PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5611-79-5Insulator,washer

Seastrom Manufacturing Co Inc · NSN 5970-00-376-0540 · FSC 5970 · No Item Name Available
Verified by PartsTable
NSN 5970-00-376-0540 — this item is cataloged by the U.S. Government under National Stock Number 5970-00-376-0540. Primary manufacturer part number: 5611-79-5.
Features
  • Insulator,washer — FSC 5970
  • Inside Diameter: 0.255 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN
  • Material and Location: OVERALL PLASTIC, THERMA-FILM, THERMALLOY CO
  • Style Designator: ROUND, FLAT
  • Outside Diameter: 0.797 INCHES MINIMUM AND 0.827 INCHES MAXIMUM IN
  • 13 verified cross-references
  • Primary manufacturer: Seastrom Manufacturing Co Inc
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Insulator,washer, cataloged under National Stock Number 5970-00-376-0540, is classified within Federal Supply Class 5970 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Seastrom Manufacturing Co Inc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 13 commercial cross-references from 11 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5970-00-376-0540
Primary Part Number5611-79-5
Item NameInsulator,washer
FSC / FSG5970 / 59 — No Item Name Available
ManufacturerSeastrom Manufacturing Co Inc
StatusACTIVE
Inside Diameter0.255 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN
Material and LocationOVERALL PLASTIC, THERMA-FILM, THERMALLOY CO
Style DesignatorROUND, FLAT
Outside Diameter0.797 INCHES MINIMUM AND 0.827 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5970-00-133-3786 INTERCHANGEABLE
Insulator,washer
Cross-Reference Index
Part NumberManufacturer
5611-79-5 PRIMARY Seastrom Manufacturing Co Inc (USA)
43-02-25-5MIL Accessories for Electronics Inc Dba Afe (USA)
A421-6 Seastrom Manufacturing Co Inc (USA)
43-02-25-5MIL Thermalloy Co Inc (USA)
SM-C-772066-1 Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir (USA)
M38527/8-80P Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M38527/08-080P Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
G57PA002-5MIL The Boeing Company Div Defense (USA)
5970PL1346254 Jednolity Indeks Materialowy - Uniform Material Index (POL)
43-02-25-5MIL IV-Electronic Klaus Vespermann Kg (DEU)
PFFW92-004-02 Us Army Aviation and Missile Command (USA)
G57PA002-5MIL Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co (USA)
988345-7 Raytheon Company Dba Raytheon (USA)
Related Parts
5970-00-133-3786INTERCHANGEABLE
INSULATOR,WASHER

Frequently Asked Questions

What is NSN 5970-00-376-0540?

NSN 5970-00-376-0540 is a Insulator,washer, manufactured by Seastrom Manufacturing Co Inc, classified under FSC 5970 (No Item Name Available). Status: active.

What are the part numbers for NSN 5970-00-376-0540?

NSN 5970-00-376-0540 has 13 cross-referenced part numbers: 5611-79-5 (Seastrom Manufacturing Co Inc), 43-02-25-5MIL (Accessories for Electronics Inc Dba Afe), A421-6 (Seastrom Manufacturing Co Inc), 43-02-25-5MIL (Thermalloy Co Inc), SM-C-772066-1 (Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir) and 8 more.

What NSN replaces 5970-00-376-0540?

There is 1 known substitute for 5970-00-376-0540: 5970-00-133-3786. Verify interchangeability with system specifications before substitution.

What are the specifications of 5611-79-5?

Key specifications for 5611-79-5: Inside Diameter: 0.255 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN; Overall Height: 0.005 INCHES NOMINAL IN; Material and Location: OVERALL PLASTIC, THERMA-FILM, THERMALLOY CO; Style Designator: ROUND, FLAT. 5 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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