PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6639Guide,pump

Coffin Turbo Pump Inc · NSN 4320-01-274-7991 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-01-274-7991 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-274-7991. Primary manufacturer part number: 6639.
Features
  • Guide,pump — FSC 4320
  • 2 verified cross-references
  • Primary manufacturer: Coffin Turbo Pump Inc
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
General Description

The Guide,pump, cataloged under National Stock Number 4320-01-274-7991, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Coffin Turbo Pump Inc. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameGuide,pump
FSC / FSG4320 — No Item Name Available (FSG 43)
ManufacturersFmc Corp Turbo Pump Operation (CAGE 13380); Coffin Turbo Pump Inc (CAGE 0APJ5)
Technical Specifications
ParameterValue
NSN4320-01-274-7991
Primary Part Number6639
Item NameGuide,pump
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerCoffin Turbo Pump Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
1660-00-017-34216639 INTERCHANGEABLE
Lining,gear Brake
Axillon Aerospace (baltimore) Inc.
5940-00-258-1832TM146 INTERCHANGEABLE
Post,binding,electrical
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5960-00-295-3589 INTERCHANGEABLE
Electron Tube
5340-00-532-92313B1084 INTERCHANGEABLE
Clamp,loop
Napco International Llc Dba Napco International Inc
5331-01-019-2448MS28775-249 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
6110-01-418-25746639-G501 INTERCHANGEABLE
Panel,power Distribution
Howell Laboratories Inc Dba Howell Laboratories Inc
5136-01-431-19959739 INTERCHANGEABLE
Die,thread Cutting
Stanley Tools Div of Stanley Works
6530-01-561-4576CA571204 INTERCHANGEABLE
Glove,edema,occupational Therapy
Sammons Preston Dba Sammons Preston Rolyan
5136-01-652-03936639 INTERCHANGEABLE
Die,thread Cutting
Stanley Tools Div of Stanley Works
Cross-Reference Index
Part NumberManufacturer
6639 Fmc Corp Turbo Pump Operation (USA)
6639 PRIMARY Coffin Turbo Pump Inc (USA)
Related Parts
1660-00-017-3421INTERCHANGEABLE
LINING,GEAR BRAKE
6639
5940-00-258-1832INTERCHANGEABLE
POST,BINDING,ELECTRICAL
TM146
5960-00-295-3589INTERCHANGEABLE
ELECTRON TUBE
5340-00-532-9231INTERCHANGEABLE
CLAMP,LOOP
3B1084
5331-01-019-2448INTERCHANGEABLE
O-RING
MS28775-249
6110-01-418-2574INTERCHANGEABLE
PANEL,POWER DISTRIBUTION
6639-G501
5136-01-431-1995INTERCHANGEABLE
DIE,THREAD CUTTING
9739
6530-01-561-4576INTERCHANGEABLE
GLOVE,EDEMA,OCCUPATIONAL THERAPY
CA571204
5136-01-652-0393INTERCHANGEABLE
DIE,THREAD CUTTING
6639

Frequently Asked Questions

What is NSN 4320-01-274-7991?

NSN 4320-01-274-7991 is a Guide,pump, manufactured by Coffin Turbo Pump Inc, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-01-274-7991?

NSN 4320-01-274-7991 has 2 cross-referenced part numbers: 6639 (Fmc Corp Turbo Pump Operation), 6639 (Coffin Turbo Pump Inc).

What NSN replaces 4320-01-274-7991?

There are 9 known substitutes for 4320-01-274-7991: 1660-00-017-3421, 5940-00-258-1832, 5960-00-295-3589 and 6 more. Verify interchangeability with system specifications before substitution.

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