PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

0188-7Washer,flat

Lockheed Martin Corporation Div Rms - Mitchel Field · NSN 5310-01-025-3484 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-025-3484 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-025-3484. Primary manufacturer part number: 0188-7.
Features
  • Washer,flat — FSC 5310
  • Hole Diameter: 0.143 INCHES MINIMUM AND 0.153 INCHES MAXIMUM IN
  • Material: STEEL COMP 301 OR STEEL COMP 302 OVERALL
  • Surface Treatment: PASSIVATE OVERALL
  • Reference Number Differentiating Characteristics: M1L-Q-21549B-SP24-1
  • Cross-Sectional Shape Style: RECTANGULAR
  • Center Hole Shape Style: ROUND
  • Overall Diameter: 0.323 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 301 or Steel Comp 302 Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-025-3484, 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 - Mitchel Field. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-025-3484
Primary Part Number0188-7
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Rms - Mitchel Field
StatusACTIVE
Hole Diameter0.143 INCHES MINIMUM AND 0.153 INCHES MAXIMUM IN
MaterialSTEEL COMP 301 OR STEEL COMP 302 OVERALL
Surface TreatmentPASSIVATE OVERALL
Reference Number Differentiating CharacteristicsM1L-Q-21549B-SP24-1
Cross-Sectional Shape StyleRECTANGULAR
Center Hole Shape StyleROUND
Overall Diameter0.323 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
Peripheral Shape StyleROUND
Thickness0.031 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5310-00-275-13470188-7 INTERCHANGEABLE
Washer,flat
Lockheed Martin Corporation Div Rms - Mitchel Field
5815-00-916-86906002-534 INTERCHANGEABLE
Hammer,stop
Raytheon Company Div Rmd Strategic
5935-00-930-2667 INTERCHANGEABLE
Connector,receptacle,electrical
4730-01-391-3878P4MC4 INTERCHANGEABLE
Adapter,straight,pipe to Tube
Parker-Hannifin Corp Div Parflex Division
5342-01-706-135501887 INTERCHANGEABLE
Clamp,loop
End of the Road, Inc.
Cross-Reference Index
Part NumberManufacturer
0188-7 Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
Related Parts
5310-00-275-1347INTERCHANGEABLE
WASHER,FLAT
0188-7
5815-00-916-8690INTERCHANGEABLE
HAMMER,STOP
6002-534
5935-00-930-2667INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
4730-01-391-3878INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
P4MC4
5342-01-706-1355INTERCHANGEABLE
CLAMP,LOOP
01887

Frequently Asked Questions

What is NSN 5310-01-025-3484?

NSN 5310-01-025-3484 is a Washer,flat, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-025-3484?

NSN 5310-01-025-3484 has 1 cross-referenced part number: 0188-7 (Lockheed Martin Corporation Div Rms - Mitchel Field).

What NSN replaces 5310-01-025-3484?

There are 5 known substitutes for 5310-01-025-3484: 5310-00-275-1347, 5815-00-916-8690, 5935-00-930-2667 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 0188-7?

Key specifications for 0188-7: Hole Diameter: 0.143 INCHES MINIMUM AND 0.153 INCHES MAXIMUM IN; Material: STEEL COMP 301 OR STEEL COMP 302 OVERALL; Surface Treatment: PASSIVATE OVERALL; Reference Number Differentiating Characteristics: M1L-Q-21549B-SP24-1. 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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