PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

188-8Washer,flat

Lockheed Martin Corporation Div Rms · NSN 5310-00-014-8099 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-014-8099 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-014-8099. Primary manufacturer part number: 188-8.
Features
  • Washer,flat — FSC 5310
  • Material: STEEL COMP 8 OVERALL
  • Material Document and Classification: MIL-S-854 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Cross-Sectional Shape Style: RECTANGULAR
  • Peripheral Shape Style: ROUND
  • Overall Diameter: 0.438 INCHES NOMINAL IN
  • Center Hole Shape Style: ROUND
  • Thickness: 0.049 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 8 Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-014-8099, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 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
NSN5310-00-014-8099
Primary Part Number188-8
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Rms
StatusACTIVE
MaterialSTEEL COMP 8 OVERALL
Material Document and ClassificationMIL-S-854 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Cross-Sectional Shape StyleRECTANGULAR
Peripheral Shape StyleROUND
Overall Diameter0.438 INCHES NOMINAL IN
Center Hole Shape StyleROUND
Thickness0.049 INCHES NOMINAL IN
Surface TreatmentPASSIVATE OVERALL
Hole Diameter0.188 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5305-00-004-21941888 INTERCHANGEABLE
Screw,shoulder
L3harris Technologies, Inc. Div Space and Airborne Systems
3030-00-080-8768AP38 INTERCHANGEABLE
Belt,v
Carlisle Power Transmission Products Inc
5935-00-173-72851299 INTERCHANGEABLE
Connector,receptacle,electrical
Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron
5950-00-199-17491888 INTERCHANGEABLE
Transformer,power
Freed Transformer Co
5330-00-640-9476 INTERCHANGEABLE
Packing,preformed
5910-00-754-69560180-0065 INTERCHANGEABLE
Capacitor,fixed,electrolytic
Agilent Technologies, Inc. Div Agilent Technologies Headquarters
5330-00-832-77621888 INTERCHANGEABLE
Seal,nonmetallic Special Shaped
Rubbercraft Corporation of California, Ltd. Dba Rubbercraft Corp
5136-00-889-6965 INTERCHANGEABLE
Tap,thread Cutting
6240-00-946-96551888 INTERCHANGEABLE
Lamp,incandescent
Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
6220-01-037-655811242 INTERCHANGEABLE
Wire Assembly,lamp Landing Light
Grimes Aerospace Company
Cross-Reference Index
Part NumberManufacturer
11242 Gaf Corp Office Systems Div Sales and Service (USA)
188-8 Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
148099 Army Weapons Command Attn Amswe-Ree-S (USA)
188-8 PRIMARY Lockheed Martin Corporation Div Rms (USA)
Related Parts
5305-00-004-2194INTERCHANGEABLE
SCREW,SHOULDER
1888
3030-00-080-8768INTERCHANGEABLE
BELT,V
AP38
5935-00-173-7285INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
1299
5950-00-199-1749INTERCHANGEABLE
TRANSFORMER,POWER
1888
5330-00-640-9476INTERCHANGEABLE
PACKING,PREFORMED
5910-00-754-6956INTERCHANGEABLE
CAPACITOR,FIXED,ELECTROLYTIC
0180-0065
5330-00-832-7762INTERCHANGEABLE
SEAL,NONMETALLIC SPECIAL SHAPED
1888
5136-00-889-6965INTERCHANGEABLE
TAP,THREAD CUTTING
6240-00-946-9655INTERCHANGEABLE
LAMP,INCANDESCENT
1888
6220-01-037-6558INTERCHANGEABLE
WIRE ASSEMBLY,LAMP LANDING LIGHT
11242
5315-01-173-3805INTERCHANGEABLE
PIN,STRAIGHT,HEADED
11242
5340-01-175-9151INTERCHANGEABLE
STRIKE,CATCH
0188X00008

Frequently Asked Questions

What is NSN 5310-00-014-8099?

NSN 5310-00-014-8099 is a Washer,flat, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-014-8099?

NSN 5310-00-014-8099 has 4 cross-referenced part numbers: 11242 (Gaf Corp Office Systems Div Sales and Service), 188-8 (Lockheed Martin Corporation Div Rms - Mitchel Field), 148099 (Army Weapons Command Attn Amswe-Ree-S), 188-8 (Lockheed Martin Corporation Div Rms).

What NSN replaces 5310-00-014-8099?

There are 12 known substitutes for 5310-00-014-8099: 5305-00-004-2194, 3030-00-080-8768, 5935-00-173-7285 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 188-8?

Key specifications for 188-8: Material: STEEL COMP 8 OVERALL; Material Document and Classification: MIL-S-854 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 9 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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