PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

175-6Washer,flat

Lenz Inc Dba the Lenz Company · NSN 5310-00-997-1903 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-997-1903 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-997-1903. Primary manufacturer part number: 175-6.
Features
  • Washer,flat — FSC 5310
  • Hole Diameter: 0.375 INCHES NOMINAL IN
  • Material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL
  • Peripheral Shape Style: ROUND
  • Thickness: 0.031 INCHES NOMINAL IN
  • Overall Diameter: 0.500 INCHES NOMINAL IN
  • Center Hole Shape Style: ROUND
  • Cross-Sectional Shape Style: RECTANGULAR
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Plastic Polytetrafluoroethylene Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-997-1903, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Lenz Inc Dba the Lenz Company. Government technical data includes 7 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
NSN5310-00-997-1903
Primary Part Number175-6
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerLenz Inc Dba the Lenz Company
StatusACTIVE
Hole Diameter0.375 INCHES NOMINAL IN
MaterialPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
Peripheral Shape StyleROUND
Thickness0.031 INCHES NOMINAL IN
Overall Diameter0.500 INCHES NOMINAL IN
Center Hole Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5905-00-101-802624BG113D INTERCHANGEABLE
Resistor,fixed,wire Wound
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
5310-00-111-3639 INTERCHANGEABLE
Nut,sleeve
5950-00-147-1398304441 INTERCHANGEABLE
Reactor
Naval Ship Systems Command
6105-00-164-1046114098 INTERCHANGEABLE
Motor,direct Current
Symetrics Industries, Llc Dba Extant Aerospace Div Symetrics Industries Dba Extant Aerospace
5310-00-176-8109AN320-5 INTERCHANGEABLE
Nut,plain,slotted,hexagon
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5360-00-257-30251756 INTERCHANGEABLE
Spring,helical,compression
Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor
5940-00-549-64121756 INTERCHANGEABLE
Post,binding,electrical
Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron
5975-00-925-9314 INTERCHANGEABLE
Box Connector,electrical
5950-00-962-0246 INTERCHANGEABLE
Coil,radio Frequency
7930-01-053-375810-1756 INTERCHANGEABLE
Glass Cleaner
Gc/waldom Inc
Cross-Reference Index
Part NumberManufacturer
175-6 PRIMARY Lenz Inc Dba the Lenz Company (USA)
2256897PC1 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
Related Parts
5905-00-101-8026INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
24BG113D
5310-00-111-3639INTERCHANGEABLE
NUT,SLEEVE
5950-00-147-1398INTERCHANGEABLE
REACTOR
304441
6105-00-164-1046INTERCHANGEABLE
MOTOR,DIRECT CURRENT
114098
5310-00-176-8109INTERCHANGEABLE
NUT,PLAIN,SLOTTED,HEXAGON
AN320-5
5360-00-257-3025INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
1756
5940-00-549-6412INTERCHANGEABLE
POST,BINDING,ELECTRICAL
1756
5975-00-925-9314INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
5950-00-962-0246INTERCHANGEABLE
COIL,RADIO FREQUENCY
7930-01-053-3758INTERCHANGEABLE
GLASS CLEANER
10-1756
5940-01-053-5300INTERCHANGEABLE
TERMINAL BOARD
32AA18
5998-01-070-4138INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY

Frequently Asked Questions

What is NSN 5310-00-997-1903?

NSN 5310-00-997-1903 is a Washer,flat, manufactured by Lenz Inc Dba the Lenz Company, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-997-1903?

NSN 5310-00-997-1903 has 2 cross-referenced part numbers: 175-6 (Lenz Inc Dba the Lenz Company), 2256897PC1 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).

What NSN replaces 5310-00-997-1903?

There are 12 known substitutes for 5310-00-997-1903: 5905-00-101-8026, 5310-00-111-3639, 5950-00-147-1398 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 175-6?

Key specifications for 175-6: Hole Diameter: 0.375 INCHES NOMINAL IN; Material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL; Peripheral Shape Style: ROUND; 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.
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