PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40258Washer,lock

Fastenal Company Dba Fastenal Co · NSN 5310-01-556-6815 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-556-6815 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-556-6815. Primary manufacturer part number: 40258.
Features
  • Washer,lock — FSC 5310
  • 6 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 5310-01-556-6815, 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 6 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 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)
ManufacturersFastenal Company Dba Fastenal Co (CAGE 0Y3H3); Nd Defense Llc (CAGE 338X5); Anixter (CAGE 03KT1)
Technical Specifications
ParameterValue
NSN5310-01-556-6815
Primary Part Number40258
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFastenal Company Dba Fastenal Co
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
2990-00-153-7271441594C1 INTERCHANGEABLE
Pipe,exhaust
Navistar Intl Corp Truck Br Ohio Plant
5325-00-200-7377 INTERCHANGEABLE
Ring,retaining
5961-00-577-30232N270 INTERCHANGEABLE
Transistor
New Jersey Semiconductor Products Inc Eagle Electronics Div
5950-01-028-6664SM-C-542756 INTERCHANGEABLE
Transformer,power
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5305-01-242-630340258 INTERCHANGEABLE
Screw,cap,socket Head
Naval Inventory Control Point Mechanicsburg
5325-01-267-980040258 INTERCHANGEABLE
Ring,retaining
L & R Manufacturing Company
5998-01-429-892340258 INTERCHANGEABLE
Printed Wiring Board
Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit
4320-01-465-4963 INTERCHANGEABLE
Motor,hydraulic
5310-01-513-464830264R1 INTERCHANGEABLE
Washer,lock
Nd Defense Llc
5310-01-556-6816 INTERCHANGEABLE
Washer,lock
Cross-Reference Index
Part NumberManufacturer
40258 PRIMARY Fastenal Company Dba Fastenal Co (USA)
ESP-FM-1.121-PP Nd Defense Llc (USA)
5320000157-00 Nd Defense Llc (USA)
12759-00593 Fastenal Company Dba Fastenal Co (USA)
933815R1 Nd Defense Llc (USA)
933815R1 Anixter (USA)
Related Parts
2990-00-153-7271INTERCHANGEABLE
PIPE,EXHAUST
441594C1
5325-00-200-7377INTERCHANGEABLE
RING,RETAINING
5961-00-577-3023INTERCHANGEABLE
TRANSISTOR
2N270
5950-01-028-6664INTERCHANGEABLE
TRANSFORMER,POWER
SM-C-542756
5305-01-242-6303INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
40258
5325-01-267-9800INTERCHANGEABLE
RING,RETAINING
40258
5998-01-429-8923INTERCHANGEABLE
PRINTED WIRING BOARD
40258
4320-01-465-4963INTERCHANGEABLE
MOTOR,HYDRAULIC
5310-01-513-4648INTERCHANGEABLE
WASHER,LOCK
30264R1
5310-01-556-6816INTERCHANGEABLE
WASHER,LOCK
5310-01-556-6817INTERCHANGEABLE
WASHER,LOCK
40253
5310-01-556-6818INTERCHANGEABLE
WASHER,LOCK

Frequently Asked Questions

What is NSN 5310-01-556-6815?

NSN 5310-01-556-6815 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 5310-01-556-6815?

NSN 5310-01-556-6815 has 6 cross-referenced part numbers: 40258 (Fastenal Company Dba Fastenal Co), ESP-FM-1.121-PP (Nd Defense Llc), 5320000157-00 (Nd Defense Llc), 12759-00593 (Fastenal Company Dba Fastenal Co), 933815R1 (Nd Defense Llc) and 1 more.

What NSN replaces 5310-01-556-6815?

There are 12 known substitutes for 5310-01-556-6815: 2990-00-153-7271, 5325-00-200-7377, 5961-00-577-3023 and 9 more. Verify interchangeability with system specifications before substitution.

Is NSN 5310-01-556-6815 still in active supply?

NSN 5310-01-556-6815 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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