PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1229N4590Washer,flat

Nd Defense Llc · NSN 5310-01-566-6442 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-566-6442 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-566-6442. Primary manufacturer part number: 1229N4590.
Features
  • Washer,flat — FSC 5310
  • 1 verified cross-reference
  • Primary manufacturer: Nd Defense Llc
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-566-6442, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Nd Defense Llc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-566-6442
Primary Part Number1229N4590
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNd Defense Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5310-01-445-94891229-N-4590 INTERCHANGEABLE
Washer,flat
Meritor Heavy Vehicle Systems, Llc
Cross-Reference Index
Part NumberManufacturer
1229N4590 PRIMARY Nd Defense Llc (USA)
Related Parts
5310-01-445-9489INTERCHANGEABLE
WASHER,FLAT
1229-N-4590

Frequently Asked Questions

What is NSN 5310-01-566-6442?

NSN 5310-01-566-6442 is a Washer,flat, manufactured by Nd Defense Llc, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-566-6442?

NSN 5310-01-566-6442 has 1 cross-referenced part number: 1229N4590 (Nd Defense Llc).

What NSN replaces 5310-01-566-6442?

There is 1 known substitute for 5310-01-566-6442: 5310-01-445-9489. Verify interchangeability with system specifications before substitution.

What are the specifications of 1229N4590?

Key specifications for 1229N4590: Part Name Assigned by Controlling Agency: WASHER,FLAT .110" THICKNESS; End Item Identification: MRAP - UNIQUE NSN - USED ON 2 MRAP VARIANTS. 2 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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