PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1L4777Seal,plain Encased

Caterpillar Inc Div Caterpillar Defense · NSN 5330-00-301-8372 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-301-8372 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-301-8372. Primary manufacturer part number: 1L4777.
Features
  • Seal,plain Encased — FSC 5330
  • Case Style: SQUARE
  • Seal Width: 0.313 INCHES NOMINAL IN
  • Housing Bore Diameter: 2.441 INCHES NOMINAL IN
  • Sealing Element Style: ANGULAR
  • Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
  • Accommodated Shaft Maximum Rated Speed: 3600 FEET PER MINUTE FT
  • Accommodated Shaft Diameter: 1.500 INCHES NOMINAL IN
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Butadiene-Acrylonitrile Class Nbr Sealing Element construction
General Description

The Seal,plain Encased, cataloged under National Stock Number 5330-00-301-8372, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5330-00-301-8372
Primary Part Number1L4777
Item NameSeal,plain Encased
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusCANCELLED
Case StyleSQUARE
Seal Width0.313 INCHES NOMINAL IN
Housing Bore Diameter2.441 INCHES NOMINAL IN
Sealing Element StyleANGULAR
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
Accommodated Shaft Maximum Rated Speed3600 FEET PER MINUTE FT
Accommodated Shaft Diameter1.500 INCHES NOMINAL IN
Outside Diameter2.445 INCHES NOMINAL IN
Temp Rating-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
3110-00-100-0583643280 INTERCHANGEABLE
Cup,tapered Roller Bearing
Wiggins Lift Co Inc
4320-00-375-9044 INTERCHANGEABLE
Sleeve,shaft,pump
9540-00-528-8840 INTERCHANGEABLE
Angle,structural
5950-01-022-0479 INTERCHANGEABLE
Transformer,power
Cross-Reference Index
Part NumberManufacturer
480814SK Federal-Mogul Corp Government Sales Dept (USA)
244W116M1 Skf Usa Inc. Dba Skf Aerospace Sealing Solutions (USA)
244116 Arrow-Master, Incorporated (USA)
15092 Skf Usa Inc. Dba Skf Aerospace Sealing Solutions (USA)
1L4777 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
Related Parts
3110-00-100-0583INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
643280
4320-00-375-9044INTERCHANGEABLE
SLEEVE,SHAFT,PUMP
9540-00-528-8840INTERCHANGEABLE
ANGLE,STRUCTURAL
5950-01-022-0479INTERCHANGEABLE
TRANSFORMER,POWER

Frequently Asked Questions

What is NSN 5330-00-301-8372?

NSN 5330-00-301-8372 is a Seal,plain Encased, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5330 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5330-00-301-8372?

NSN 5330-00-301-8372 has 5 cross-referenced part numbers: 480814SK (Federal-Mogul Corp Government Sales Dept), 244W116M1 (Skf Usa Inc. Dba Skf Aerospace Sealing Solutions), 244116 (Arrow-Master, Incorporated), 15092 (Skf Usa Inc. Dba Skf Aerospace Sealing Solutions), 1L4777 (Caterpillar Inc Div Caterpillar Defense).

What NSN replaces 5330-00-301-8372?

There are 4 known substitutes for 5330-00-301-8372: 3110-00-100-0583, 4320-00-375-9044, 9540-00-528-8840 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1L4777?

Key specifications for 1L4777: Case Style: SQUARE; Seal Width: 0.313 INCHES NOMINAL IN; Housing Bore Diameter: 2.441 INCHES NOMINAL IN; Sealing Element Style: ANGULAR. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5330-00-301-8372 still in active supply?

NSN 5330-00-301-8372 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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