PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

91455A999Washer,flat

Mcmaster-Carr Supply Co · NSN 5310-01-572-4252 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-572-4252 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-572-4252. Primary manufacturer part number: 91455A999.
Features
  • Washer,flat — FSC 5310
  • Thickness: 2.3 MILLIMETERS MINIMUM AND 2.7 MILLIMETERS MAXIMUM MM
  • Material: STEEL OVERALL
  • Surface Treatment: ZINC OVERALL
  • Surface Treatment Document and Classification: ASTM B633, SC1. TYPE II NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Center Hole Shape Style: ROUND
  • Hole Diameter: 13.0 MILLIMETERS MINIMUM AND 13.2 MILLIMETERS MAXIMUM MM
  • Overall Diameter: 23.4 MILLIMETERS MINIMUM AND 24.0 MILLIMETERS MAXIMUM MM
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 5310-01-572-4252, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-572-4252
Primary Part Number91455A999
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMcmaster-Carr Supply Co
StatusACTIVE
Thickness2.3 MILLIMETERS MINIMUM AND 2.7 MILLIMETERS MAXIMUM MM
MaterialSTEEL OVERALL
Surface TreatmentZINC OVERALL
Surface Treatment Document and ClassificationASTM B633, SC1. TYPE II NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL
Center Hole Shape StyleROUND
Hole Diameter13.0 MILLIMETERS MINIMUM AND 13.2 MILLIMETERS MAXIMUM MM
Overall Diameter23.4 MILLIMETERS MINIMUM AND 24.0 MILLIMETERS MAXIMUM MM
Peripheral Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
ColorYELLOW OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5310-01-563-6434MW6420000YZ0000 INTERCHANGEABLE
Washer,flat
Fastenal Company Dba Fastenal Co
Cross-Reference Index
Part NumberManufacturer
MW6420000YZ0000 Mcmaster-Carr Supply Co (USA)
91455A999 PRIMARY Mcmaster-Carr Supply Co (USA)
Related Parts
5310-01-563-6434INTERCHANGEABLE
WASHER,FLAT
MW6420000YZ0000

Frequently Asked Questions

What is NSN 5310-01-572-4252?

NSN 5310-01-572-4252 is a Washer,flat, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-572-4252?

NSN 5310-01-572-4252 has 2 cross-referenced part numbers: MW6420000YZ0000 (Mcmaster-Carr Supply Co), 91455A999 (Mcmaster-Carr Supply Co).

What NSN replaces 5310-01-572-4252?

There is 1 known substitute for 5310-01-572-4252: 5310-01-563-6434. Verify interchangeability with system specifications before substitution.

What are the specifications of 91455A999?

Key specifications for 91455A999: Thickness: 2.3 MILLIMETERS MINIMUM AND 2.7 MILLIMETERS MAXIMUM MM; Material: STEEL OVERALL; Surface Treatment: ZINC OVERALL; Surface Treatment Document and Classification: ASTM B633, SC1. TYPE II NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL. 12 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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