PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20405Washer,key

Parker-Hannifin Corporation Dba Control Systems Division · NSN 5310-00-550-2751 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-550-2751 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-550-2751. Primary manufacturer part number: 20405.
Features
  • Washer,key — FSC 5310
  • Material Document and Classification: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Overall Distance Including Keys: 1.235 INCHES MINIMUM AND 1.255 INCHES MAXIMUM IN
  • Style Designator: KEY
  • Material: STEEL COMP 302 OVERALL
  • Surface Treatment: PASSIVATE OVERALL
  • Hole Diameter: 0.875 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN
  • Material Thickness: 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 302 Overall construction
General Description

The Washer,key, cataloged under National Stock Number 5310-00-550-2751, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Parker-Hannifin Corporation Dba Control Systems Division. Government technical data includes 10 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-550-2751
Primary Part Number20405
Item NameWasher,key
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerParker-Hannifin Corporation Dba Control Systems Division
StatusACTIVE
Material Document and ClassificationAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Overall Distance Including Keys1.235 INCHES MINIMUM AND 1.255 INCHES MAXIMUM IN
Style DesignatorKEY
MaterialSTEEL COMP 302 OVERALL
Surface TreatmentPASSIVATE OVERALL
Hole Diameter0.875 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN
Material Thickness0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
External Key Quantity1
External Straight Key Width0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
Outside Diameter1.160 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
3110-00-156-67907405C1TX9 INTERCHANGEABLE
Bearing,ball,annular
Nsk Corp Bearing Div
3120-00-375-2877 INTERCHANGEABLE
Bushing Pump Shaft
5310-00-595-761620405 INTERCHANGEABLE
Washer,keyway
Safran Power Usa Llc
3130-00-838-5260SAF22513 INTERCHANGEABLE
Bearing Unit,roller
Skf Usa Inc.
5962-01-034-5184SNJ55121J INTERCHANGEABLE
Microcircuit,digital
Texas Instruments Incorporated
5975-01-055-51615040 INTERCHANGEABLE
Coupling,electrical Conduit
Abb Installation Products Inc
3020-01-182-18004012217-C INTERCHANGEABLE
Gear,spur
Funk Mfg Co Sub of Deere and Co
4130-01-286-7336 INTERCHANGEABLE
Head,condenser
5975-01-309-827820405 INTERCHANGEABLE
Chassis,electrical-Electronic Eq
Science Applications International Corporation
6240-01-344-9531F5TT27K INTERCHANGEABLE
Lamp,fluorescent
Gte Products Corp Sylvania Miniature Lighting Div
Cross-Reference Index
Part NumberManufacturer
20405 PRIMARY Parker-Hannifin Corporation Dba Control Systems Division (USA)
Related Parts
3110-00-156-6790INTERCHANGEABLE
BEARING,BALL,ANNULAR
7405C1TX9
3120-00-375-2877INTERCHANGEABLE
BUSHING PUMP SHAFT
5310-00-595-7616INTERCHANGEABLE
WASHER,KEYWAY
20405
3130-00-838-5260INTERCHANGEABLE
BEARING UNIT,ROLLER
SAF22513
5962-01-034-5184INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
SNJ55121J
5975-01-055-5161INTERCHANGEABLE
COUPLING,ELECTRICAL CONDUIT
5040
3020-01-182-1800INTERCHANGEABLE
GEAR,SPUR
4012217-C
4130-01-286-7336INTERCHANGEABLE
HEAD,CONDENSER
5975-01-309-8278INTERCHANGEABLE
CHASSIS,ELECTRICAL-ELECTRONIC EQ
20405
6240-01-344-9531INTERCHANGEABLE
LAMP,FLUORESCENT
F5TT27K
4210-01-675-4887INTERCHANGEABLE
FOAM LIQUID,FIRE EXTINGUISHING
446894

Frequently Asked Questions

What is NSN 5310-00-550-2751?

NSN 5310-00-550-2751 is a Washer,key, manufactured by Parker-Hannifin Corporation Dba Control Systems Division, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-550-2751?

NSN 5310-00-550-2751 has 1 cross-referenced part number: 20405 (Parker-Hannifin Corporation Dba Control Systems Division).

What NSN replaces 5310-00-550-2751?

There are 11 known substitutes for 5310-00-550-2751: 3110-00-156-6790, 3120-00-375-2877, 5310-00-595-7616 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20405?

Key specifications for 20405: Material Document and Classification: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Overall Distance Including Keys: 1.235 INCHES MINIMUM AND 1.255 INCHES MAXIMUM IN; Style Designator: KEY; Material: STEEL COMP 302 OVERALL. 10 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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