PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21860Insulator,washer

Smiths Aerospace, Inc., Electronic Systems-Grand Rapids · NSN 5970-01-100-2035 · FSC 5970 · No Item Name Available
Verified by PartsTable
NSN 5970-01-100-2035 — this item is cataloged by the U.S. Government under National Stock Number 5970-01-100-2035. Primary manufacturer part number: 21860.
Features
  • Insulator,washer — FSC 5970
  • Outside Diameter: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
  • Material: MICA OVERALL
  • Style Designator: ROUND, FLAT
  • Inside Diameter: 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
  • 2 verified cross-references
  • Primary manufacturer: Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Mica Overall construction
General Description

The Insulator,washer, cataloged under National Stock Number 5970-01-100-2035, 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 Smiths Aerospace, Inc., Electronic Systems-Grand Rapids. Government technical data includes 4 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5970-01-100-2035
Primary Part Number21860
Item NameInsulator,washer
FSC / FSG5970 / 59 — No Item Name Available
ManufacturerSmiths Aerospace, Inc., Electronic Systems-Grand Rapids
StatusACTIVE
Outside Diameter0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
MaterialMICA OVERALL
Style DesignatorROUND, FLAT
Inside Diameter0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
2990-01-010-610621860 INTERCHANGEABLE
Muffler,exhaust
Walker Mfg Co
5330-01-192-577921860 INTERCHANGEABLE
Packing,preformed
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
5331-01-205-562421860 INTERCHANGEABLE
O-Ring
Tyco Fire Products Lp
4730-01-265-044721860 INTERCHANGEABLE
Manifold,hydraulic System Access
Mark Industries
Cross-Reference Index
Part NumberManufacturer
21860 Smiths Aerospace, Inc., Electronic Systems-Grand Rapids (USA)
B05608A003 Freescale Semiconductor, Inc. (USA)
Related Parts
2990-01-010-6106INTERCHANGEABLE
MUFFLER,EXHAUST
21860
5330-01-192-5779INTERCHANGEABLE
PACKING,PREFORMED
21860
5331-01-205-5624INTERCHANGEABLE
O-RING
21860
4730-01-265-0447INTERCHANGEABLE
MANIFOLD,HYDRAULIC SYSTEM ACCESS
21860

Frequently Asked Questions

What is NSN 5970-01-100-2035?

NSN 5970-01-100-2035 is a Insulator,washer, manufactured by Smiths Aerospace, Inc., Electronic Systems-Grand Rapids, classified under FSC 5970 (No Item Name Available). Status: active.

What are the part numbers for NSN 5970-01-100-2035?

NSN 5970-01-100-2035 has 2 cross-referenced part numbers: 21860 (Smiths Aerospace, Inc., Electronic Systems-Grand Rapids), B05608A003 (Freescale Semiconductor, Inc.).

What NSN replaces 5970-01-100-2035?

There are 4 known substitutes for 5970-01-100-2035: 2990-01-010-6106, 5330-01-192-5779, 5331-01-205-5624 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21860?

Key specifications for 21860: Outside Diameter: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN; Material: MICA OVERALL; Style Designator: ROUND, FLAT; Overall Height: 0.001 INCHES MINIMUM AND 0.003 INCHES MAXIMUM IN. 5 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com