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1999978 — HORN,SIGNAL

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

1999978: HORN,SIGNAL.

The HORN,SIGNAL is a the manufacturer industrial component. Key specifications include material: STEEL HOUSING, hole_diameter: 0.203 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN, overall_width: 5.000 INCHES NOMINAL IN, terminal_type: STUD, overall_height: 7.000 INCHES NOMINAL IN, overall_length: 2.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 6350-00-833-3368, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
1999978
NSN: 6350-00-833-3368
FSC: 6350 — Miscellaneous Alarm, Signal, and Security Detection Systems
CAGE: 1LW55 — BORGWARNER PDS (ANDERSON), L.L.C. (USA)
SPECIFICATIONS
materialSTEEL HOUSING
hole_diameter0.203 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
overall_width5.000 INCHES NOMINAL IN
terminal_typeSTUD
overall_height7.000 INCHES NOMINAL IN
overall_length2.250 INCHES NOMINAL IN
mounting_bracketPROVIDED
terminal_quantity2
sound_projector_typeGRILL
sound_projector_quantity1
mounting_hole/stud_quantity2
terminal_thread_size_and_series/type_designator8-32 UNIFIED NATIONAL COARSE (UNC)
NSN6350-00-833-3368
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available HORN,SIGNAL TITLE COMPONENT PN 1999978 MFR HORN,SIGNAL
KEY FEATURES
•
MOUNTING HOLE/STUD QUANTITY: 2
•
TERMINAL QUANTITY: 2
•
TERMINAL TYPE: STUD
•
SOUND PROJECTOR QUANTITY: 1
•
SOUND PROJECTOR TYPE: GRILL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT7.000 INCHES NOMINAL IN
MOUNTING HOLE/STUD QUANTITY2
TERMINAL QUANTITY2
TERMINAL TYPESTUD
SOUND PROJECTOR QUANTITY1
SOUND PROJECTOR TYPEGRILL
OVERALL LENGTH2.250 INCHES NOMINAL IN
OVERALL WIDTH5.000 INCHES NOMINAL IN
MOUNTING BRACKETPROVIDED
TERMINAL THREAD SIZE AND SERIES/TYPE DESIGNATOR8-32 UNIFIED NATIONAL COARSE (UNC)
OTHER ITEMS IN FSC 6350 — Miscellaneous Alarm, Signal, and Security Detection Systems
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6350-00-001-4574 6350-00-001-9397 6350-00-003-0260 6350-00-003-1192 6350-00-003-1504 6350-00-003-1505 6350-00-003-1506 6350-00-003-3323
SUBSTITUTES & CROSS-REFERENCES 1
8333368Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1999978?
1999978 is a HORN,SIGNAL.
What parts can replace 1999978?
There is 1 known substitute for 1999978: 8333368. Substitute compatibility should be verified for your specific system.
What is the NSN for 1999978?
1999978 is cataloged in the U.S. Government catalog under NSN 6350-00-833-3368. This indicates validated use in U.S. government and defense supply chains.
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U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.