PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1578Washer,flat

H20 Tank Inc U S Motors Div · NSN 5310-00-209-1844 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-209-1844 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-209-1844. Primary manufacturer part number: 1578.
Features
  • Washer,flat — FSC 5310
  • Thickness: 0.125 INCHES NOMINAL IN
  • Overall Diameter: 2.250 INCHES NOMINAL IN
  • Material: COPPER OVERALL
  • Peripheral Shape Style: ROUND
  • Center Hole Shape Style: ROUND
  • Cross-Sectional Shape Style: RECTANGULAR
  • Hole Diameter: 1.312 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-209-1844, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is H20 Tank Inc U S Motors Div. Government technical data includes 7 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-209-1844
Primary Part Number1578
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerH20 Tank Inc U S Motors Div
StatusACTIVE
Thickness0.125 INCHES NOMINAL IN
Overall Diameter2.250 INCHES NOMINAL IN
MaterialCOPPER OVERALL
Peripheral Shape StyleROUND
Center Hole Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
Hole Diameter1.312 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5305-00-152-05501578 INTERCHANGEABLE
Screw,machine
Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division
6240-00-155-8687 INTERCHANGEABLE
Lamp,incandescent
2810-00-448-66661578 INTERCHANGEABLE
Spacer
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
5910-00-667-644947A317 INTERCHANGEABLE
Capacitor,fixed,ceramic Dielectr
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
6240-00-841-82301578 INTERCHANGEABLE
Lamp,fluorescent
Duro-Test Lighting
4330-01-022-857151578 INTERCHANGEABLE
Filter Element,fluid
Wix Corp
5305-01-083-8740 INTERCHANGEABLE
Screw,shoulder
5930-01-145-6079 INTERCHANGEABLE
Switch,rotary
5305-01-147-50891578-001 INTERCHANGEABLE
Screw
Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division
5895-01-165-3086 INTERCHANGEABLE
Mixer Stage,frequency
Cross-Reference Index
Part NumberManufacturer
1578 PRIMARY H20 Tank Inc U S Motors Div (USA)
Related Parts
5305-00-152-0550INTERCHANGEABLE
SCREW,MACHINE
1578
6240-00-155-8687INTERCHANGEABLE
LAMP,INCANDESCENT
2810-00-448-6666INTERCHANGEABLE
SPACER
1578
5910-00-667-6449INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR
47A317
6240-00-841-8230INTERCHANGEABLE
LAMP,FLUORESCENT
1578
4330-01-022-8571INTERCHANGEABLE
FILTER ELEMENT,FLUID
51578
5305-01-083-8740INTERCHANGEABLE
SCREW,SHOULDER
5930-01-145-6079INTERCHANGEABLE
SWITCH,ROTARY
5305-01-147-5089INTERCHANGEABLE
SCREW
1578-001
5895-01-165-3086INTERCHANGEABLE
MIXER STAGE,FREQUENCY
5330-01-204-0118INTERCHANGEABLE
GASKET
1730-01-206-1706INTERCHANGEABLE
PARTS KIT,JACK
1578

Frequently Asked Questions

What is NSN 5310-00-209-1844?

NSN 5310-00-209-1844 is a Washer,flat, manufactured by H20 Tank Inc U S Motors Div, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-209-1844?

NSN 5310-00-209-1844 has 1 cross-referenced part number: 1578 (H20 Tank Inc U S Motors Div).

What NSN replaces 5310-00-209-1844?

There are 12 known substitutes for 5310-00-209-1844: 5305-00-152-0550, 6240-00-155-8687, 2810-00-448-6666 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1578?

Key specifications for 1578: Thickness: 0.125 INCHES NOMINAL IN; Overall Diameter: 2.250 INCHES NOMINAL IN; Material: COPPER OVERALL; Peripheral Shape Style: ROUND. 7 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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