PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40254Washer,lock

Fastenal Company Dba Fastenal Co · NSN 5310-01-564-3336 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-564-3336 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-564-3336. Primary manufacturer part number: 40254.
Features
  • Washer,lock — FSC 5310
  • Hole Diameter: 12.2 MILLIMETERS MINIMUM AND 12.7 MILLIMETERS MAXIMUM MM
  • Material Thickness: 2.3 MILLIMETERS MINIMUM AND 2.6 MILLIMETERS MAXIMUM MM
  • Outside Diameter: 21.1 MILLIMETERS MAXIMUM MM
  • Material: STEEL OVERALL
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • 1 verified cross-reference
  • Primary manufacturer: Fastenal Company Dba Fastenal Co
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,lock, cataloged under National Stock Number 5310-01-564-3336, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Fastenal Company Dba Fastenal Co. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-564-3336
Primary Part Number40254
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFastenal Company Dba Fastenal Co
StatusACTIVE
Hole Diameter12.2 MILLIMETERS MINIMUM AND 12.7 MILLIMETERS MAXIMUM MM
Material Thickness2.3 MILLIMETERS MINIMUM AND 2.6 MILLIMETERS MAXIMUM MM
Outside Diameter21.1 MILLIMETERS MAXIMUM MM
MaterialSTEEL OVERALL
Style DesignatorSPLIT HELICAL-RIGHT HAND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
6110-00-229-5541100936 INTERCHANGEABLE
Regulator,voltage
Linde Material Handling North America Corporation
5961-00-492-1728 INTERCHANGEABLE
Transistor
5950-00-645-7445845564 INTERCHANGEABLE
Coil,radio Frequency
Lockheed Martin Corporation Div Rms - Mitchel Field
2915-00-931-333740254 INTERCHANGEABLE
Valve Assembly,butterfly
Eaton Corporation Dba Airframe Div Fuel & Motion Control Systems
5360-01-264-565240254 INTERCHANGEABLE
Spring,inner Column
L & R Manufacturing Company
5310-01-732-958710510745 INTERCHANGEABLE
Washer,lock
Fastenal Company Dba Fastenal Co
Cross-Reference Index
Part NumberManufacturer
40254 PRIMARY Fastenal Company Dba Fastenal Co (USA)
Related Parts
6110-00-229-5541INTERCHANGEABLE
REGULATOR,VOLTAGE
100936
5961-00-492-1728INTERCHANGEABLE
TRANSISTOR
5950-00-645-7445INTERCHANGEABLE
COIL,RADIO FREQUENCY
845564
2915-00-931-3337INTERCHANGEABLE
VALVE ASSEMBLY,BUTTERFLY
40254
5360-01-264-5652INTERCHANGEABLE
SPRING,INNER COLUMN
40254
5310-01-732-9587INTERCHANGEABLE
WASHER,LOCK
10510745

Frequently Asked Questions

What is NSN 5310-01-564-3336?

NSN 5310-01-564-3336 is a Washer,lock, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-564-3336?

NSN 5310-01-564-3336 has 1 cross-referenced part number: 40254 (Fastenal Company Dba Fastenal Co).

What NSN replaces 5310-01-564-3336?

There are 6 known substitutes for 5310-01-564-3336: 6110-00-229-5541, 5961-00-492-1728, 5950-00-645-7445 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40254?

Key specifications for 40254: Hole Diameter: 12.2 MILLIMETERS MINIMUM AND 12.7 MILLIMETERS MAXIMUM MM; Special Features: M12 DIN 127 PLAIN FINISH SPLIT LOCK WASHER; Material Thickness: 2.3 MILLIMETERS MINIMUM AND 2.6 MILLIMETERS MAXIMUM MM; Outside Diameter: 21.1 MILLIMETERS MAXIMUM MM. 6 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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