PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILR5521Spacer,ring

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5365-00-058-2838 · FSC 5365 · No Item Name Available
Verified by PartsTable
NSN 5365-00-058-2838 — this item is cataloged by the U.S. Government under National Stock Number 5365-00-058-2838. Primary manufacturer part number: MILR5521.
Features
  • Spacer,ring — FSC 5365
  • Overall Thickness: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
  • Inside Diameter: 2.004 INCHES NOMINAL IN
  • Outside Diameter: 2.234 INCHES MINIMUM AND 2.266 INCHES MAXIMUM IN
  • 2 verified cross-references
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Spacer,ring, cataloged under National Stock Number 5365-00-058-2838, is classified within Federal Supply Class 5365 (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 3 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
NSN5365-00-058-2838
Primary Part NumberMILR5521
Item NameSpacer,ring
FSC / FSG5365 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Overall Thickness0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
Inside Diameter2.004 INCHES NOMINAL IN
Outside Diameter2.234 INCHES MINIMUM AND 2.266 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5310-00-058-2813 INTERCHANGEABLE
Washer,flat
5330-00-058-2814 INTERCHANGEABLE
Gasket
5330-00-058-2830 INTERCHANGEABLE
Gasket
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
582838 Army Weapons Command Attn Amswe-Ree-S (USA)
Related Parts
5310-00-058-2813INTERCHANGEABLE
WASHER,FLAT
5330-00-058-2814INTERCHANGEABLE
GASKET
5330-00-058-2830INTERCHANGEABLE
GASKET
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
4720-00-491-0913INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
212119-8B61-0220

Frequently Asked Questions

What is NSN 5365-00-058-2838?

NSN 5365-00-058-2838 is a Spacer,ring, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5365 (No Item Name Available). Status: active.

What are the part numbers for NSN 5365-00-058-2838?

NSN 5365-00-058-2838 has 2 cross-referenced part numbers: MILR5521 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 582838 (Army Weapons Command Attn Amswe-Ree-S).

What NSN replaces 5365-00-058-2838?

There are 12 known substitutes for 5365-00-058-2838: 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: Overall Thickness: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN; Inside Diameter: 2.004 INCHES NOMINAL IN; Outside Diameter: 2.234 INCHES MINIMUM AND 2.266 INCHES MAXIMUM IN. 3 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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