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NSN 5310-01-490-2543Government record, cited
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Washer, Lock5310-01-490-2543

NSN 5310-01-490-2543 · NIIN 014902543 · Part number 566-6985432-8
Naval Sea Systems Command · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 53711
Government record, cited
NSN 5310-01-490-2543 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-490-2543. Manufacturer of record part number: 566-6985432-8.
Also searched as  5310-01-490-2543 · 5310014902543 · NIIN 014902543 · 01-490-2543 · FSC 5310 Nuts and Washers · CAGE 53711 · 566-6985432-8 · 211028399 · 566-6985431-8 · H623-0505-8 · 6985432
Nearby stock numbers  ·
AF 3.410 INCHES NOMINAL IN NUT + WASHER
5310-01-490-2543 — Nuts and Washers
Features
  • Washer,lock — FSC 5310
  • Surface Finish: 250.0 MICROINCHES ALL SURFACES
  • Style Designator: FLAT EXTERNAL TEETH
  • Material Document and Classification: QQ-N-281,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Outside Diameter: 8.250 INCHES NOMINAL IN
  • Material Thickness: 0.125 INCHES NOMINAL IN
  • Material: NICKEL ALLOY 400 OVERALL
  • Hole Diameter: 3.410 INCHES NOMINAL IN
Identification
  • NSN: 5310-01-490-2543
  • NIIN: 014902543
  • FSC: 5310 — Nuts and Washers
  • FSG: 53 — Hardware and Abrasives
  • Primary part number: 566-6985432-8
  • Manufacturer: Naval Sea Systems Command
General Description

The Washer,lock, cataloged under National Stock Number 5310-01-490-2543, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-490-2543
Primary Part Number566-6985432-8
Item NameWasher,lock
FSC / FSG5310 / 53 — Nuts and Washers
ManufacturerNaval Sea Systems Command
StatusACTIVE
Surface Finish250.0 MICROINCHES ALL SURFACES
Style DesignatorFLAT EXTERNAL TEETH
Material Document and ClassificationQQ-N-281,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Outside Diameter8.250 INCHES NOMINAL IN
Material Thickness0.125 INCHES NOMINAL IN
MaterialNICKEL ALLOY 400 OVERALL
Hole Diameter3.410 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3040-01-492-7554566-6985432-41 POSSIBLE MATCH
CONNECTING LINK,RIGID
Possible match (shared part number)Naval Sea Systems Command
3040-01-492-7555566-6985432-A3 POSSIBLE MATCH
CONNECTING LINK,RIGID
Possible match (shared part number)Naval Sea Systems Command
4730-01-492-7588566-6985431-33 POSSIBLE MATCH
COUPLING,TUBE
Possible match (shared part number)Naval Sea Systems Command
4820-01-493-6395566-6985432-48 POSSIBLE MATCH
FLANGE,GLAND,VALVE
Possible match (shared part number)Naval Sea Systems Command
3120-01-500-6206566-6985432-49 POSSIBLE MATCH
BEARING,SLEEVE
Possible match (shared part number)Rexnord Industries, Llc Div Aerosspace Bearing Operation
3110-01-660-2205566-6985432-7 POSSIBLE MATCH
RETAINER,STAVE CROS
Possible match (shared part number)Naval Sea Systems Command
3120-01-720-1022GBZUE1383-TXMM POSSIBLE MATCH
BEARING,SLEEVE
Possible match (shared part number)Trelleborg Sealing Solutions Us, Inc.
3120-01-722-2007GBZUE1395-TXMM POSSIBLE MATCH
BEARING,SLEEVE
Possible match (shared part number)Trelleborg Sealing Solutions Us, Inc.
Cross-Reference Index
Part NumberManufacturer
566-6985432-8 PRIMARY Naval Sea Systems Command (USA)
566-6985431-8 Naval Sea Systems Command (USA)
Reference documents
ReferenceMeaning
211028399 5/2 Secondary reference
U.S. Government activity
H623-0505-8 5/2 Secondary reference
U.S. Government activity
6985432 D/9 Drawing number reference only
Naval Sea Systems Command
H623-0503-8 5/2 Secondary reference
U.S. Government activity
Related Parts
3040-01-492-7554POSSIBLE MATCH
CONNECTING LINK,RIGID
566-6985432-41
3040-01-492-7555POSSIBLE MATCH
CONNECTING LINK,RIGID
566-6985432-A3
4730-01-492-7588POSSIBLE MATCH
COUPLING,TUBE
566-6985431-33
4820-01-493-6395POSSIBLE MATCH
FLANGE,GLAND,VALVE
566-6985432-48
3120-01-500-6206POSSIBLE MATCH
BEARING,SLEEVE
566-6985432-49
3110-01-660-2205POSSIBLE MATCH
RETAINER,STAVE CROS
566-6985432-7
3120-01-720-1022POSSIBLE MATCH
BEARING,SLEEVE
GBZUE1383-TXMM
3120-01-722-2007POSSIBLE MATCH
BEARING,SLEEVE
GBZUE1395-TXMM

Frequently Asked Questions

What is NSN 5310-01-490-2543?

NSN 5310-01-490-2543 is a Washer,lock, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-490-2543?

NSN 5310-01-490-2543 has 2 manufacturer part numbers on file: 566-6985432-8 (Naval Sea Systems Command), 566-6985431-8 (Naval Sea Systems Command).

What NSN replaces 5310-01-490-2543?

8 possible matches (shared part number, not a government interchangeability claim): 3040-01-492-7554, 3040-01-492-7555, 4730-01-492-7588. Verify interchangeability with system specifications before substitution.

What are the specifications of 566-6985432-8?

Key specifications for 566-6985432-8: Surface Finish: 250.0 MICROINCHES ALL SURFACES; Style Designator: FLAT EXTERNAL TEETH; Material Document and Classification: QQ-N-281,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 8.250 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-490-2543 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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