PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

52-23Washer,lock

Pitney Bowes Inc. · NSN 5310-00-914-8728 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-914-8728 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-914-8728. Primary manufacturer part number: 52-23.
Features
  • Washer,lock — FSC 5310
  • Outside Diameter: 0.434 INCHES MAXIMUM IN
  • Test Data Document: 81348-FFW84 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
  • Nondefinitive Spec/std Data: A CLASS AND 4 STYLE
  • Material Thickness: 0.068 INCHES MINIMUM AND 0.074 INCHES MAXIMUM IN
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Hole Diameter: 0.194 INCHES MINIMUM AND 0.202 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-914-8728, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Pitney Bowes Inc.. Government technical data includes 8 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
NSN5310-00-914-8728
Primary Part Number52-23
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerPitney Bowes Inc.
StatusACTIVE
Outside Diameter0.434 INCHES MAXIMUM IN
Test Data Document81348-FFW84 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Hardness Rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
Nondefinitive Spec/std DataA CLASS AND 4 STYLE
Material Thickness0.068 INCHES MINIMUM AND 0.074 INCHES MAXIMUM IN
Style DesignatorSPLIT HELICAL-RIGHT HAND
Hole Diameter0.194 INCHES MINIMUM AND 0.202 INCHES MAXIMUM IN
Heat TreatmentQUENCHED AND TEMPERED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5950-00-227-86075223 INTERCHANGEABLE
Transformer,electri
The Bechdon Company, Llc
3120-00-371-2941 INTERCHANGEABLE
Bushing,sleeve
2520-00-462-1434 INTERCHANGEABLE
Sleeve,transmission
5975-00-802-6531 INTERCHANGEABLE
Box Connector,electrical
3030-00-933-5356110XL037 INTERCHANGEABLE
Belt,positive Drive
Gates Corporation
5220-01-133-989025DL INTERCHANGEABLE
Gage,thickness,electronic
Panametrics Llc
5340-01-141-1981 INTERCHANGEABLE
Insert
6625-01-145-23865223 INTERCHANGEABLE
Oscilloscope
Tektronix, Inc.
4820-01-210-6903 INTERCHANGEABLE
Valve,safety Relief
5940-01-331-02675223 INTERCHANGEABLE
Terminal,lug
Dialight Corporation
Cross-Reference Index
Part NumberManufacturer
52-23 PRIMARY Pitney Bowes Inc. (USA)
FFW84 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5950-00-227-8607INTERCHANGEABLE
TRANSFORMER,ELECTRI
5223
3120-00-371-2941INTERCHANGEABLE
BUSHING,SLEEVE
2520-00-462-1434INTERCHANGEABLE
SLEEVE,TRANSMISSION
5975-00-802-6531INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
3030-00-933-5356INTERCHANGEABLE
BELT,POSITIVE DRIVE
110XL037
5220-01-133-9890INTERCHANGEABLE
GAGE,THICKNESS,ELECTRONIC
25DL
5340-01-141-1981INTERCHANGEABLE
INSERT
6625-01-145-2386INTERCHANGEABLE
OSCILLOSCOPE
5223
4820-01-210-6903INTERCHANGEABLE
VALVE,SAFETY RELIEF
5940-01-331-0267INTERCHANGEABLE
TERMINAL,LUG
5223
4460-01-436-8969INTERCHANGEABLE
FILTER,AIR,ELECTROSTATIC
5223
1660-01-696-4560INTERCHANGEABLE
HEAT EXCHANGER,FLUID TO FLUID,AI
5223

Frequently Asked Questions

What is NSN 5310-00-914-8728?

NSN 5310-00-914-8728 is a Washer,lock, manufactured by Pitney Bowes Inc., classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-914-8728?

NSN 5310-00-914-8728 has 2 cross-referenced part numbers: 52-23 (Pitney Bowes Inc.), FFW84 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5310-00-914-8728?

There are 12 known substitutes for 5310-00-914-8728: 5950-00-227-8607, 3120-00-371-2941, 2520-00-462-1434 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 52-23?

Key specifications for 52-23: Outside Diameter: 0.434 INCHES MAXIMUM IN; Test Data Document: 81348-FFW84 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).; Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM; Nondefinitive Spec/std Data: A CLASS AND 4 STYLE. 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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