAL IN
Cross-Sectional Shape StyleMETAL AND RUBBER
Surface TreatmentUNABLE TO DECODE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code9
Criticality CodeN
Unit of IssueEA
SMR CodeJN
Verified Substitutes 6
5340-00-528-450540158 INTERCHANGEABLE
Spring
Trw Inc Trw Commercial Steering Div
5330-00-842-8275648697 INTERCHANGEABLE
Gasket
Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division
5950-01-135-12805347545 INTERCHANGEABLE
Transformer,power
Naval Sea Systems Command
4820-01-232-2487679812 INTERCHANGEABLE
Valve,safety Relief
Facet (oklahoma) Llc
4140-01-435-2590 INTERCHANGEABLE
Fan,centrifugal
4820-01-682-529540173-811 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Cross-Reference Index
Part NumberManufacturer
ESSCG-B-14-0 Spira Manufacturing Corporation Dba Spira Manufacturing Corp (USA)
40173 PRIMARY Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit (USA)
Related Parts
5340-00-528-4505INTERCHANGEABLE
SPRING
40158
5330-00-842-8275INTERCHANGEABLE
GASKET
648697
5950-01-135-1280INTERCHANGEABLE
TRANSFORMER,POWER
5347545
4820-01-232-2487INTERCHANGEABLE
VALVE,SAFETY RELIEF
679812
4140-01-435-2590INTERCHANGEABLE
FAN,CENTRIFUGAL
4820-01-682-5295INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40173-811

Frequently Asked Questions

What is NSN 5999-01-371-5552?

NSN 5999-01-371-5552 is a Shielding Gasket,electronic, manufactured by Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-01-371-5552?

NSN 5999-01-371-5552 has 2 cross-referenced part numbers: ESSCG-B-14-0 (Spira Manufacturing Corporation Dba Spira Manufacturing Corp), 40173 (Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit).

What NSN replaces 5999-01-371-5552?

There are 6 known substitutes for 5999-01-371-5552: 5340-00-528-4505, 5330-00-842-8275, 5950-01-135-1280 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40173?

Key specifications for 40173: Gage Ring Thickness: 0.045 INCHES NOMINAL IN; Aperture Diameter: 1.307 INCHES MINIMUM AND 1.322 INCHES MAXIMUM IN; Environmental Protection Material Location: THROUGHOUT RF SHIELDING GASKET; Surface Treatment Document and Classification: UNABLE TO DECODE. 24 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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