PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8331803Washer,lock

U S Army Tank Automotive Command Amsta-Im-Mm · NSN 5310-00-281-3370 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-281-3370 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-281-3370. Primary manufacturer part number: 8331803.
Features
  • Washer,lock — FSC 5310
  • Outside Diameter: 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
  • Material Thickness: 0.035 INCHES NOMINAL IN
  • Hole Diameter: 0.381 INCHES MINIMUM AND 0.401 INCHES MAXIMUM IN
  • Style Designator: FLAT EXTERNAL TEETH
  • Material: STEEL OVERALL
  • 2 verified cross-references
  • Primary manufacturer: U S Army Tank Automotive Command Amsta-Im-Mm
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-281-3370, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-281-3370
Primary Part Number8331803
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerU S Army Tank Automotive Command Amsta-Im-Mm
StatusACTIVE
Outside Diameter0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
Material Thickness0.035 INCHES NOMINAL IN
Hole Diameter0.381 INCHES MINIMUM AND 0.401 INCHES MAXIMUM IN
Style DesignatorFLAT EXTERNAL TEETH
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5940-00-115-2676MS20659-143 INTERCHANGEABLE
Terminal,lug
Sae International Dba Sae International
5977-00-268-2585PC46722-1 INTERCHANGEABLE
Holder Assembly,electrical Conta
Honeywell International, Inc Div Aerospace-Tucson
8135-00-281-4113 INTERCHANGEABLE
Fiberboard,corrugated
6940-00-516-8592 INTERCHANGEABLE
Marker,training Set
3020-00-611-5440102931-1 INTERCHANGEABLE
Sprocket Wheel
Metadure Parts & Sales, Inc.
5950-00-806-90664113 INTERCHANGEABLE
Transformer,power
Agilent Technologies, Inc. Div Agilent Technologies Headquarters
5355-00-966-77984113 INTERCHANGEABLE
Knob
Wakmann Watch Company Inc
6150-01-123-51351828 INTERCHANGEABLE
Bus,conductor
Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron
5310-01-261-66844113 INTERCHANGEABLE
Nut,plain,hexagon
Arrow Safety Device Co
5940-01-342-48754-113 INTERCHANGEABLE
Terminal,lug
Raytheon Company Dba Raytheon Co
Cross-Reference Index
Part NumberManufacturer
8331803 PRIMARY U S Army Tank Automotive Command Amsta-Im-Mm (USA)
4113 Wico-Prestolite Co the Div of Eltra Corp (USA)
Related Parts
5940-00-115-2676INTERCHANGEABLE
TERMINAL,LUG
MS20659-143
5977-00-268-2585INTERCHANGEABLE
HOLDER ASSEMBLY,ELECTRICAL CONTA
PC46722-1
8135-00-281-4113INTERCHANGEABLE
FIBERBOARD,CORRUGATED
6940-00-516-8592INTERCHANGEABLE
MARKER,TRAINING SET
3020-00-611-5440INTERCHANGEABLE
SPROCKET WHEEL
102931-1
5950-00-806-9066INTERCHANGEABLE
TRANSFORMER,POWER
4113
5355-00-966-7798INTERCHANGEABLE
KNOB
4113
6150-01-123-5135INTERCHANGEABLE
BUS,CONDUCTOR
1828
5310-01-261-6684INTERCHANGEABLE
NUT,PLAIN,HEXAGON
4113
5940-01-342-4875INTERCHANGEABLE
TERMINAL,LUG
4-113
4810-01-386-4190INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
4113
6530-01-554-7895INTERCHANGEABLE
SOCKET,ACCESSORY CLAMP
A-40022

Frequently Asked Questions

What is NSN 5310-00-281-3370?

NSN 5310-00-281-3370 is a Washer,lock, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-281-3370?

NSN 5310-00-281-3370 has 2 cross-referenced part numbers: 8331803 (U S Army Tank Automotive Command Amsta-Im-Mm), 4113 (Wico-Prestolite Co the Div of Eltra Corp).

What NSN replaces 5310-00-281-3370?

There are 12 known substitutes for 5310-00-281-3370: 5940-00-115-2676, 5977-00-268-2585, 8135-00-281-4113 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8331803?

Key specifications for 8331803: Outside Diameter: 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN; Material Thickness: 0.035 INCHES NOMINAL IN; Hole Diameter: 0.381 INCHES MINIMUM AND 0.401 INCHES MAXIMUM IN; Style Designator: FLAT EXTERNAL TEETH. 5 total characteristics are documented in the Federal Logistics Information System.

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