PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

495320-1Insulator,plate

Northrop Grumman Systems Corporation Div Marine Systems · NSN 5970-01-078-4472 · FSC 5970 · No Item Name Available
Verified by PartsTable
NSN 5970-01-078-4472 — this item is cataloged by the U.S. Government under National Stock Number 5970-01-078-4472. Primary manufacturer part number: 495320-1.
Features
  • Insulator,plate — FSC 5970
  • First Side Radius: 0.525 INCHES NOMINAL IN
  • Second Hole Spacing: 0.522 INCHES NOMINAL IN
  • Material: MICA OVERALL
  • Style Designator: FLAT, DIAMOND
  • First Hole Spacing: 0.188 INCHES NOMINAL IN
  • First Hole Diameter: 0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
  • Fifth Hole Spacing: 0.205 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
Applications
  • Applications requiring Mica Overall construction
General Description

The Insulator,plate, cataloged under National Stock Number 5970-01-078-4472, 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 Northrop Grumman Systems Corporation Div Marine Systems. Government technical data includes 11 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5970-01-078-4472
Primary Part Number495320-1
Item NameInsulator,plate
FSC / FSG5970 / 59 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation Div Marine Systems
StatusACTIVE
First Side Radius0.525 INCHES NOMINAL IN
Second Hole Spacing0.522 INCHES NOMINAL IN
MaterialMICA OVERALL
Style DesignatorFLAT, DIAMOND
First Hole Spacing0.188 INCHES NOMINAL IN
First Hole Diameter0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
Fifth Hole Spacing0.205 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
Second Hole Diameter0.038 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
Third Hole Spacing1.177 INCHES MINIMUM AND 1.197 INCHES MAXIMUM IN
Fourth Hole Spacing0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
First End Radius0.188 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5970-00-144-7779 INTERCHANGEABLE
Insulator,plate
5970-00-840-5109128-006-0001 INTERCHANGEABLE
Insulator,plate
Northrop Grumman Systems Corporation
Cross-Reference Index
Part NumberManufacturer
495320-1 Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin (USA)
495320-1 PRIMARY Northrop Grumman Systems Corporation Div Marine Systems (USA)
Related Parts
5970-00-144-7779INTERCHANGEABLE
INSULATOR,PLATE
5970-00-840-5109INTERCHANGEABLE
INSULATOR,PLATE
128-006-0001

Frequently Asked Questions

What is NSN 5970-01-078-4472?

NSN 5970-01-078-4472 is a Insulator,plate, manufactured by Northrop Grumman Systems Corporation Div Marine Systems, classified under FSC 5970 (No Item Name Available). Status: active.

What are the part numbers for NSN 5970-01-078-4472?

NSN 5970-01-078-4472 has 2 cross-referenced part numbers: 495320-1 (Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin), 495320-1 (Northrop Grumman Systems Corporation Div Marine Systems).

What NSN replaces 5970-01-078-4472?

There are 2 known substitutes for 5970-01-078-4472: 5970-00-144-7779, 5970-00-840-5109. Verify interchangeability with system specifications before substitution.

What are the specifications of 495320-1?

Key specifications for 495320-1: First Side Radius: 0.525 INCHES NOMINAL IN; Second Hole Spacing: 0.522 INCHES NOMINAL IN; Material: MICA OVERALL; Style Designator: FLAT, DIAMOND. 14 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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