NSN 4140-01-558-1862 · NIIN 015581862 · Part number 504503
W R Systems Ltd Dba Alert · FSC 4140 — Fans, Air Circulators, and Blower Equipment · FSG 41 — Refrigeration, AC, and Air Circulating Equipment · CAGE 1BCK1
Government record, cited
NSN 4140-01-558-1862 — this item is cataloged by the U.S. Government under National Stock Number 4140-01-558-1862. Manufacturer of record part number: 504503.
Also searched as4140-01-558-1862 ·
4140015581862 ·
NIIN 015581862 ·
01-558-1862 ·
FSC 4140 Fans, Air Circulators, and Blower Equipment · CAGE 1BCK1 · 504503
Special Test Features: ASSEMBLY CONSISTS OF: P/N FP-301, SLEEVING, HEAT SHRINK, .250" DIAMETER, BLACK (QUANTITY: AS REQUIRED);SLEEVING, HEAT SHRINKABLE, .25" DIAMETER, WHITE, P/N 2470021 (QUANTITY: AS REQUIRED);SOLDER PER SPEC QQ-S-571, P/N SN60WRP2 (QUANTITY: AS REQUIRED);CABLE, ELECTRONIC, 22 AWG, ORG, P/N 83049-003100 (QUANTITY: AS REQUIRED);CABLE, ELECTRONIC, 22 AWG, BLACK, P/N 83049-0010100 (QUANTITY: AS REQUIRED);TERMINALS, CRIMP, P/N 640252-1 (QUANTITY: 3);CONNECTOR, ELECTIRCAL, 3-PIN LATCH, P/N 770849-3 (QUANTITY: 1);FAN, COOLING, P/N 504500, P/N 29355 (QUANTITY: 2)
Style Designator: FIXED, MULTI-UNIT
Identification
NSN: 4140-01-558-1862
NIIN: 015581862
FSC: 4140 — Fans, Air Circulators, and Blower Equipment
FSG: 41 — Refrigeration, AC, and Air Circulating Equipment
Primary part number: 504503
Manufacturer: W R Systems Ltd Dba Alert
General Description
The Fan,ventilating, cataloged under National Stock Number 4140-01-558-1862, is classified within Federal Supply Class 4140 (Fans, Air Circulators, and Blower Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is W R Systems Ltd Dba Alert. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4140-01-558-1862
Primary Part Number
504503
Item Name
Fan,ventilating
FSC / FSG
4140 / 41 — Fans, Air Circulators, and Blower Equipment
Manufacturer
W R Systems Ltd Dba Alert
Status
ACTIVE
Mounting Facility Type and Quantity
8 FLANGE
Inclosure Type
OPEN
Voltage in Volts and Current Type
24.0 DC
Flow Direction
REVERSIBLE
Drive Type
DIRECT
Special Test Features
ASSEMBLY CONSISTS OF: P/N FP-301, SLEEVING, HEAT SHRINK, .250" DIAMETER, BLACK (QUANTITY: AS REQUIRED);SLEEVING, HEAT SHRINKABLE, .25" DIAMETER, WHITE, P/N 2470021 (QUANTITY: AS REQUIRED);SOLDER PER SPEC QQ-S-571, P/N SN60WRP2 (QUANTITY: AS REQUIRED);CABLE, ELECTRONIC, 22 AWG, ORG, P/N 83049-003100 (QUANTITY: AS REQUIRED);CABLE, ELECTRONIC, 22 AWG, BLACK, P/N 83049-0010100 (QUANTITY: AS REQUIRED);TERMINALS, CRIMP, P/N 640252-1 (QUANTITY: 3);CONNECTOR, ELECTIRCAL, 3-PIN LATCH, P/N 770849-3 (QUANTITY: 1);FAN, COOLING, P/N 504500, P/N 29355 (QUANTITY: 2)
Navy, United States Department of the Dba Space & Naval Warfare Systems Center, Atlantic (USA)
No interchangeability data on file.
Other items in FSC 4140 — Fans, Air Circulators, and Blower Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4140-00-000-0082
IMPELLER,FAN,AXIAL
4140-00-001-1517
FAN,CENTRIFUGAL
4140-00-001-1536
FAN,VENTILATING
4140-00-001-1537
4140-00-001-1537 · Item name not on file
4140-00-001-3930
4140-00-001-3930 · Item name not on file
4140-00-001-6464
4140-00-001-6464 · Item name not on file
4140-00-001-6874
4140-00-001-6874 · Item name not on file
4140-00-001-6875
4140-00-001-6875 · Item name not on file
Frequently Asked Questions
What is NSN 4140-01-558-1862?
NSN 4140-01-558-1862 is a Fan,ventilating, manufactured by W R Systems Ltd Dba Alert, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
What part numbers are listed for NSN 4140-01-558-1862?
NSN 4140-01-558-1862 has 2 manufacturer part numbers on file: 504503 (W R Systems Ltd Dba Alert), 504503 (Navy, United States Department of the Dba Space & Naval Warfare Systems Center, Atlantic).
What are the specifications of 504503?
Key specifications for 504503: Mounting Facility Type and Quantity: 8 FLANGE; Inclosure Type: OPEN; Voltage in Volts and Current Type: 24.0 DC; Flow Direction: REVERSIBLE. 10 specifications are documented in the U.S. Government catalog.
Is NSN 4140-01-558-1862 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.