PartsTable TECHNICAL DATA SHEET
Download PDF
NSN 5310-01-666-5951Government record, cited
Home › MRO › Hardware and Abrasives › 5310-01-666-5951

Washer, Lock5310-01-666-5951

NSN 5310-01-666-5951 · NIIN 016665951 · Part number 09003A0843-3
Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 01365
Government record, cited
NSN 5310-01-666-5951 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-666-5951. Manufacturer of record part number: 09003A0843-3.
Also searched as  5310-01-666-5951 · 5310016665951 · NIIN 016665951 · 01-666-5951 · FSC 5310 Nuts and Washers · CAGE 01365 · 09003A0843-3 · ML6400000ZY0000
Nearby stock numbers  ·
AF 10.2 MILLIMETERS MINIMUM AND 10.7 MILLIMETERS MAXIMUM MM NUT + WASHER
5310-01-666-5951 — Nuts and Washers
Features
  • Washer,lock — FSC 5310
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Outside Diameter: 18.1 MILLIMETERS MAXIMUM MM
  • Material Thickness: 2.05 MILLIMETERS MINIMUM AND 2.35 MILLIMETERS MAXIMUM MM
  • Color: YELLOW OVERALL
  • Surface Treatment: ZINC OVERALL
  • Material: STEEL OVERALL
  • Hole Diameter: 10.2 MILLIMETERS MINIMUM AND 10.7 MILLIMETERS MAXIMUM MM
Identification
  • NSN: 5310-01-666-5951
  • NIIN: 016665951
  • FSC: 5310 — Nuts and Washers
  • FSG: 53 — Hardware and Abrasives
  • Primary part number: 09003A0843-3
  • Manufacturer: Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service
General Description

The Washer,lock, cataloged under National Stock Number 5310-01-666-5951, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service. 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. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-666-5951
Primary Part Number09003A0843-3
Item NameWasher,lock
FSC / FSG5310 / 53 — Nuts and Washers
ManufacturerMarine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service
StatusACTIVE
Style DesignatorSPLIT HELICAL-RIGHT HAND
Outside Diameter18.1 MILLIMETERS MAXIMUM MM
Material Thickness2.05 MILLIMETERS MINIMUM AND 2.35 MILLIMETERS MAXIMUM MM
ColorYELLOW OVERALL
Surface TreatmentZINC OVERALL
MaterialSTEEL OVERALL
Hole Diameter10.2 MILLIMETERS MINIMUM AND 10.7 MILLIMETERS MAXIMUM MM
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
Cross-Reference Index
Part NumberManufacturer
09003A0843-3 PRIMARY Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service (USA)
ML6400000ZY0000 Fastenal Company Dba Fastenal Co (USA)
No interchangeability data on file.
Other items in FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040
5310-00-000-0040 · Item name not on file
5310-00-000-0077
NUT,PLAIN,ROUND
5310-00-000-0079
WASHER,FLAT
5310-00-000-0079
WASHER,FLAT
5310-00-000-1146
5310-00-000-1146 · Item name not on file
5310-00-000-3815
5310-00-000-3815 · Item name not on file
5310-00-000-4532
5310-00-000-4532 · Item name not on file
5310-00-000-4540
5310-00-000-4540 · Item name not on file

Frequently Asked Questions

What is NSN 5310-01-666-5951?

NSN 5310-01-666-5951 is a Washer,lock, manufactured by Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-666-5951?

NSN 5310-01-666-5951 has 2 manufacturer part numbers on file: 09003A0843-3 (Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service), ML6400000ZY0000 (Fastenal Company Dba Fastenal Co).

What are the specifications of 09003A0843-3?

Key specifications for 09003A0843-3: Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 18.1 MILLIMETERS MAXIMUM MM; Material Thickness: 2.05 MILLIMETERS MINIMUM AND 2.35 MILLIMETERS MAXIMUM MM; Color: YELLOW OVERALL. 7 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-666-5951 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.

PartsTable — the parts reference. Every fact cited to its source.
partstable.com/parts/5310-01-666-5951
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
PartsTable Design LLC · partstable.com
partstable.com · © 2026 PartsTable. Data for reference only.
Home · MRO Catalog · Hardware and Abrasives