PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4903Vacuum Pump,reciprocating

Atacs Products, Inc · NSN 4310-01-439-1250 · FSC 4310 · No Item Name Available
Verified by PartsTable
NSN 4310-01-439-1250 — this item is cataloged by the U.S. Government under National Stock Number 4310-01-439-1250. Primary manufacturer part number: 4903.
Features
  • Vacuum Pump,reciprocating — FSC 4310
  • 1 verified cross-reference
  • Primary manufacturer: Atacs Products, Inc
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
General Description

The Vacuum Pump,reciprocating, cataloged under National Stock Number 4310-01-439-1250, is classified within Federal Supply Class 4310 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Atacs Products, Inc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4310-01-439-1250
Primary Part Number4903
Item NameVacuum Pump,reciprocating
FSC / FSG4310 / 43 — No Item Name Available
ManufacturerAtacs Products, Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5340-00-084-34564003 INTERCHANGEABLE
Clamp,loop
Agc Acquisition Llc Div Agc Acquisiton Llc
3455-00-222-379051-10571 INTERCHANGEABLE
Cutter,milling,end
Union Butterfield Corp P O Box 9000 Crystal Lake Il 60039
6625-00-239-42424903-2 INTERCHANGEABLE
Meter,arbitrary Scale
Beede Electrical Instrument Co. Inc.
3030-00-649-9445490-3 INTERCHANGEABLE
Belts,v,matched Set
Gates Corporation
6625-00-669-07742902-01-00018 INTERCHANGEABLE
Meter,s-Units
Pax Mfg Corp Hammarlund Mfg Co Div
2540-00-700-50292199490 INTERCHANGEABLE
Shaft Asy
General Motors Corp
5905-00-930-056573096 INTERCHANGEABLE
Resistor,fixed,wire Wound,induct
Electro Scientific Industries Inc
5220-01-075-1648GS15966-1 INTERCHANGEABLE
Gage
Hamilton Sundstrand Corporation Dba Collins Aerospace
5999-01-189-52634903 INTERCHANGEABLE
Heat Sink,electrical-Electronic
Carlisle & Finch Co
5950-01-251-43054950309 INTERCHANGEABLE
Transformer,audio Frequency
Palomar Products, Inc.
Cross-Reference Index
Part NumberManufacturer
4903 Atacs Products, Inc (USA)
Related Parts
5340-00-084-3456INTERCHANGEABLE
CLAMP,LOOP
4003
3455-00-222-3790INTERCHANGEABLE
CUTTER,MILLING,END
51-10571
6625-00-239-4242INTERCHANGEABLE
METER,ARBITRARY SCALE
4903-2
3030-00-649-9445INTERCHANGEABLE
BELTS,V,MATCHED SET
490-3
6625-00-669-0774INTERCHANGEABLE
METER,S-UNITS
2902-01-00018
2540-00-700-5029INTERCHANGEABLE
SHAFT ASY
2199490
5905-00-930-0565INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND,INDUCT
73096
5220-01-075-1648INTERCHANGEABLE
GAGE
GS15966-1
5999-01-189-5263INTERCHANGEABLE
HEAT SINK,ELECTRICAL-ELECTRONIC
4903
5950-01-251-4305INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
4950309
6530-01-556-9168INTERCHANGEABLE
TRAY,ARMREST,LOUNGE CHAIR,BLOOD
20614-800

Frequently Asked Questions

What is NSN 4310-01-439-1250?

NSN 4310-01-439-1250 is a Vacuum Pump,reciprocating, manufactured by Atacs Products, Inc, classified under FSC 4310 (No Item Name Available). Status: active.

What are the part numbers for NSN 4310-01-439-1250?

NSN 4310-01-439-1250 has 1 cross-referenced part number: 4903 (Atacs Products, Inc).

What NSN replaces 4310-01-439-1250?

There are 11 known substitutes for 4310-01-439-1250: 5340-00-084-3456, 3455-00-222-3790, 6625-00-239-4242 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4903?

Key specifications for 4903: Overall Height: 5.500 INCHES NOMINAL IN; Special Features: 85 PSI INPUT, 0-160 PSI PRESSURE GAUGE,PLUMBED WITH AIR REGULATOR,1/4INAIR IN,VACUUM OUT QUICK DISCONNECT; Overall Width: 5.500 INCHES NOMINAL IN; Overall Length: 6.000 INCHES NOMINAL IN. 4 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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