PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18581Seal,plain Encased

Skf Usa Inc. Dba Skf Aerospace Sealing Solutions · NSN 5330-00-489-0958 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-489-0958 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-489-0958. Primary manufacturer part number: 18581.
Features
  • Seal,plain Encased — FSC 5330
  • Material: STEEL CASE
  • Seal Width: 0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
  • Accommodated Shaft Diameter: 1.875 INCHES NOMINAL IN
  • Surface Treatment: PLASTIC CASE
  • Case Style: SQUARE
  • Outside Diameter: 2.627 INCHES NOMINAL IN
  • Material: RUBBER SYNTHETIC SEALING ELEMENT
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 5330-00-489-0958, 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 10 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5330-00-489-0958
Primary Part Number18581
Item NameSeal,plain Encased
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerSkf Usa Inc. Dba Skf Aerospace Sealing Solutions
StatusACTIVE
MaterialSTEEL CASE
Seal Width0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
Accommodated Shaft Diameter1.875 INCHES NOMINAL IN
Surface TreatmentPLASTIC CASE
Case StyleSQUARE
Outside Diameter2.627 INCHES NOMINAL IN
MaterialRUBBER SYNTHETIC SEALING ELEMENT
Sealing Element StyleVERTICAL
Temp Rating-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
Housing Bore Diameter2.622 INCHES MINIMUM AND 2.624 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5310-00-145-245918-58-1 INTERCHANGEABLE
Washer,flat
All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners
2530-00-670-3832920556 INTERCHANGEABLE
Parts Kit,steering Gear
Am General Llc
5950-00-900-007718581 INTERCHANGEABLE
Transformer,audio Frequency
Astec America Inc.
4935-00-911-2926 INTERCHANGEABLE
Cover Assembly,pump
5950-01-011-3415SM-C-416400 INTERCHANGEABLE
Transformer,radio Frequency
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5306-01-137-302018581 INTERCHANGEABLE
Bolt,pump,fuel Boos
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
Cross-Reference Index
Part NumberManufacturer
18581 PRIMARY Skf Usa Inc. Dba Skf Aerospace Sealing Solutions (USA)
Related Parts
5310-00-145-2459INTERCHANGEABLE
WASHER,FLAT
18-58-1
2530-00-670-3832INTERCHANGEABLE
PARTS KIT,STEERING GEAR
920556
5950-00-900-0077INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
18581
4935-00-911-2926INTERCHANGEABLE
COVER ASSEMBLY,PUMP
5950-01-011-3415INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
SM-C-416400
5306-01-137-3020INTERCHANGEABLE
BOLT,PUMP,FUEL BOOS
18581

Frequently Asked Questions

What is NSN 5330-00-489-0958?

NSN 5330-00-489-0958 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 5330-00-489-0958?

NSN 5330-00-489-0958 has 1 cross-referenced part number: 18581 (Skf Usa Inc. Dba Skf Aerospace Sealing Solutions).

What NSN replaces 5330-00-489-0958?

There are 6 known substitutes for 5330-00-489-0958: 5310-00-145-2459, 2530-00-670-3832, 5950-00-900-0077 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18581?

Key specifications for 18581: Material: STEEL CASE; Seal Width: 0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN; Accommodated Shaft Diameter: 1.875 INCHES NOMINAL IN; Surface Treatment: PLASTIC CASE. 10 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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