PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

70638O-Ring

Caterpillar Work Tools, Inc Dba Caterpillar · NSN 5331-01-289-3128 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-289-3128 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-289-3128. Primary manufacturer part number: 70638.
Features
  • O-Ring — FSC 5331
  • 1 verified cross-reference
  • Primary manufacturer: Caterpillar Work Tools, Inc Dba Caterpillar
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-289-3128, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Caterpillar Work Tools, Inc Dba Caterpillar. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameO-Ring
FSC / FSG5331 — O-Ring (FSG 53)
ManufacturersCaterpillar Work Tools, Inc Dba Caterpillar (CAGE 89917)
Technical Specifications
ParameterValue
NSN5331-01-289-3128
Primary Part Number70638
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerCaterpillar Work Tools, Inc Dba Caterpillar
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5950-00-116-36135301X010 INTERCHANGEABLE
Transformer,power
Precision Electronics, Inc
1285-01-264-771370638 INTERCHANGEABLE
Conductivity Cell
Atlantic Metalcraft Co
3020-01-549-806970638 INTERCHANGEABLE
Gear,spur
Pulsafeeder Inc a Unit of Idex Div a Unit of Idex Inc
Cross-Reference Index
Part NumberManufacturer
70638 Caterpillar Work Tools, Inc Dba Caterpillar (USA)
Related Parts
5950-00-116-3613INTERCHANGEABLE
TRANSFORMER,POWER
5301X010
1285-01-264-7713INTERCHANGEABLE
CONDUCTIVITY CELL
70638
3020-01-549-8069INTERCHANGEABLE
GEAR,SPUR
70638

Frequently Asked Questions

What is NSN 5331-01-289-3128?

NSN 5331-01-289-3128 is a O-Ring, manufactured by Caterpillar Work Tools, Inc Dba Caterpillar, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-289-3128?

NSN 5331-01-289-3128 has 1 cross-referenced part number: 70638 (Caterpillar Work Tools, Inc Dba Caterpillar).

What NSN replaces 5331-01-289-3128?

There are 3 known substitutes for 5331-01-289-3128: 5950-00-116-3613, 1285-01-264-7713, 3020-01-549-8069. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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