PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

D8-326-100-040Washer,flat

Southco Inc · NSN 5310-01-670-6264 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-670-6264 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-670-6264. Primary manufacturer part number: D8-326-100-040.
Features
  • Washer,flat — FSC 5310
  • Overall Diameter: 11.75 INCHES NOMINAL IN
  • Peripheral Shape Style: ROUND
  • Hole Diameter: 5.4 INCHES NOMINAL IN
  • Cross-Sectional Shape Style: BLANK RECTANGULAR
  • Center Hole Shape Style: ROUND
  • Thickness: 0.5 INCHES NOMINAL IN
  • Material: PLASTIC OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Plastic Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-670-6264, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Southco Inc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-670-6264
Primary Part NumberD8-326-100-040
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerSouthco Inc
StatusACTIVE
Overall Diameter11.75 INCHES NOMINAL IN
Peripheral Shape StyleROUND
Hole Diameter5.4 INCHES NOMINAL IN
Cross-Sectional Shape StyleBLANK RECTANGULAR
Center Hole Shape StyleROUND
Thickness0.5 INCHES NOMINAL IN
MaterialPLASTIC OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
1090-00-517-14915171491 INTERCHANGEABLE
Nut,union
U S Army Tank Automotive Command Amsta-Im-Mm
5961-01-102-5719 INTERCHANGEABLE
Semiconductor Device,diode
Cross-Reference Index
Part NumberManufacturer
12600579 Oshkosh Defense Llc (USA)
D8-326-100-040 PRIMARY Southco Inc (USA)
A20434 Unac (FRA)
Related Parts
1090-00-517-1491INTERCHANGEABLE
NUT,UNION
5171491
5961-01-102-5719INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE

Frequently Asked Questions

What is NSN 5310-01-670-6264?

NSN 5310-01-670-6264 is a Washer,flat, manufactured by Southco Inc, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-670-6264?

NSN 5310-01-670-6264 has 3 cross-referenced part numbers: 12600579 (Oshkosh Defense Llc), D8-326-100-040 (Southco Inc), A20434 (Unac).

What NSN replaces 5310-01-670-6264?

There are 2 known substitutes for 5310-01-670-6264: 1090-00-517-1491, 5961-01-102-5719. Verify interchangeability with system specifications before substitution.

What are the specifications of D8-326-100-040?

Key specifications for D8-326-100-040: End Item Identification: 2320-01-652-5208; Overall Diameter: 11.75 INCHES NOMINAL IN; Peripheral Shape Style: ROUND; Hole Diameter: 5.4 INCHES NOMINAL IN. 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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