PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

88-20564-15Washer,flat

Department of Defense Project Manager-Mobile Electric Power · NSN 5310-01-477-1264 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-477-1264 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-477-1264. Primary manufacturer part number: 88-20564-15.
Features
  • Washer,flat — FSC 5310
  • Cross-Sectional Shape Style: RECTANGULAR
  • Thickness: 0.064 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
  • Material Document and Classification: ASTM B36,UNS C26000-H02 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Material: COPPER ALLOY 260 OVERALL
  • Overall Diameter: 1.243 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN
  • Hole Diameter: 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
  • Peripheral Shape Style: ROUND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy 260 Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-477-1264, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Department of Defense Project Manager-Mobile Electric Power. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-477-1264
Primary Part Number88-20564-15
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerDepartment of Defense Project Manager-Mobile Electric Power
StatusACTIVE
Cross-Sectional Shape StyleRECTANGULAR
Thickness0.064 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
Material Document and ClassificationASTM B36,UNS C26000-H02 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MaterialCOPPER ALLOY 260 OVERALL
Overall Diameter1.243 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN
Hole Diameter0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
Peripheral Shape StyleROUND
Center Hole Shape StyleROUND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5310-00-044-6477 INTERCHANGEABLE
Washer,flat
5310-00-809-4058 INTERCHANGEABLE
Washer,flat
5310-01-234-9415 INTERCHANGEABLE
Washer,flat
5310-01-234-9416 INTERCHANGEABLE
Washer,flat
5310-01-242-2679 INTERCHANGEABLE
Washer,flat
5310-01-266-4641 INTERCHANGEABLE
Washer,flat
5310-01-267-1685 INTERCHANGEABLE
Washer,flat
5310-01-396-5840 INTERCHANGEABLE
Washer,flat
5310-01-466-4926 INTERCHANGEABLE
Washer,flat
Cross-Reference Index
Part NumberManufacturer
88-20564-15 PRIMARY Department of Defense Project Manager-Mobile Electric Power (USA)
88-20564 Department of Defense Project Manager-Mobile Electric Power (USA)
Related Parts
5310-00-044-6477INTERCHANGEABLE
WASHER,FLAT
5310-00-809-4058INTERCHANGEABLE
WASHER,FLAT
5310-01-234-9415INTERCHANGEABLE
WASHER,FLAT
5310-01-234-9416INTERCHANGEABLE
WASHER,FLAT
5310-01-242-2679INTERCHANGEABLE
WASHER,FLAT
5310-01-266-4641INTERCHANGEABLE
WASHER,FLAT
5310-01-267-1685INTERCHANGEABLE
WASHER,FLAT
5310-01-396-5840INTERCHANGEABLE
WASHER,FLAT
5310-01-466-4926INTERCHANGEABLE
WASHER,FLAT

Frequently Asked Questions

What is NSN 5310-01-477-1264?

NSN 5310-01-477-1264 is a Washer,flat, manufactured by Department of Defense Project Manager-Mobile Electric Power, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-477-1264?

NSN 5310-01-477-1264 has 2 cross-referenced part numbers: 88-20564-15 (Department of Defense Project Manager-Mobile Electric Power), 88-20564 (Department of Defense Project Manager-Mobile Electric Power).

What NSN replaces 5310-01-477-1264?

There are 9 known substitutes for 5310-01-477-1264: 5310-00-044-6477, 5310-00-809-4058, 5310-01-234-9415 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 88-20564-15?

Key specifications for 88-20564-15: Cross-Sectional Shape Style: RECTANGULAR; End Item Identification: 6115-01-462-0290;GENERATOR SET,DIESEL ENGINE:30 DW TQG GENERATOR FAMILY; Thickness: 0.064 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN; Material Document and Classification: ASTM B36,UNS C26000-H02 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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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