PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12520Seal,plain Encased

Skf Usa Inc. Dba Skf Aerospace Sealing Solutions · NSN 5330-00-179-2102 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-179-2102 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-179-2102. Primary manufacturer part number: 12520.
Features
  • Seal,plain Encased — FSC 5330
  • Seal Width: 0.375 INCHES NOMINAL IN
  • Accommodated Shaft Maximum Rated Speed: 2000 FEET PER MINUTE FT
  • Housing Bore Diameter: 1.250 INCHES NOMINAL IN
  • Material: STEEL CASE
  • Material: LEATHER SEALING ELEMENT
  • Accommodated Shaft Diameter: 0.625 INCHES NOMINAL IN
  • Case Style: SQUARE
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Steel Case construction
General Description

The Seal,plain Encased, cataloged under National Stock Number 5330-00-179-2102, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Skf Usa Inc. Dba Skf Aerospace Sealing Solutions. Government technical data includes 8 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
NSN5330-00-179-2102
Primary Part Number12520
Item NameSeal,plain Encased
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerSkf Usa Inc. Dba Skf Aerospace Sealing Solutions
StatusACTIVE
Seal Width0.375 INCHES NOMINAL IN
Accommodated Shaft Maximum Rated Speed2000 FEET PER MINUTE FT
Housing Bore Diameter1.250 INCHES NOMINAL IN
MaterialSTEEL CASE
MaterialLEATHER SEALING ELEMENT
Accommodated Shaft Diameter0.625 INCHES NOMINAL IN
Case StyleSQUARE
Sealing Element StyleANGULAR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-100-051112520 INTERCHANGEABLE
Cup,tapered Roller Bearing
Federal-Mogul Corp Government Sales Dept
5930-00-177-274912520 INTERCHANGEABLE
Switch,rotary
Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp
4710-00-278-136812520 INTERCHANGEABLE
Tube,metallic
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
5905-00-535-38319003013 INTERCHANGEABLE
Resistor,variable,wire Wound,pre
Us Army Aviation and Missile Command
3110-00-554-5610365GAP INTERCHANGEABLE
Bearing,ball,annular
Fag Bearings Corporation
5310-00-817-1011500-18 INTERCHANGEABLE
Washer,spring Tension
Barnes Group Inc
5360-00-838-0452500-18 INTERCHANGEABLE
Spring,valve
Rotary Vacuum Pumps Inc
5355-00-958-9986MS91528-1C1B INTERCHANGEABLE
Knob
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
4320-01-035-3929 INTERCHANGEABLE
Valve Rod
4610-01-134-2399500-18 INTERCHANGEABLE
Kit
Veolia Wts Systems Usa, Inc. Dba Ge Water & Process Technologies
Cross-Reference Index
Part NumberManufacturer
50018 Federal-Mogul Corp Chassis Products Div (USA)
12520 PRIMARY Skf Usa Inc. Dba Skf Aerospace Sealing Solutions (USA)
Related Parts
3110-00-100-0511INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
12520
5930-00-177-2749INTERCHANGEABLE
SWITCH,ROTARY
12520
4710-00-278-1368INTERCHANGEABLE
TUBE,METALLIC
12520
5905-00-535-3831INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,PRE
9003013
3110-00-554-5610INTERCHANGEABLE
BEARING,BALL,ANNULAR
365GAP
5310-00-817-1011INTERCHANGEABLE
WASHER,SPRING TENSION
500-18
5360-00-838-0452INTERCHANGEABLE
SPRING,VALVE
500-18
5355-00-958-9986INTERCHANGEABLE
KNOB
MS91528-1C1B
4320-01-035-3929INTERCHANGEABLE
VALVE ROD
4610-01-134-2399INTERCHANGEABLE
KIT
500-18
3930-01-184-4340INTERCHANGEABLE
PARTS KIT,LINEAR ACTUATING CYLIN
5950-01-245-1197INTERCHANGEABLE
TRANSFORMER
66610-006

Frequently Asked Questions

What is NSN 5330-00-179-2102?

NSN 5330-00-179-2102 is a Seal,plain Encased, manufactured by Skf Usa Inc. Dba Skf Aerospace Sealing Solutions, classified under FSC 5330 (No Item Name Available). Status: active.

What are the part numbers for NSN 5330-00-179-2102?

NSN 5330-00-179-2102 has 2 cross-referenced part numbers: 50018 (Federal-Mogul Corp Chassis Products Div), 12520 (Skf Usa Inc. Dba Skf Aerospace Sealing Solutions).

What NSN replaces 5330-00-179-2102?

There are 12 known substitutes for 5330-00-179-2102: 3110-00-100-0511, 5930-00-177-2749, 4710-00-278-1368 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12520?

Key specifications for 12520: Seal Width: 0.375 INCHES NOMINAL IN; Accommodated Shaft Maximum Rated Speed: 2000 FEET PER MINUTE FT; Housing Bore Diameter: 1.250 INCHES NOMINAL IN; Material: STEEL CASE. 8 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com