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NSN 5310-01-657-3724Government record, cited

Washer, Flat5310-01-657-3724

NSN 5310-01-657-3724 · NIIN 016573724 · Part number 4051515
Oshkosh Defense Llc · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 75Q65
Government record, cited
NSN 5310-01-657-3724 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-657-3724. Manufacturer of record part number: 4051515.
Also searched as  5310-01-657-3724 · 5310016573724 · NIIN 016573724 · 01-657-3724 · FSC 5310 Nuts and Washers · CAGE 75Q65 · 4051515
Nearby stock numbers  ·
Features
  • Washer,flat — FSC 5310
  • Overall Diameter: 2.13 INCHES NOMINAL IN
  • Cross-Sectional Shape Style: RECTANGULAR
  • Color: BLACK OVERALL
  • Surface Treatment: PHOSPHATE AND ZINC OVERALL
  • Peripheral Shape Style: ROUND
  • Material: STEEL COMP 1011 OVERALL
  • Center Hole Shape Style: ROUND
Identification
  • NSN: 5310-01-657-3724
  • NIIN: 016573724
  • FSC: 5310 — Nuts and Washers
  • FSG: 53 — Hardware and Abrasives
  • Primary part number: 4051515
  • Manufacturer: Oshkosh Defense Llc
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-657-3724, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-657-3724
Primary Part Number4051515
Item NameWasher,flat
FSC / FSG5310 / 53 — Nuts and Washers
ManufacturerOshkosh Defense Llc
StatusACTIVE
Overall Diameter2.13 INCHES NOMINAL IN
Cross-Sectional Shape StyleRECTANGULAR
ColorBLACK OVERALL
Surface TreatmentPHOSPHATE AND ZINC OVERALL
Peripheral Shape StyleROUND
MaterialSTEEL COMP 1011 OVERALL
Center Hole Shape StyleROUND
Hole Diameter0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN
Thickness0.1345 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
Cross-Reference Index
Part NumberManufacturer
4051515 PRIMARY Oshkosh Defense Llc (USA)
No interchangeability data on file.
Other items in FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040
5310-00-000-0040 · Item name not on file
5310-00-000-0077
NUT,PLAIN,ROUND
5310-00-000-0079
WASHER,FLAT
5310-00-000-0079
WASHER,FLAT
5310-00-000-1146
5310-00-000-1146 · Item name not on file
5310-00-000-3815
5310-00-000-3815 · Item name not on file
5310-00-000-4532
5310-00-000-4532 · Item name not on file
5310-00-000-4540
5310-00-000-4540 · Item name not on file

Frequently Asked Questions

What is NSN 5310-01-657-3724?

NSN 5310-01-657-3724 is a Washer,flat, manufactured by Oshkosh Defense Llc, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-657-3724?

NSN 5310-01-657-3724 has 1 manufacturer part number on file: 4051515 (Oshkosh Defense Llc).

What are the specifications of 4051515?

Key specifications for 4051515: Overall Diameter: 2.13 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Color: BLACK OVERALL; Surface Treatment: PHOSPHATE AND ZINC OVERALL. 9 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-657-3724 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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