PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILR5521Retainer,packing

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5330-00-186-1309 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-186-1309 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-186-1309. Primary manufacturer part number: MILR5521.
Features
  • Retainer,packing — FSC 5330
  • Peripheral Diameter: 1.296 INCHES MINIMUM AND 1.328 INCHES MAXIMUM IN
  • Material Document and Classification: MIL-W-5521 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Center Hole Diameter: 1.030 INCHES MINIMUM AND 1.092 INCHES MAXIMUM IN
  • Material: LEATHER OVERALL
  • Cross-Sectional Shape Style: SQUARE/RECTANGULAR
  • Cross-Sectional Height: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
  • 6 verified cross-references
Applications
  • Applications requiring Leather Overall construction
General Description

The Retainer,packing, cataloged under National Stock Number 5330-00-186-1309, 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 6 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5330-00-186-1309
Primary Part NumberMILR5521
Item NameRetainer,packing
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Peripheral Diameter1.296 INCHES MINIMUM AND 1.328 INCHES MAXIMUM IN
Material Document and ClassificationMIL-W-5521 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Center Hole Diameter1.030 INCHES MINIMUM AND 1.092 INCHES MAXIMUM IN
MaterialLEATHER OVERALL
Cross-Sectional Shape StyleSQUARE/RECTANGULAR
Cross-Sectional Height0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5310-00-058-2813 INTERCHANGEABLE
Washer,flat
5330-00-058-2814 INTERCHANGEABLE
Gasket
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
5330-00-186-1338 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
298S20 Bendix Corp the (USA)
AN6246-20 Aeronautical Standards Group Dept of Navy and Air Force (USA)
298S20 Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St) (USA)
AN6246-20 Air Force-Navy Aeronautical Specifications Promulgated by Aeronautical Standards Group
43620 Prosperity a Div of Ametek Inc (USA)
Related Parts
5310-00-058-2813INTERCHANGEABLE
WASHER,FLAT
5330-00-058-2814INTERCHANGEABLE
GASKET
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
5330-00-186-1338INTERCHANGEABLE
RETAINER,PACKING
5330-00-186-1341INTERCHANGEABLE
GASKET
5330-00-186-4943INTERCHANGEABLE
RETAINER,PACKING
2910-00-506-4935INTERCHANGEABLE
NEEDLE ASSY,CARBURE

Frequently Asked Questions

What is NSN 5330-00-186-1309?

NSN 5330-00-186-1309 is a Retainer,packing, 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: cancelled.

What are the part numbers for NSN 5330-00-186-1309?

NSN 5330-00-186-1309 has 6 cross-referenced part numbers: MILR5521 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 298S20 (Bendix Corp the), AN6246-20 (Aeronautical Standards Group Dept of Navy and Air Force), 298S20 (Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St)), AN6246-20 (Air Force-Navy Aeronautical Specifications Promulgated by Aeronautical Standards Group) and 1 more.

What NSN replaces 5330-00-186-1309?

There are 12 known substitutes for 5330-00-186-1309: 5310-00-058-2813, 5330-00-058-2814, 5330-00-058-2830 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILR5521?

Key specifications for MILR5521: Peripheral Diameter: 1.296 INCHES MINIMUM AND 1.328 INCHES MAXIMUM IN; Material Document and Classification: MIL-W-5521 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Center Hole Diameter: 1.030 INCHES MINIMUM AND 1.092 INCHES MAXIMUM IN; Material: LEATHER OVERALL. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5330-00-186-1309 still in active supply?

NSN 5330-00-186-1309 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com