PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21-112-04Seal,plain

Flowserve Pump Corporation Div Fluid Sealing Division · NSN 5330-01-320-3434 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-01-320-3434 — this item is cataloged by the U.S. Government under National Stock Number 5330-01-320-3434. Primary manufacturer part number: 21-112-04.
Features
  • Seal,plain — FSC 5330
  • 2 verified cross-references
  • Primary manufacturer: Flowserve Pump Corporation Div Fluid Sealing Division
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The Seal,plain, cataloged under National Stock Number 5330-01-320-3434, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Flowserve Pump Corporation Div Fluid Sealing Division. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameSeal,plain
FSC / FSG5330 — No Item Name Available (FSG 53)
ManufacturersFlowserve Pump Corporation Div Fluid Sealing Division (CAGE 67209); Buffaloes Fire Pump Inc. Dba R B Pump Co (CAGE 62503)
Technical Specifications
ParameterValue
NSN5330-01-320-3434
Primary Part Number21-112-04
Item NameSeal,plain
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerFlowserve Pump Corporation Div Fluid Sealing Division
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5330-01-325-1220T21 INTERCHANGEABLE
Pump Seal Assembly
Buffaloes Fire Pump Inc. Dba R B Pump Co
Cross-Reference Index
Part NumberManufacturer
21-112-04 PRIMARY Flowserve Pump Corporation Div Fluid Sealing Division (USA)
D-4020A-65-1157 Buffaloes Fire Pump Inc. Dba R B Pump Co (USA)
Related Parts
5330-01-325-1220INTERCHANGEABLE
PUMP SEAL ASSEMBLY
T21

Frequently Asked Questions

What is NSN 5330-01-320-3434?

NSN 5330-01-320-3434 is a Seal,plain, manufactured by Flowserve Pump Corporation Div Fluid Sealing Division, classified under FSC 5330 (No Item Name Available). Status: active.

What are the part numbers for NSN 5330-01-320-3434?

NSN 5330-01-320-3434 has 2 cross-referenced part numbers: 21-112-04 (Flowserve Pump Corporation Div Fluid Sealing Division), D-4020A-65-1157 (Buffaloes Fire Pump Inc. Dba R B Pump Co).

What NSN replaces 5330-01-320-3434?

There is 1 known substitute for 5330-01-320-3434: 5330-01-325-1220. Verify interchangeability with system specifications before substitution.

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