PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66X-3331Washer,lock

Ametek Inc Div Ametek Switch · NSN 5310-01-250-7844 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-250-7844 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-250-7844. Primary manufacturer part number: 66X-3331.
Features
  • Washer,lock — FSC 5310
  • 4 verified cross-references
  • Primary manufacturer: Ametek Inc Div Ametek Switch
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,lock, cataloged under National Stock Number 5310-01-250-7844, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Ametek Inc Div Ametek Switch. This item has 4 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.

Catalog Facts
Item NameWasher,lock
FSC / FSG5310 — No Item Name Available (FSG 53)
ManufacturersAmetek Inc Div Ametek Switch (CAGE 1R7H6); Prestolite Electric Inc (CAGE 68505); Jednolity Indeks Materialowy - Uniform Material Index (CAGE 9009H); Prestolite Electric Inc (CAGE 24975)
Technical Specifications
ParameterValue
NSN5310-01-250-7844
Primary Part Number66X-3331
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerAmetek Inc Div Ametek Switch
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
3110-00-100-3551 INTERCHANGEABLE
Cone and Rollers,tapered Roller
5950-00-768-7340X333-1 INTERCHANGEABLE
Coil,radio Frequency
Communication Coil, Inc. Div -
Cross-Reference Index
Part NumberManufacturer
66X-3331 PRIMARY Ametek Inc Div Ametek Switch (USA)
X-3331 Prestolite Electric Inc (USA)
5310PL0717576 Jednolity Indeks Materialowy - Uniform Material Index (POL)
66X-3331 Prestolite Electric Inc (USA)
Related Parts
3110-00-100-3551INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
5950-00-768-7340INTERCHANGEABLE
COIL,RADIO FREQUENCY
X333-1

Frequently Asked Questions

What is NSN 5310-01-250-7844?

NSN 5310-01-250-7844 is a Washer,lock, manufactured by Ametek Inc Div Ametek Switch, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-250-7844?

NSN 5310-01-250-7844 has 4 cross-referenced part numbers: 66X-3331 (Ametek Inc Div Ametek Switch), X-3331 (Prestolite Electric Inc), 5310PL0717576 (Jednolity Indeks Materialowy - Uniform Material Index), 66X-3331 (Prestolite Electric Inc).

What NSN replaces 5310-01-250-7844?

There are 2 known substitutes for 5310-01-250-7844: 3110-00-100-3551, 5950-00-768-7340. Verify interchangeability with system specifications before substitution.

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