PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

55088Seal,plain Encased

Altra Industrial Motion Corp. · NSN 5330-00-556-8489 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-556-8489 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-556-8489. Primary manufacturer part number: 55088.
Features
  • Seal,plain Encased — FSC 5330
  • Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE CASE
  • Sealing Element Style: ANGULAR
  • Seal Width: 0.250 INCHES NOMINAL IN
  • Housing Bore Diameter: 1.2598 INCHES MINIMUM AND 1.2604 INCHES MAXIMUM IN
  • Case Style: SQUARE
  • Accommodated Shaft Diameter: 0.874 INCHES MINIMUM AND 0.876 INCHES MAXIMUM IN
  • Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
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 5330-00-556-8489, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Altra Industrial Motion Corp.. Government technical data includes 7 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5330-00-556-8489
Primary Part Number55088
Item NameSeal,plain Encased
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerAltra Industrial Motion Corp.
StatusACTIVE
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE CASE
Sealing Element StyleANGULAR
Seal Width0.250 INCHES NOMINAL IN
Housing Bore Diameter1.2598 INCHES MINIMUM AND 1.2604 INCHES MAXIMUM IN
Case StyleSQUARE
Accommodated Shaft Diameter0.874 INCHES MINIMUM AND 0.876 INCHES MAXIMUM IN
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5330-00-285-59537603520 INTERCHANGEABLE
Seal,plain Encased
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
5360-00-448-370955088 INTERCHANGEABLE
Spring,helical,extension
Telemechanics Inc
5961-00-683-4182352-9013-000 INTERCHANGEABLE
Transistor
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5980-01-014-0160472951 INTERCHANGEABLE
Display,optoelectronic
Fluke Corp
5995-01-332-175055088 INTERCHANGEABLE
Cable Assembly,radio Frequency
Semflex, Inc.
5930-01-539-149355088 INTERCHANGEABLE
Switch,toggle
Cole Hersee Company
5930-01-571-576555088 INTERCHANGEABLE
Switch,toggle
Hydraulics International, Inc. Dba Hydraulics International Inc
Cross-Reference Index
Part NumberManufacturer
472951 Federal-Mogul Corp Government Sales Dept (USA)
55088 PRIMARY Altra Industrial Motion Corp. (USA)
Related Parts
5330-00-285-5953INTERCHANGEABLE
SEAL,PLAIN ENCASED
7603520
5360-00-448-3709INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
55088
5961-00-683-4182INTERCHANGEABLE
TRANSISTOR
352-9013-000
5980-01-014-0160INTERCHANGEABLE
DISPLAY,OPTOELECTRONIC
472951
5995-01-332-1750INTERCHANGEABLE
CABLE ASSEMBLY,RADIO FREQUENCY
55088
5930-01-539-1493INTERCHANGEABLE
SWITCH,TOGGLE
55088
5930-01-571-5765INTERCHANGEABLE
SWITCH,TOGGLE
55088

Frequently Asked Questions

What is NSN 5330-00-556-8489?

NSN 5330-00-556-8489 is a Seal,plain Encased, manufactured by Altra Industrial Motion Corp., classified under FSC 5330 (No Item Name Available). Status: active.

What are the part numbers for NSN 5330-00-556-8489?

NSN 5330-00-556-8489 has 2 cross-referenced part numbers: 472951 (Federal-Mogul Corp Government Sales Dept), 55088 (Altra Industrial Motion Corp.).

What NSN replaces 5330-00-556-8489?

There are 7 known substitutes for 5330-00-556-8489: 5330-00-285-5953, 5360-00-448-3709, 5961-00-683-4182 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 55088?

Key specifications for 55088: Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE CASE; Sealing Element Style: ANGULAR; Seal Width: 0.250 INCHES NOMINAL IN; Housing Bore Diameter: 1.2598 INCHES MINIMUM AND 1.2604 INCHES MAXIMUM IN. 7 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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