PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

42663Washer,flat

General Motors Corp Delco Products Div Machine Control Systems · NSN 5310-00-366-3749 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-366-3749 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-366-3749. Primary manufacturer part number: 42663.
Features
  • Washer,flat — FSC 5310
  • Hole Diameter: 0.191 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN
  • Center Hole Shape Style: ROUND
  • Overall Diameter: 0.438 INCHES NOMINAL IN
  • Thickness: 0.031 INCHES NOMINAL IN
  • Material: STEEL OVERALL
  • Peripheral Shape Style: ROUND
  • Cross-Sectional Shape Style: RECTANGULAR
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-366-3749, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is General Motors Corp Delco Products Div Machine Control Systems. 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-366-3749
Primary Part Number42663
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerGeneral Motors Corp Delco Products Div Machine Control Systems
StatusACTIVE
Hole Diameter0.191 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN
Center Hole Shape StyleROUND
Overall Diameter0.438 INCHES NOMINAL IN
Thickness0.031 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Peripheral Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5360-00-246-9911393044 INTERCHANGEABLE
Spring,helical,extension
Am General Llc
5962-01-088-860042663 INTERCHANGEABLE
Microcircuit,digital
Raytheon Company Div Rmd Strategic
2510-01-365-026742663 INTERCHANGEABLE
Panel,vehicular Operation
Crown Controls Corp
Cross-Reference Index
Part NumberManufacturer
42663 General Motors Corp Delco Products Div Machine Control Systems (USA)
42663 General Motors Corp (USA)
42663 General Motors Llc Dba General Motors Llc (USA)
Related Parts
5360-00-246-9911INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
393044
5962-01-088-8600INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
42663
2510-01-365-0267INTERCHANGEABLE
PANEL,VEHICULAR OPERATION
42663

Frequently Asked Questions

What is NSN 5310-00-366-3749?

NSN 5310-00-366-3749 is a Washer,flat, manufactured by General Motors Corp Delco Products Div Machine Control Systems, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-366-3749?

NSN 5310-00-366-3749 has 3 cross-referenced part numbers: 42663 (General Motors Corp Delco Products Div Machine Control Systems), 42663 (General Motors Corp), 42663 (General Motors Llc Dba General Motors Llc).

What NSN replaces 5310-00-366-3749?

There are 3 known substitutes for 5310-00-366-3749: 5360-00-246-9911, 5962-01-088-8600, 2510-01-365-0267. Verify interchangeability with system specifications before substitution.

What are the specifications of 42663?

Key specifications for 42663: Hole Diameter: 0.191 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN; Center Hole Shape Style: ROUND; Overall Diameter: 0.438 INCHES NOMINAL IN; Thickness: 0.031 INCHES NOMINAL IN. 7 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com