PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

104121Washer,flat

Hydro-Aire Aerospace Corp · NSN 5310-00-438-7434 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-438-7434 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-438-7434. Primary manufacturer part number: 104121.
Features
  • Washer,flat — FSC 5310
  • Thickness: 0.025 INCHES NOMINAL IN
  • Cross-Sectional Shape Style: RECTANGULAR
  • Surface Treatment: PASSIVATE OVERALL
  • Center Hole Shape Style: ROUND
  • Material: STEEL COMP 302 OVERALL
  • Hole Diameter: 0.268 INCHES MINIMUM AND 0.272 INCHES MAXIMUM IN
  • Peripheral Shape Style: ROUND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 302 Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-438-7434, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Hydro-Aire Aerospace Corp. Government technical data includes 9 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-438-7434
Primary Part Number104121
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerHydro-Aire Aerospace Corp
StatusACTIVE
Thickness0.025 INCHES NOMINAL IN
Cross-Sectional Shape StyleRECTANGULAR
Surface TreatmentPASSIVATE OVERALL
Center Hole Shape StyleROUND
MaterialSTEEL COMP 302 OVERALL
Hole Diameter0.268 INCHES MINIMUM AND 0.272 INCHES MAXIMUM IN
Peripheral Shape StyleROUND
Material Document and ClassificationMIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Overall Diameter0.716 INCHES MINIMUM AND 0.720 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
2925-00-328-2073 INTERCHANGEABLE
Shield,spark Plug
3120-00-661-748491611907 INTERCHANGEABLE
Bearing,plain,rod End
Fairbanks Morse, Llc
5305-00-688-6994 INTERCHANGEABLE
Screw,cap,socket Head
5995-01-279-3015104121 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Aimtron Systems, Llc
6130-01-295-39021041-21 INTERCHANGEABLE
Power Supply
Rotron Incorporated
2520-01-563-133810-4-121 INTERCHANGEABLE
Yoke,universal Joint,vehicular
Dana Commercial Vehicle Manufacturing, Llc Dba Dana Commercial Vehicle Products
Cross-Reference Index
Part NumberManufacturer
104121 PRIMARY Hydro-Aire Aerospace Corp (USA)
Related Parts
2925-00-328-2073INTERCHANGEABLE
SHIELD,SPARK PLUG
3120-00-661-7484INTERCHANGEABLE
BEARING,PLAIN,ROD END
91611907
5305-00-688-6994INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5995-01-279-3015INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
104121
6130-01-295-3902INTERCHANGEABLE
POWER SUPPLY
1041-21
2520-01-563-1338INTERCHANGEABLE
YOKE,UNIVERSAL JOINT,VEHICULAR
10-4-121

Frequently Asked Questions

What is NSN 5310-00-438-7434?

NSN 5310-00-438-7434 is a Washer,flat, manufactured by Hydro-Aire Aerospace Corp, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-438-7434?

NSN 5310-00-438-7434 has 1 cross-referenced part number: 104121 (Hydro-Aire Aerospace Corp).

What NSN replaces 5310-00-438-7434?

There are 6 known substitutes for 5310-00-438-7434: 2925-00-328-2073, 3120-00-661-7484, 5305-00-688-6994 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 104121?

Key specifications for 104121: Thickness: 0.025 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: PASSIVATE OVERALL; Center Hole Shape Style: ROUND. 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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