PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-I-38526/1Insulator,washer

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5970-00-569-9589 · FSC 5970 · No Item Name Available
Verified by PartsTable
NSN 5970-00-569-9589 — this item is cataloged by the U.S. Government under National Stock Number 5970-00-569-9589. Primary manufacturer part number: MIL-I-38526/1.
Features
  • Insulator,washer — FSC 5970
  • Style Designator: ROUND, FLAT
  • Inside Diameter: 0.203 INCHES NOMINAL IN
  • Outside Diameter: 0.562 INCHES NOMINAL IN
  • Specification/standard Data: 81349-MIL-I-38526/1 /USAF/ GOVERNMENT SPECIFICATION
  • Material and Location: OVERALL PLASTIC, POLYIMIDE, MIL-P-46112, TYPE 1
  • 2 verified cross-references
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Insulator,washer, cataloged under National Stock Number 5970-00-569-9589, 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 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5970-00-569-9589
Primary Part NumberMIL-I-38526/1
Item NameInsulator,washer
FSC / FSG5970 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Style DesignatorROUND, FLAT
Inside Diameter0.203 INCHES NOMINAL IN
Outside Diameter0.562 INCHES NOMINAL IN
Specification/standard Data81349-MIL-I-38526/1 /USAF/ GOVERNMENT SPECIFICATION
Material and LocationOVERALL PLASTIC, POLYIMIDE, MIL-P-46112, TYPE 1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5970-00-133-4840 INTERCHANGEABLE
Insulator,washer
5999-00-264-4970 INTERCHANGEABLE
Mounting Pad,electrical-Electron
5970-00-442-0862 INTERCHANGEABLE
Insulator,plate
5999-01-008-5296 INTERCHANGEABLE
Mounting Pad,electrical-Electron
5970-01-043-9966 INTERCHANGEABLE
Insulator,plate
5970-01-048-9171 INTERCHANGEABLE
Insulator,plate
5970-01-050-4204 INTERCHANGEABLE
Insulator,plate
5970-01-057-6696 INTERCHANGEABLE
Insulator,plate
5970-01-249-7868 INTERCHANGEABLE
Insulator,plate
Cross-Reference Index
Part NumberManufacturer
MIL-I-38526/1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M38526/1-104 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5970-00-133-4840INTERCHANGEABLE
INSULATOR,WASHER
5999-00-264-4970INTERCHANGEABLE
MOUNTING PAD,ELECTRICAL-ELECTRON
5970-00-442-0862INTERCHANGEABLE
INSULATOR,PLATE
5999-01-008-5296INTERCHANGEABLE
MOUNTING PAD,ELECTRICAL-ELECTRON
5970-01-043-9966INTERCHANGEABLE
INSULATOR,PLATE
5970-01-048-9171INTERCHANGEABLE
INSULATOR,PLATE
5970-01-050-4204INTERCHANGEABLE
INSULATOR,PLATE
5970-01-057-6696INTERCHANGEABLE
INSULATOR,PLATE
5970-01-249-7868INTERCHANGEABLE
INSULATOR,PLATE

Frequently Asked Questions

What is NSN 5970-00-569-9589?

NSN 5970-00-569-9589 is a Insulator,washer, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5970 (No Item Name Available). Status: active.

What are the part numbers for NSN 5970-00-569-9589?

NSN 5970-00-569-9589 has 2 cross-referenced part numbers: MIL-I-38526/1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M38526/1-104 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5970-00-569-9589?

There are 9 known substitutes for 5970-00-569-9589: 5970-00-133-4840, 5999-00-264-4970, 5970-00-442-0862 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-I-38526/1?

Key specifications for MIL-I-38526/1: Style Designator: ROUND, FLAT; Inside Diameter: 0.203 INCHES NOMINAL IN; Overall Height: 0.005 INCHES NOMINAL IN; Outside Diameter: 0.562 INCHES NOMINAL IN. 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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