PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

110S20Washer,key

Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St) · NSN 5310-00-209-2594 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-209-2594 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-209-2594. Primary manufacturer part number: 110S20.
Features
  • Washer,key — FSC 5310
  • Material Thickness: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
  • Style Designator: KEY
  • Hole Diameter: 3.010 INCHES MINIMUM AND 3.015 INCHES MAXIMUM IN
  • Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Internal Key Quantity: 1
  • Outside Diameter: 3.615 INCHES MINIMUM AND 3.635 INCHES MAXIMUM IN
  • Hardness Rating: 55.0 ROCKWELL B MINIMUM AND 70.0 ROCKWELL B MAXIMUM
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1020 Overall construction
General Description

The Washer,key, cataloged under National Stock Number 5310-00-209-2594, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St). Government technical data includes 11 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-209-2594
Primary Part Number110S20
Item NameWasher,key
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerHoneywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St)
StatusCANCELLED
Material Thickness0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
Style DesignatorKEY
Hole Diameter3.010 INCHES MINIMUM AND 3.015 INCHES MAXIMUM IN
Material Document and ClassificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Internal Key Quantity1
Outside Diameter3.615 INCHES MINIMUM AND 3.635 INCHES MAXIMUM IN
Hardness Rating55.0 ROCKWELL B MINIMUM AND 70.0 ROCKWELL B MAXIMUM
MaterialSTEEL COMP 1020 OVERALL
Distance From Centerline to Top of Internal Key1.376 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN
Internal Straight Key Width0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
Surface TreatmentCADMIUM OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5330-00-019-0632C6908 INTERCHANGEABLE
Packing,preformed
Hydro Line Mfg Co
5999-00-078-144850701-000 INTERCHANGEABLE
Contact Assembly,electrical
Rees, Inc
5935-00-105-76631005202-3 INTERCHANGEABLE
Guide,electrical Connector
Armel De Llc Dba Armel Electronics
5340-00-205-5266 INTERCHANGEABLE
Button,plug
6160-00-643-04043168059PCAA INTERCHANGEABLE
Jar,battery
Naval Ship Systems Command
4820-00-772-25015102-1 INTERCHANGEABLE
Valve,pressure Equalizing,gaseou
Aar Allen Services, Inc Dba Aar Component Services Wellington
4820-00-892-212751021 INTERCHANGEABLE
Valve,angle
Velan Valve Corp.
5315-00-918-705451021 INTERCHANGEABLE
Pin,quick Release
Avibank Mfg., Inc. Dba Avibank Manufacturing Inc
5330-01-024-456251021 INTERCHANGEABLE
Seal Assembly
Shaw Development, Llc
7510-01-047-023036-12153-01 INTERCHANGEABLE
Ribbon,inking
Compaq Federal Llc
Cross-Reference Index
Part NumberManufacturer
110S20 PRIMARY Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St) (USA)
51021 Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St) (USA)
Related Parts
5330-00-019-0632INTERCHANGEABLE
PACKING,PREFORMED
C6908
5999-00-078-1448INTERCHANGEABLE
CONTACT ASSEMBLY,ELECTRICAL
50701-000
5935-00-105-7663INTERCHANGEABLE
GUIDE,ELECTRICAL CONNECTOR
1005202-3
5340-00-205-5266INTERCHANGEABLE
BUTTON,PLUG
6160-00-643-0404INTERCHANGEABLE
JAR,BATTERY
3168059PCAA
4820-00-772-2501INTERCHANGEABLE
VALVE,PRESSURE EQUALIZING,GASEOU
5102-1
4820-00-892-2127INTERCHANGEABLE
VALVE,ANGLE
51021
5315-00-918-7054INTERCHANGEABLE
PIN,QUICK RELEASE
51021
5330-01-024-4562INTERCHANGEABLE
SEAL ASSEMBLY
51021
7510-01-047-0230INTERCHANGEABLE
RIBBON,INKING
36-12153-01
7045-01-086-2044INTERCHANGEABLE
TAPE,ELECTRONIC DATA PROCESSING
9150-01-193-1443INTERCHANGEABLE
LUBRICANT,SOLID FILM
51021

Frequently Asked Questions

What is NSN 5310-00-209-2594?

NSN 5310-00-209-2594 is a Washer,key, manufactured by Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St), classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-209-2594?

NSN 5310-00-209-2594 has 2 cross-referenced part numbers: 110S20 (Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St)), 51021 (Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St)).

What NSN replaces 5310-00-209-2594?

There are 12 known substitutes for 5310-00-209-2594: 5330-00-019-0632, 5999-00-078-1448, 5935-00-105-7663 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 110S20?

Key specifications for 110S20: Material Thickness: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN; Style Designator: KEY; Hole Diameter: 3.010 INCHES MINIMUM AND 3.015 INCHES MAXIMUM IN; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-209-2594 still in active supply?

NSN 5310-00-209-2594 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com