PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C399-3Compass,magnetic,mounted

Lockheed Martin Corporation Dba Lockheed Martin Rotary and Mission Systems Div Rms- C6isr · NSN 6605-01-360-3846 · FSC 6605 · No Item Name Available
Verified by PartsTable
NSN 6605-01-360-3846 — this item is cataloged by the U.S. Government under National Stock Number 6605-01-360-3846. Primary manufacturer part number: C399-3.
Features
  • Compass,magnetic,mounted — FSC 6605
  • Card Size: 3.750 INCHES IN
  • Bowl Element Type: CARD
  • Instrument Type: WET
  • Compensating Feature: INCLUDED
  • Smallest Increment in Deg: 5.0 CARD
  • Bowl Shape: SPHERICAL
  • Mounting Method: FLANGE
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Compass,magnetic,mounted, cataloged under National Stock Number 6605-01-360-3846, is classified within Federal Supply Class 6605 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Lockheed Martin Corporation Dba Lockheed Martin Rotary and Mission Systems Div Rms- C6isr. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6605-01-360-3846
Primary Part NumberC399-3
Item NameCompass,magnetic,mounted
FSC / FSG6605 / 66 — No Item Name Available
ManufacturerLockheed Martin Corporation Dba Lockheed Martin Rotary and Mission Systems Div Rms- C6isr
StatusACTIVE
Card Size3.750 INCHES IN
Bowl Element TypeCARD
Instrument TypeWET
Compensating FeatureINCLUDED
Smallest Increment in Deg5.0 CARD
Bowl ShapeSPHERICAL
Mounting MethodFLANGE
Design TypeTOP READING
Illuminated LocationOVER
Illuminated FeatureINCLUDED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
3110-00-191-0502MS19065-29 INTERCHANGEABLE
Roller,bearing
American Society for Testing and Materials Dba Astm International
3455-00-194-051710140 INTERCHANGEABLE
Cutter,milling,plain
Niagara Cutter Inc
5940-00-844-3111 INTERCHANGEABLE
Terminal,lug
3030-01-167-441478-287 INTERCHANGEABLE
Belt,v
Thermo King Corporation Dba Phoenix Global Distirbution.
6810-01-181-2358 INTERCHANGEABLE
Hydrochloric Acid
5120-01-576-3402A144A INTERCHANGEABLE
Holder,flywheel
Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
Cross-Reference Index
Part NumberManufacturer
C399-3 Textron Canada Ltdbell Aerospacecanada Textron Div (CAN)
C399-3 PRIMARY Lockheed Martin Corporation Dba Lockheed Martin Rotary and Mission Systems Div Rms- C6isr (USA)
C399-3 Simplex Supply Co. Inc (USA)
A144 Itt Rule Industries Inc Danforth Div (USA)
A144 Paxton Co (USA)
Related Parts
3110-00-191-0502INTERCHANGEABLE
ROLLER,BEARING
MS19065-29
3455-00-194-0517INTERCHANGEABLE
CUTTER,MILLING,PLAIN
10140
5940-00-844-3111INTERCHANGEABLE
TERMINAL,LUG
3030-01-167-4414INTERCHANGEABLE
BELT,V
78-287
6810-01-181-2358INTERCHANGEABLE
HYDROCHLORIC ACID
5120-01-576-3402INTERCHANGEABLE
HOLDER,FLYWHEEL
A144A

Frequently Asked Questions

What is NSN 6605-01-360-3846?

NSN 6605-01-360-3846 is a Compass,magnetic,mounted, manufactured by Lockheed Martin Corporation Dba Lockheed Martin Rotary and Mission Systems Div Rms- C6isr, classified under FSC 6605 (No Item Name Available). Status: active.

What are the part numbers for NSN 6605-01-360-3846?

NSN 6605-01-360-3846 has 5 cross-referenced part numbers: C399-3 (Textron Canada Ltdbell Aerospacecanada Textron Div), C399-3 (Lockheed Martin Corporation Dba Lockheed Martin Rotary and Mission Systems Div Rms- C6isr), C399-3 (Simplex Supply Co. Inc), A144 (Itt Rule Industries Inc Danforth Div), A144 (Paxton Co).

What NSN replaces 6605-01-360-3846?

There are 6 known substitutes for 6605-01-360-3846: 3110-00-191-0502, 3455-00-194-0517, 5940-00-844-3111 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of C399-3?

Key specifications for C399-3: Card Size: 3.750 INCHES IN; Bowl Element Type: CARD; Instrument Type: WET; Compensating Feature: INCLUDED. 10 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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