PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet
MRO / Hardware and Abrasives / 5310-01-556-5374

33673Washer,lock

Fastenal Company Dba Fastenal Co · NSN 5310-01-556-5374 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-556-5374 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-556-5374. Primary manufacturer part number: 33673.
NUT + WASHER
5310-01-556-5374 — No Item Name Available illustration
Features
  • Washer,lock — FSC 5310
  • 5 verified cross-references
  • Primary manufacturer: Fastenal Company Dba Fastenal Co
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,lock, cataloged under National Stock Number 5310-01-556-5374, 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. This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameWasher,lock
FSC / FSG5310 — No Item Name Available (FSG 53)
ManufacturersNd Defense Llc (CAGE 338X5); Fastenal Company Dba Fastenal Co (CAGE 0Y3H3); Navistar Intl Corp Truck Br Ohio Plant (CAGE 89346)
Technical Specifications
ParameterValue
NSN5310-01-556-5374
Primary Part Number33673
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFastenal Company Dba Fastenal Co
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
⇄ Verified Substitutes 4
5330-01-223-7158N33673 INTERCHANGEABLE
Retainer,packing
Leslie Controls, Inc. Dba Leslie Controls Inc
5310-01-556-6501 INTERCHANGEABLE
Washer,flat
5310-01-589-327426070R1 INTERCHANGEABLE
Washer,lock
Nd Defense Llc
5310-01-590-932926054R1 INTERCHANGEABLE
Washer,flat
Nd Defense Llc
Cross-Reference Index
Part NumberManufacturer
25549R1 Nd Defense Llc (USA)
12759-00515 Fastenal Company Dba Fastenal Co (USA)
25549R1 Navistar Intl Corp Truck Br Ohio Plant (USA)
ESP-F-16.221-NPP Nd Defense Llc (USA)
33673 PRIMARY Fastenal Company Dba Fastenal Co (USA)
Related Parts
5330-01-223-7158INTERCHANGEABLE
RETAINER,PACKING
N33673
5310-01-556-6501INTERCHANGEABLE
WASHER,FLAT
5310-01-589-3274INTERCHANGEABLE
WASHER,LOCK
26070R1
5310-01-590-9329INTERCHANGEABLE
WASHER,FLAT
26054R1

Frequently Asked Questions

What is NSN 5310-01-556-5374?

NSN 5310-01-556-5374 is a Washer,lock, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-01-556-5374?

NSN 5310-01-556-5374 has 5 cross-referenced part numbers: 25549R1 (Nd Defense Llc), 12759-00515 (Fastenal Company Dba Fastenal Co), 25549R1 (Navistar Intl Corp Truck Br Ohio Plant), ESP-F-16.221-NPP (Nd Defense Llc), 33673 (Fastenal Company Dba Fastenal Co).

What NSN replaces 5310-01-556-5374?

There are 4 known substitutes for 5310-01-556-5374: 5330-01-223-7158, 5310-01-556-6501, 5310-01-589-3274 and 1 more. Verify interchangeability with system specifications before substitution.

Is NSN 5310-01-556-5374 still in active supply?

NSN 5310-01-556-5374 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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Home · MRO Catalog · Hardware and Abrasives · TDS Rev 1.0 · 2026-07-22