PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5611-66-2Insulator,washer

Seastrom Manufacturing Co Inc · NSN 5970-01-071-0677 · FSC 5970 · No Item Name Available
Verified by PartsTable
NSN 5970-01-071-0677 — this item is cataloged by the U.S. Government under National Stock Number 5970-01-071-0677. Primary manufacturer part number: 5611-66-2.
Features
  • Insulator,washer — FSC 5970
  • Material and Location: OVERALL PLASTIC, POLYIMIDE, MIL-P-46112
  • Style Designator: ROUND, FLAT
  • Inside Diameter: 0.198 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN
  • Outside Diameter: 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
  • 4 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 5970-01-071-0677, 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 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5970-01-071-0677
Primary Part Number5611-66-2
Item NameInsulator,washer
FSC / FSG5970 / 59 — No Item Name Available
ManufacturerSeastrom Manufacturing Co Inc
StatusCANCELLED
Material and LocationOVERALL PLASTIC, POLYIMIDE, MIL-P-46112
Style DesignatorROUND, FLAT
Inside Diameter0.198 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN
Outside Diameter0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5120-00-241-3186 INTERCHANGEABLE
Socket,socket Wrench
3040-00-716-0117 INTERCHANGEABLE
Shaft
Cross-Reference Index
Part NumberManufacturer
633261-02 Bae Systems Controls Inc (USA)
SM-B-890412 Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir (USA)
40912 Eaton Corp Information Management Systems Div Microwave Components (USA)
5611-66-2 PRIMARY Seastrom Manufacturing Co Inc (USA)
Related Parts
5120-00-241-3186INTERCHANGEABLE
SOCKET,SOCKET WRENCH
3040-00-716-0117INTERCHANGEABLE
SHAFT

Frequently Asked Questions

What is NSN 5970-01-071-0677?

NSN 5970-01-071-0677 is a Insulator,washer, manufactured by Seastrom Manufacturing Co Inc, classified under FSC 5970 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5970-01-071-0677?

NSN 5970-01-071-0677 has 4 cross-referenced part numbers: 633261-02 (Bae Systems Controls Inc), SM-B-890412 (Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir), 40912 (Eaton Corp Information Management Systems Div Microwave Components), 5611-66-2 (Seastrom Manufacturing Co Inc).

What NSN replaces 5970-01-071-0677?

There are 2 known substitutes for 5970-01-071-0677: 5120-00-241-3186, 3040-00-716-0117. Verify interchangeability with system specifications before substitution.

What are the specifications of 5611-66-2?

Key specifications for 5611-66-2: Material and Location: OVERALL PLASTIC, POLYIMIDE, MIL-P-46112; Style Designator: ROUND, FLAT; Overall Height: 0.001 INCHES MINIMUM AND 0.003 INCHES MAXIMUM IN; Inside Diameter: 0.198 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN. 5 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5970-01-071-0677 still in active supply?

NSN 5970-01-071-0677 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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