PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

540-3023-003Washer,flat

Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems · NSN 5310-00-685-8240 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-685-8240 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-685-8240. Primary manufacturer part number: 540-3023-003.
Features
  • Washer,flat — FSC 5310
  • Material: STEEL COMP 302 OVERALL
  • Material Document and Classification: QQ-S-766,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Surface Treatment: PASSIVATE OVERALL
  • Surface Treatment Document and Classification: QQ-P-35,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Cross-Sectional Shape Style: RECTANGULAR
  • Peripheral Shape Style: ROUND
  • Overall Diameter: 0.260 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 302 Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-685-8240, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems. Government technical data includes 10 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-685-8240
Primary Part Number540-3023-003
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerRockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
StatusCANCELLED
MaterialSTEEL COMP 302 OVERALL
Material Document and ClassificationQQ-S-766,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Surface TreatmentPASSIVATE OVERALL
Surface Treatment Document and ClassificationQQ-P-35,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Cross-Sectional Shape StyleRECTANGULAR
Peripheral Shape StyleROUND
Overall Diameter0.260 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
Hole Diameter0.139 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN
Center Hole Shape StyleROUND
Thickness0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
5133-00-988-5657 INTERCHANGEABLE
Drill,twist
Cross-Reference Index
Part NumberManufacturer
333238 Honeywell International Inc Div Aerospace-South Bend (bendix Dr) (USA)
540-3023-003 PRIMARY Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
Related Parts
5133-00-988-5657INTERCHANGEABLE
DRILL,TWIST

Frequently Asked Questions

What is NSN 5310-00-685-8240?

NSN 5310-00-685-8240 is a Washer,flat, manufactured by Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-685-8240?

NSN 5310-00-685-8240 has 2 cross-referenced part numbers: 333238 (Honeywell International Inc Div Aerospace-South Bend (bendix Dr)), 540-3023-003 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems).

What NSN replaces 5310-00-685-8240?

There is 1 known substitute for 5310-00-685-8240: 5133-00-988-5657. Verify interchangeability with system specifications before substitution.

What are the specifications of 540-3023-003?

Key specifications for 540-3023-003: Material: STEEL COMP 302 OVERALL; Material Document and Classification: QQ-S-766,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Surface Treatment: PASSIVATE OVERALL; Surface Treatment Document and Classification: QQ-P-35,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-685-8240 still in active supply?

NSN 5310-00-685-8240 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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