PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS51920-12Seal,plain Encased

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5330-00-917-6245 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-917-6245 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-917-6245. Primary manufacturer part number: MS51920-12.
Features
  • Seal,plain Encased — FSC 5330
  • Sealing Element Style: ANGULAR
  • Accommodated Shaft Diameter: 1.375 INCHES NOMINAL IN
  • Seal Width: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
  • Case Style: SQUARE
  • Material: RUBBER SYNTHETIC OR LEATHER SEALING ELEMENT
  • Housing Bore Diameter: 1.873 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN
  • Surface Treatment: CADMIUM OR ZINC CASE
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Synthetic or Leather Sealing Element construction
General Description

The Seal,plain Encased, cataloged under National Stock Number 5330-00-917-6245, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 7 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5330-00-917-6245
Primary Part NumberMS51920-12
Item NameSeal,plain Encased
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Sealing Element StyleANGULAR
Accommodated Shaft Diameter1.375 INCHES NOMINAL IN
Seal Width0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
Case StyleSQUARE
MaterialRUBBER SYNTHETIC OR LEATHER SEALING ELEMENT
Housing Bore Diameter1.873 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN
Surface TreatmentCADMIUM OR ZINC CASE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
5330-01-041-2003 INTERCHANGEABLE
Seal,plain Encased
Cross-Reference Index
Part NumberManufacturer
MS51920-12 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5330-01-041-2003INTERCHANGEABLE
SEAL,PLAIN ENCASED

Frequently Asked Questions

What is NSN 5330-00-917-6245?

NSN 5330-00-917-6245 is a Seal,plain Encased, manufactured by Military Standards Promulgated by Military Departments 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 5330-00-917-6245?

NSN 5330-00-917-6245 has 1 cross-referenced part number: MS51920-12 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5330-00-917-6245?

There is 1 known substitute for 5330-00-917-6245: 5330-01-041-2003. Verify interchangeability with system specifications before substitution.

What are the specifications of MS51920-12?

Key specifications for MS51920-12: Sealing Element Style: ANGULAR; Accommodated Shaft Diameter: 1.375 INCHES NOMINAL IN; Seal Width: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN; Case Style: SQUARE. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5330-00-917-6245 still in active supply?

NSN 5330-00-917-6245 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.
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