PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20522Washer,flat

Teledyne Industries Inc Teledyne Power Systems Div · NSN 5310-00-350-7377 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-350-7377 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-350-7377. Primary manufacturer part number: 20522.
Features
  • Washer,flat — FSC 5310
  • Overall Diameter: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
  • Hole Diameter: 0.256 INCHES MINIMUM AND 0.276 INCHES MAXIMUM IN
  • Material: STEEL OVERALL
  • Peripheral Shape Style: ROUND
  • Cross-Sectional Shape Style: RECTANGULAR
  • Thickness: 0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
  • Surface Treatment: PHOSPHATE OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-350-7377, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Teledyne Industries Inc Teledyne Power Systems Div. Government technical data includes 8 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-350-7377
Primary Part Number20522
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerTeledyne Industries Inc Teledyne Power Systems Div
StatusACTIVE
Overall Diameter0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
Hole Diameter0.256 INCHES MINIMUM AND 0.276 INCHES MAXIMUM IN
MaterialSTEEL OVERALL
Peripheral Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
Thickness0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
Surface TreatmentPHOSPHATE OVERALL
Center Hole Shape StyleROUND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
4720-00-224-999720522 INTERCHANGEABLE
Hose,preformed
Gates Corporation
5940-00-849-4662463 INTERCHANGEABLE
Terminal,lug
Zierick Mfg Corp
5945-00-883-6839696211-2 INTERCHANGEABLE
Relay,solid State
Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix
5845-00-886-6301 INTERCHANGEABLE
Keyplate Assembly
4730-00-997-6159 INTERCHANGEABLE
Tee,pipe
5365-01-080-3005 INTERCHANGEABLE
Spacer,ring
5310-01-647-8564 INTERCHANGEABLE
Washer,flat
Cross-Reference Index
Part NumberManufacturer
20522 Teledyne Industries Inc Teledyne Power Systems Div (USA)
Related Parts
4720-00-224-9997INTERCHANGEABLE
HOSE,PREFORMED
20522
5940-00-849-4662INTERCHANGEABLE
TERMINAL,LUG
463
5945-00-883-6839INTERCHANGEABLE
RELAY,SOLID STATE
696211-2
5845-00-886-6301INTERCHANGEABLE
KEYPLATE ASSEMBLY
4730-00-997-6159INTERCHANGEABLE
TEE,PIPE
5365-01-080-3005INTERCHANGEABLE
SPACER,RING
5310-01-647-8564INTERCHANGEABLE
WASHER,FLAT

Frequently Asked Questions

What is NSN 5310-00-350-7377?

NSN 5310-00-350-7377 is a Washer,flat, manufactured by Teledyne Industries Inc Teledyne Power Systems Div, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-350-7377?

NSN 5310-00-350-7377 has 1 cross-referenced part number: 20522 (Teledyne Industries Inc Teledyne Power Systems Div).

What NSN replaces 5310-00-350-7377?

There are 7 known substitutes for 5310-00-350-7377: 4720-00-224-9997, 5940-00-849-4662, 5945-00-883-6839 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20522?

Key specifications for 20522: Overall Diameter: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN; Hole Diameter: 0.256 INCHES MINIMUM AND 0.276 INCHES MAXIMUM IN; Material: STEEL OVERALL; Peripheral Shape Style: ROUND. 8 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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