PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40290Washer,spring Tension

Fastenal Company Dba Fastenal Co · NSN 5310-01-663-0671 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-663-0671 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-663-0671. Primary manufacturer part number: 40290.
Features
  • Washer,spring Tension — FSC 5310
  • Outside Diameter: 8.63 MILLIMETERS MINIMUM AND 9.38 MILLIMETERS MAXIMUM MM
  • Hole Diameter: 4.3 MILLIMETERS MINIMUM AND 4.6 MILLIMETERS MAXIMUM MM
  • Material Thickness: 0.45 MILLIMETERS MINIMUM AND 0.55 MILLIMETERS MAXIMUM MM
  • Surface Treatment: ZINC OVERALL
  • Style Designator: SPRING TENSION
  • Material: STEEL OVERALL
  • 2 verified cross-references
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Mechanical energy storage
  • Vibration dampening
General Description

The Washer,spring Tension, cataloged under National Stock Number 5310-01-663-0671, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Fastenal Company Dba Fastenal Co. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-663-0671
Primary Part Number40290
Item NameWasher,spring Tension
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFastenal Company Dba Fastenal Co
StatusACTIVE
Outside Diameter8.63 MILLIMETERS MINIMUM AND 9.38 MILLIMETERS MAXIMUM MM
Hole Diameter4.3 MILLIMETERS MINIMUM AND 4.6 MILLIMETERS MAXIMUM MM
Material Thickness0.45 MILLIMETERS MINIMUM AND 0.55 MILLIMETERS MAXIMUM MM
Surface TreatmentZINC OVERALL
Style DesignatorSPRING TENSION
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5360-00-095-720140290 INTERCHANGEABLE
Spring
Bunting Bearings Corp Delta Plant
3455-00-224-365545545 INTERCHANGEABLE
Cutter,milling,metal Slitting
Kennametal Inc. Div Kennametal Industrial Products Group
5961-00-372-2910 INTERCHANGEABLE
Transistor
5961-00-449-7037 INTERCHANGEABLE
Transistor
9540-00-555-0819 INTERCHANGEABLE
Beam,structural
5999-00-642-282040-290 INTERCHANGEABLE
Contact,electrical
Eaton Corp Opns & Technical Center
5915-01-031-1510GF55587 INTERCHANGEABLE
Filter,radio Frequency Interfere
Genisco Technology Corporation
1650-01-650-737440290 INTERCHANGEABLE
Cylinder Assembly,actuating,line
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Cross-Reference Index
Part NumberManufacturer
4243089 Oshkosh Defense Llc (USA)
40290 PRIMARY Fastenal Company Dba Fastenal Co (USA)
Related Parts
5360-00-095-7201INTERCHANGEABLE
SPRING
40290
3455-00-224-3655INTERCHANGEABLE
CUTTER,MILLING,METAL SLITTING
45545
5961-00-372-2910INTERCHANGEABLE
TRANSISTOR
5961-00-449-7037INTERCHANGEABLE
TRANSISTOR
9540-00-555-0819INTERCHANGEABLE
BEAM,STRUCTURAL
5999-00-642-2820INTERCHANGEABLE
CONTACT,ELECTRICAL
40-290
5915-01-031-1510INTERCHANGEABLE
FILTER,RADIO FREQUENCY INTERFERE
GF55587
1650-01-650-7374INTERCHANGEABLE
CYLINDER ASSEMBLY,ACTUATING,LINE
40290

Frequently Asked Questions

What is NSN 5310-01-663-0671?

NSN 5310-01-663-0671 is a Washer,spring Tension, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-663-0671?

NSN 5310-01-663-0671 has 2 cross-referenced part numbers: 4243089 (Oshkosh Defense Llc), 40290 (Fastenal Company Dba Fastenal Co).

What NSN replaces 5310-01-663-0671?

There are 8 known substitutes for 5310-01-663-0671: 5360-00-095-7201, 3455-00-224-3655, 5961-00-372-2910 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40290?

Key specifications for 40290: Outside Diameter: 8.63 MILLIMETERS MINIMUM AND 9.38 MILLIMETERS MAXIMUM MM; End Item Identification: 4210-01-622-0440; MRAP - M-ATV; Special Features: FINISH PER ISO 4042; Overall Height: 1.0 MILLIMETERS MINIMUM AND 2.0 MILLIMETERS MAXIMUM MM. 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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