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 5330-00-186-4943 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-186-4943 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-186-4943. Primary manufacturer part number: MILR5521.
Features
  • Retainer,packing — FSC 5330
  • Cross-Sectional Shape Style: SQUARE/RECTANGULAR
  • Peripheral Diameter: 2.084 INCHES MINIMUM AND 3.016 INCHES MAXIMUM IN
  • Material Document and Classification: MIL-W-5521 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Cross-Sectional Height: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
  • Material: LEATHER OVERALL
  • Center Hole Diameter: 1.818 INCHES MINIMUM AND 2.780 INCHES MAXIMUM IN
  • 4 verified cross-references
Applications
  • Applications requiring Leather Overall construction
General Description

The Retainer,packing, cataloged under National Stock Number 5330-00-186-4943, 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 4 commercial cross-references from 4 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
NSN5330-00-186-4943
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
Cross-Sectional Shape StyleSQUARE/RECTANGULAR
Peripheral Diameter2.084 INCHES MINIMUM AND 3.016 INCHES MAXIMUM IN
Material Document and ClassificationMIL-W-5521 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Cross-Sectional Height0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
MaterialLEATHER OVERALL
Center Hole Diameter1.818 INCHES MINIMUM AND 2.780 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
4710-00-078-472750058 INTERCHANGEABLE
Tube Assembly,metal
Nammo Defense Systems Inc. Dba Nammo Defense Systems Inc
3110-00-156-50551204 INTERCHANGEABLE
Bearing,ball,annular
Skf Usa Inc.
5330-00-171-6749 INTERCHANGEABLE
Retainer,packing
Cross-Reference Index
Part NumberManufacturer
MILR5521 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
A394X47 David Brown Hydraulics Inc Dba Hydreco (USA)
AN6244-10 Aeronautical Standards Group Dept of Navy and Air Force (USA)
50058 Colson Corp the (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
4710-00-078-4727INTERCHANGEABLE
TUBE ASSEMBLY,METAL
50058
3110-00-156-5055INTERCHANGEABLE
BEARING,BALL,ANNULAR
1204
5330-00-171-6749INTERCHANGEABLE
RETAINER,PACKING
5330-00-186-1309INTERCHANGEABLE
RETAINER,PACKING
5330-00-186-1338INTERCHANGEABLE
RETAINER,PACKING

Frequently Asked Questions

What is NSN 5330-00-186-4943?

NSN 5330-00-186-4943 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 5330-00-186-4943?

NSN 5330-00-186-4943 has 4 cross-referenced part numbers: MILR5521 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), A394X47 (David Brown Hydraulics Inc Dba Hydreco), AN6244-10 (Aeronautical Standards Group Dept of Navy and Air Force), 50058 (Colson Corp the).

What NSN replaces 5330-00-186-4943?

There are 12 known substitutes for 5330-00-186-4943: 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: Cross-Sectional Shape Style: SQUARE/RECTANGULAR; Peripheral Diameter: 2.084 INCHES MINIMUM AND 3.016 INCHES MAXIMUM IN; Material Document and Classification: MIL-W-5521 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Height: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5330-00-186-4943 still in active supply?

NSN 5330-00-186-4943 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