PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4961Housing,liquid Pump

Lear Siegler Inc Sherwood Div · NSN 4320-00-149-2255 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-149-2255 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-149-2255. Primary manufacturer part number: 4961.
Features
  • Housing,liquid Pump — FSC 4320
  • Pump Design Control Activity: 54641
  • Material: COPPER ALLOY
  • 1 verified cross-reference
  • Primary manufacturer: Lear Siegler Inc Sherwood Div
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
  • Applications requiring Copper Alloy construction
General Description

The Housing,liquid Pump, cataloged under National Stock Number 4320-00-149-2255, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Lear Siegler Inc Sherwood Div. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-149-2255
Primary Part Number4961
Item NameHousing,liquid Pump
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerLear Siegler Inc Sherwood Div
StatusACTIVE
Pump Design Control Activity54641
MaterialCOPPER ALLOY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4730-00-090-925214115204 INTERCHANGEABLE
Coupling,pipe
Danfoss Power Solutions II, Llc
6625-00-243-06078197300 INTERCHANGEABLE
Meter,electrical Frequency
Us Army Aviation and Missile Command
5905-00-258-249425960-4-80 INTERCHANGEABLE
Resistor,fixed,wire Wound
Ward Leonard Ct Llc
4730-00-289-23705H4778 INTERCHANGEABLE
Elbow,pipe
Caterpillar Inc Div Caterpillar Defense
4030-00-291-3795 INTERCHANGEABLE
Clamp,wire Rope,bolted
2920-00-752-69514961 INTERCHANGEABLE
Sleeve,ignition Terminal
Champion Aerospace Llc
5930-00-890-95134961 INTERCHANGEABLE
Switch,toggle
Westinghouse Electric Corp
5120-01-073-5187GS15927-1 INTERCHANGEABLE
Expander,seal
Hamilton Sundstrand Corporation Dba Collins Aerospace
6625-01-101-1766Y8134 INTERCHANGEABLE
Lead Set,test
Fluke Corp
6110-01-150-4091 INTERCHANGEABLE
Panel,power Distribution
Cross-Reference Index
Part NumberManufacturer
4961 Lear Siegler Inc Sherwood Div (USA)
Related Parts
4730-00-090-9252INTERCHANGEABLE
COUPLING,PIPE
14115204
6625-00-243-0607INTERCHANGEABLE
METER,ELECTRICAL FREQUENCY
8197300
5905-00-258-2494INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
25960-4-80
4730-00-289-2370INTERCHANGEABLE
ELBOW,PIPE
5H4778
4030-00-291-3795INTERCHANGEABLE
CLAMP,WIRE ROPE,BOLTED
2920-00-752-6951INTERCHANGEABLE
SLEEVE,IGNITION TERMINAL
4961
5930-00-890-9513INTERCHANGEABLE
SWITCH,TOGGLE
4961
5120-01-073-5187INTERCHANGEABLE
EXPANDER,SEAL
GS15927-1
6625-01-101-1766INTERCHANGEABLE
LEAD SET,TEST
Y8134
6110-01-150-4091INTERCHANGEABLE
PANEL,POWER DISTRIBUTION
5120-01-290-9548INTERCHANGEABLE
KEY SET,SOCKET HEAD SCREW
J4961
5330-01-292-7160INTERCHANGEABLE
GASKET
N257129

Frequently Asked Questions

What is NSN 4320-00-149-2255?

NSN 4320-00-149-2255 is a Housing,liquid Pump, manufactured by Lear Siegler Inc Sherwood Div, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-149-2255?

NSN 4320-00-149-2255 has 1 cross-referenced part number: 4961 (Lear Siegler Inc Sherwood Div).

What NSN replaces 4320-00-149-2255?

There are 12 known substitutes for 4320-00-149-2255: 4730-00-090-9252, 6625-00-243-0607, 5905-00-258-2494 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4961?

Key specifications for 4961: Pump Design Control Activity: 54641; Material: COPPER ALLOY; Special Features: FLANGED; O/A W 3.000 IN.; MAJOR FLANGE OD 8.625 IN.,W/SIX BOLT HOLES 0.438 IN. DIA ON A 7.875 IN. BOLT CIRCLE; MINOR FLANGE OD 5.562 IN.,W/SIX BOLT HOLES 0.562 IN. DIA ON A 4.500 IN. BOLT CIRCLE; BORE DIA 2.312 IN.; COUNTERBORE DIA 3.500 IN. IN. 3 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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