PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILR5521Gasket

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5330-00-058-2814 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-058-2814 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-058-2814. Primary manufacturer part number: MILR5521.
Features
  • Gasket — FSC 5330
  • Cross-Sectional Shape Style: SOLID SINGLE OR COMPOSITION
  • Cross-Sectional Thickness: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
  • Outside Diameter: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
  • Style Designator: CIRCULAR
  • Material: LEATHER OVERALL
  • Aperture Diameter: 0.381 INCHES MINIMUM AND 0.396 INCHES MAXIMUM IN
  • 1 verified cross-reference
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Leather Overall construction
General Description

The Gasket, cataloged under National Stock Number 5330-00-058-2814, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 6 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5330-00-058-2814
Primary Part NumberMILR5521
Item NameGasket
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Cross-Sectional Shape StyleSOLID SINGLE OR COMPOSITION
Cross-Sectional Thickness0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
Outside Diameter0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
Style DesignatorCIRCULAR
MaterialLEATHER OVERALL
Aperture Diameter0.381 INCHES MINIMUM AND 0.396 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5310-00-058-2813 INTERCHANGEABLE
Washer,flat
5330-00-058-2830 INTERCHANGEABLE
Gasket
5365-00-058-2838 INTERCHANGEABLE
Spacer,ring
5330-00-058-2845 INTERCHANGEABLE
Gasket
5330-00-058-2868 INTERCHANGEABLE
Gasket
5330-00-071-6863 INTERCHANGEABLE
Retainer,packing
5330-00-171-6749 INTERCHANGEABLE
Retainer,packing
5330-00-186-1309 INTERCHANGEABLE
Retainer,packing
5330-00-186-1338 INTERCHANGEABLE
Retainer,packing
5330-00-186-1341 INTERCHANGEABLE
Gasket
Cross-Reference Index
Part NumberManufacturer
MILR5521 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5310-00-058-2813INTERCHANGEABLE
WASHER,FLAT
5330-00-058-2830INTERCHANGEABLE
GASKET
5365-00-058-2838INTERCHANGEABLE
SPACER,RING
5330-00-058-2845INTERCHANGEABLE
GASKET
5330-00-058-2868INTERCHANGEABLE
GASKET
5330-00-071-6863INTERCHANGEABLE
RETAINER,PACKING
5330-00-171-6749INTERCHANGEABLE
RETAINER,PACKING
5330-00-186-1309INTERCHANGEABLE
RETAINER,PACKING
5330-00-186-1338INTERCHANGEABLE
RETAINER,PACKING
5330-00-186-1341INTERCHANGEABLE
GASKET
5330-00-186-4943INTERCHANGEABLE
RETAINER,PACKING
5330-00-531-4601INTERCHANGEABLE
RETAINER,PACKING

Frequently Asked Questions

What is NSN 5330-00-058-2814?

NSN 5330-00-058-2814 is a Gasket, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5330 (No Item Name Available). Status: active.

What are the part numbers for NSN 5330-00-058-2814?

NSN 5330-00-058-2814 has 1 cross-referenced part number: MILR5521 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5330-00-058-2814?

There are 12 known substitutes for 5330-00-058-2814: 5310-00-058-2813, 5330-00-058-2830, 5365-00-058-2838 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILR5521?

Key specifications for MILR5521: Cross-Sectional Shape Style: SOLID SINGLE OR COMPOSITION; Cross-Sectional Thickness: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN; Outside Diameter: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN; Style Designator: CIRCULAR. 6 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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