PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

940-8Washer,flat

Department of the Air Force · NSN 5310-00-187-2366 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-187-2366 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-187-2366. Primary manufacturer part number: 940-8.
Features
  • Washer,flat — FSC 5310
  • Peripheral Shape Style: ROUND
  • Thickness: 0.049 INCHES NOMINAL IN
  • Material: STEEL OVERALL
  • Surface Treatment: TIN OVERALL
  • Center Hole Shape Style: ROUND
  • Cross-Sectional Shape Style: RECTANGULAR
  • Overall Diameter: 0.500 INCHES NOMINAL IN
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 5310-00-187-2366, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Department of the Air Force. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 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
NSN5310-00-187-2366
Primary Part Number940-8
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerDepartment of the Air Force
StatusACTIVE
Peripheral Shape StyleROUND
Thickness0.049 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Surface TreatmentTIN OVERALL
Center Hole Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
Overall Diameter0.500 INCHES NOMINAL IN
Hole Diameter0.182 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4520-00-172-9095AP-1938-013 INTERCHANGEABLE
Heating Element,electrical,nonim
Schmitt Walter H & Associates Inc Dba Schmitt Walter H & Associates Inc Div Dba/ Therm Coil Manufacturing Company
2825-00-175-88459408 INTERCHANGEABLE
Valve Stem Assembly
Northrop Grumman Systems Corporation Div Marine Systems
5360-00-200-23556662000 INTERCHANGEABLE
Spring,helical,compression
Alfa Laval Inc
4820-00-275-2224 INTERCHANGEABLE
Cock,drain
5210-00-277-1620599-9642-20 INTERCHANGEABLE
Gage Stock,thickness
Brown & Sharpe, Inc. Div Precision Measuring Instruments, Tesa Usa
9390-00-290-6135 INTERCHANGEABLE
Nonmetallic Special Shaped Secti
5915-00-496-21492920137-8 INTERCHANGEABLE
Filter,band Pass
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5330-00-636-0552 INTERCHANGEABLE
Gasket
5960-00-685-8999 INTERCHANGEABLE
Electron Tube
2990-00-725-6514T-6662 INTERCHANGEABLE
Muffler,exhaust
Cummins Filtration Inc.
Cross-Reference Index
Part NumberManufacturer
940-8 Department of the Air Force (USA)
6662 Raytheon Technical Services Company (USA)
940-8 Air Corps Standards Under Custodianiship of the Air Force
41H08 L-Tec Welding and Cutting Systems (USA)
41H08 Union Carbide Corp Sub of Dow Co the (USA)
AN940-8 Stewart-Warner Corporation (USA)
6026-8273-32 Raytheon Technical Services Company (USA)
Related Parts
4520-00-172-9095INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,NONIM
AP-1938-013
2825-00-175-8845INTERCHANGEABLE
VALVE STEM ASSEMBLY
9408
5360-00-200-2355INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
6662000
4820-00-275-2224INTERCHANGEABLE
COCK,DRAIN
5210-00-277-1620INTERCHANGEABLE
GAGE STOCK,THICKNESS
599-9642-20
9390-00-290-6135INTERCHANGEABLE
NONMETALLIC SPECIAL SHAPED SECTI
5915-00-496-2149INTERCHANGEABLE
FILTER,BAND PASS
2920137-8
5330-00-636-0552INTERCHANGEABLE
GASKET
5960-00-685-8999INTERCHANGEABLE
ELECTRON TUBE
2990-00-725-6514INTERCHANGEABLE
MUFFLER,EXHAUST
T-6662
2910-00-788-0989INTERCHANGEABLE
LEVER,THROTTLE
12221
5826-00-853-7369INTERCHANGEABLE
PANEL,FRONT,RECEIVE
6662

Frequently Asked Questions

What is NSN 5310-00-187-2366?

NSN 5310-00-187-2366 is a Washer,flat, manufactured by Department of the Air Force, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-187-2366?

NSN 5310-00-187-2366 has 7 cross-referenced part numbers: 940-8 (Department of the Air Force), 6662 (Raytheon Technical Services Company), 940-8 (Air Corps Standards Under Custodianiship of the Air Force), 41H08 (L-Tec Welding and Cutting Systems), 41H08 (Union Carbide Corp Sub of Dow Co the) and 2 more.

What NSN replaces 5310-00-187-2366?

There are 12 known substitutes for 5310-00-187-2366: 4520-00-172-9095, 2825-00-175-8845, 5360-00-200-2355 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 940-8?

Key specifications for 940-8: Peripheral Shape Style: ROUND; Thickness: 0.049 INCHES NOMINAL IN; Material: STEEL OVERALL; Surface Treatment: TIN OVERALL. 8 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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