PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

345894PC203Washer,lock

Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier · NSN 5310-00-262-3558 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-262-3558 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-262-3558. Primary manufacturer part number: 345894PC203.
Features
  • Washer,lock — FSC 5310
  • Nondefinitive Spec/std Data: C CLASS
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Departure From Cited Designator: AS MODIFIED BY DIM.
  • Material Thickness: 0.031 INCHES NOMINAL IN
  • Hole Diameter: 0.141 INCHES MINIMUM AND 0.151 INCHES MAXIMUM IN
  • Outside Diameter: 0.299 INCHES NOMINAL IN
  • Material Document and Classification: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-262-3558, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-262-3558
Primary Part Number345894PC203
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNavair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
StatusACTIVE
Nondefinitive Spec/std DataC CLASS
Style DesignatorSPLIT HELICAL-RIGHT HAND
Departure From Cited DesignatorAS MODIFIED BY DIM.
Material Thickness0.031 INCHES NOMINAL IN
Hole Diameter0.141 INCHES MINIMUM AND 0.151 INCHES MAXIMUM IN
Outside Diameter0.299 INCHES NOMINAL IN
Material Document and ClassificationFED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
Hardness Rating35.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
MaterialSTEEL CORROSION RESISTING OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5310-00-209-1601T7613232PT32 INTERCHANGEABLE
Washer,lock
Westinghouse Electric Corp
5310-00-262-3491158255PC56 INTERCHANGEABLE
Washer,lock
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5310-00-262-3559 INTERCHANGEABLE
Washer,lock
5310-00-262-356212Z3019-9 INTERCHANGEABLE
Washer,lock
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5310-00-262-3563 INTERCHANGEABLE
Washer,lock
5310-00-262-3564 INTERCHANGEABLE
Washer,lock
5310-00-262-3570 INTERCHANGEABLE
Washer,lock
5310-00-595-7143 INTERCHANGEABLE
Washer,lock
Cross-Reference Index
Part NumberManufacturer
345894PC203 PRIMARY Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
158255PC46 PRIMARY Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
FFW84CLASSC Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5310-00-209-1601INTERCHANGEABLE
WASHER,LOCK
T7613232PT32
5310-00-262-3491INTERCHANGEABLE
WASHER,LOCK
158255PC56
5310-00-262-3559INTERCHANGEABLE
WASHER,LOCK
5310-00-262-3562INTERCHANGEABLE
WASHER,LOCK
12Z3019-9
5310-00-262-3563INTERCHANGEABLE
WASHER,LOCK
5310-00-262-3564INTERCHANGEABLE
WASHER,LOCK
5310-00-262-3570INTERCHANGEABLE
WASHER,LOCK
5310-00-595-7143INTERCHANGEABLE
WASHER,LOCK

Frequently Asked Questions

What is NSN 5310-00-262-3558?

NSN 5310-00-262-3558 is a Washer,lock, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-262-3558?

NSN 5310-00-262-3558 has 3 cross-referenced part numbers: 345894PC203 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 158255PC46 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), FFW84CLASSC (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5310-00-262-3558?

There are 8 known substitutes for 5310-00-262-3558: 5310-00-209-1601, 5310-00-262-3491, 5310-00-262-3559 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 345894PC203?

Key specifications for 345894PC203: Nondefinitive Spec/std Data: C CLASS; Style Designator: SPLIT HELICAL-RIGHT HAND; Departure From Cited Designator: AS MODIFIED BY DIM.; Material Thickness: 0.031 INCHES NOMINAL IN. 9 total characteristics are documented in the Federal Logistics Information System.

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