PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

43-1221Seal,plain Encased

Federal-Mogul Corp Sealing Products Group Van Wert Plant · NSN 5330-00-285-6386 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-285-6386 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-285-6386. Primary manufacturer part number: 43-1221.
Features
  • Seal,plain Encased — FSC 5330
  • Case Style: SQUARE
  • Housing Bore Diameter: 3.061 INCHES NOMINAL IN
  • Seal Width: 0.406 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
  • Accommodated Shaft Diameter: 2.000 INCHES NOMINAL IN
  • Sealing Element Style: ANGULAR
  • Material: RUBBER SYNTHETIC SEALING ELEMENT B
  • Material: LEATHER SEALING ELEMENT A
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Synthetic Sealing Element B construction
General Description

The Seal,plain Encased, cataloged under National Stock Number 5330-00-285-6386, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Federal-Mogul Corp Sealing Products Group Van Wert Plant. Government technical data includes 8 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5330-00-285-6386
Primary Part Number43-1221
Item NameSeal,plain Encased
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerFederal-Mogul Corp Sealing Products Group Van Wert Plant
StatusACTIVE
Case StyleSQUARE
Housing Bore Diameter3.061 INCHES NOMINAL IN
Seal Width0.406 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
Accommodated Shaft Diameter2.000 INCHES NOMINAL IN
Sealing Element StyleANGULAR
MaterialRUBBER SYNTHETIC SEALING ELEMENT B
MaterialLEATHER SEALING ELEMENT A
Accommodated Shaft Maximum Rated Speed2000 FEET PER MINUTE FT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5330-00-641-2171 INTERCHANGEABLE
Seal,plain Encased
1270-00-656-3452431221 INTERCHANGEABLE
Socket,shield Assy
Raytheon Company Dba Raytheon
6350-01-300-6267MM-35 INTERCHANGEABLE
Module,meter,batter
Siemens Building Technologies Dba Siemens Fire Safety Division Div Siemens Building Technologies Inc.
Cross-Reference Index
Part NumberManufacturer
59586R91 Navistar International Corporation Dba Navistar (USA)
43-1221 Federal-Mogul Corp Chassis Products Div (USA)
43-1221 PRIMARY Federal-Mogul Corp Sealing Products Group Van Wert Plant (USA)
MM35 PRIMARY W S Darley & Co (USA)
Related Parts
5330-00-641-2171INTERCHANGEABLE
SEAL,PLAIN ENCASED
1270-00-656-3452INTERCHANGEABLE
SOCKET,SHIELD ASSY
431221
6350-01-300-6267INTERCHANGEABLE
MODULE,METER,BATTER
MM-35

Frequently Asked Questions

What is NSN 5330-00-285-6386?

NSN 5330-00-285-6386 is a Seal,plain Encased, manufactured by Federal-Mogul Corp Sealing Products Group Van Wert Plant, classified under FSC 5330 (No Item Name Available). Status: active.

What are the part numbers for NSN 5330-00-285-6386?

NSN 5330-00-285-6386 has 4 cross-referenced part numbers: 59586R91 (Navistar International Corporation Dba Navistar), 43-1221 (Federal-Mogul Corp Chassis Products Div), 43-1221 (Federal-Mogul Corp Sealing Products Group Van Wert Plant), MM35 (W S Darley & Co).

What NSN replaces 5330-00-285-6386?

There are 3 known substitutes for 5330-00-285-6386: 5330-00-641-2171, 1270-00-656-3452, 6350-01-300-6267. Verify interchangeability with system specifications before substitution.

What are the specifications of 43-1221?

Key specifications for 43-1221: Case Style: SQUARE; Housing Bore Diameter: 3.061 INCHES NOMINAL IN; Seal Width: 0.406 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN; Accommodated Shaft Diameter: 2.000 INCHES NOMINAL IN. 8 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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