PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

14203O-Ring

Cat Pumps Corp · NSN 5331-01-377-4463 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-377-4463 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-377-4463. Primary manufacturer part number: 14203.
Features
  • O-Ring — FSC 5331
  • 1 verified cross-reference
  • Primary manufacturer: Cat Pumps Corp
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-377-4463, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Cat Pumps Corp. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameO-Ring
FSC / FSG5331 — O-Ring (FSG 53)
ManufacturersCat Pumps Corp (CAGE 57783)
Technical Specifications
ParameterValue
NSN5331-01-377-4463
Primary Part Number14203
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerCat Pumps Corp
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5945-00-918-537214203 INTERCHANGEABLE
Contact Finger
Kone Inc.
5331-01-282-950814203 INTERCHANGEABLE
O-Ring
Elkay Mfg Co Water Cooler Div
3020-01-475-071614203M-442-000 INTERCHANGEABLE
Gear,worm
Curtiss-Wright Flow Control Corporation Dba Curtiss-Wright Flow Control Co Div Curtiss-Wright / Nu-Torque
6515-01-596-511014203 INTERCHANGEABLE
Faceplate,ostomy Bag
Hollister Inc
5305-01-625-998714203 INTERCHANGEABLE
Screw,cap,hexagon Head
Fastenal Company Dba Fastenal Co
Cross-Reference Index
Part NumberManufacturer
14203 PRIMARY Cat Pumps Corp (USA)
Related Parts
5945-00-918-5372INTERCHANGEABLE
CONTACT FINGER
14203
5331-01-282-9508INTERCHANGEABLE
O-RING
14203
3020-01-475-0716INTERCHANGEABLE
GEAR,WORM
14203M-442-000
6515-01-596-5110INTERCHANGEABLE
FACEPLATE,OSTOMY BAG
14203
5305-01-625-9987INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
14203

Frequently Asked Questions

What is NSN 5331-01-377-4463?

NSN 5331-01-377-4463 is a O-Ring, manufactured by Cat Pumps Corp, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-377-4463?

NSN 5331-01-377-4463 has 1 cross-referenced part number: 14203 (Cat Pumps Corp).

What NSN replaces 5331-01-377-4463?

There are 5 known substitutes for 5331-01-377-4463: 5945-00-918-5372, 5331-01-282-9508, 3020-01-475-0716 and 2 more. Verify interchangeability with system specifications before substitution.

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