PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B81Compass,magnetic,mounted

Ritchie E S and Sons Inc · NSN 6605-01-661-1301 · FSC 6605 · No Item Name Available
Verified by PartsTable
NSN 6605-01-661-1301 — this item is cataloged by the U.S. Government under National Stock Number 6605-01-661-1301. Primary manufacturer part number: B81.
Features
  • Compass,magnetic,mounted — FSC 6605
  • Illuminated Feature: INCLUDED
  • Dial Finish: PHOSPHORESCENT
  • Design Type: TOP READING
  • Compensating Feature: INCLUDED
  • Mounting Method: BRACKET(S)
  • 1 verified cross-reference
  • Primary manufacturer: Ritchie E S and Sons Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Compass,magnetic,mounted, cataloged under National Stock Number 6605-01-661-1301, is classified within Federal Supply Class 6605 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Ritchie E S and Sons Inc. Government technical data includes 5 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6605-01-661-1301
Primary Part NumberB81
Item NameCompass,magnetic,mounted
FSC / FSG6605 / 66 — No Item Name Available
ManufacturerRitchie E S and Sons Inc
StatusACTIVE
Illuminated FeatureINCLUDED
Dial FinishPHOSPHORESCENT
Design TypeTOP READING
Compensating FeatureINCLUDED
Mounting MethodBRACKET(S)
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5365-00-060-42351650407-31 INTERCHANGEABLE
Shim
Lockheed Martin Corporation Div Rms - Mitchel Field
3030-00-529-0474 INTERCHANGEABLE
Belt,v
3460-01-185-7360A60-M5VBE 8X1X3/4HOLE INTERCHANGEABLE
Wheel,abrasive
Saint-Gobain Abrasives Inc
3030-01-267-8093B81 INTERCHANGEABLE
Belt,v
Gates Corporation
5210-01-584-5163 INTERCHANGEABLE
Indicator,dial
Cross-Reference Index
Part NumberManufacturer
B81 PRIMARY Ritchie E S and Sons Inc (USA)
Related Parts
5365-00-060-4235INTERCHANGEABLE
SHIM
1650407-31
3030-00-529-0474INTERCHANGEABLE
BELT,V
3460-01-185-7360INTERCHANGEABLE
WHEEL,ABRASIVE
A60-M5VBE 8X1X3/4HOLE
3030-01-267-8093INTERCHANGEABLE
BELT,V
B81
5210-01-584-5163INTERCHANGEABLE
INDICATOR,DIAL

Frequently Asked Questions

What is NSN 6605-01-661-1301?

NSN 6605-01-661-1301 is a Compass,magnetic,mounted, manufactured by Ritchie E S and Sons Inc, classified under FSC 6605 (No Item Name Available). Status: active.

What are the part numbers for NSN 6605-01-661-1301?

NSN 6605-01-661-1301 has 1 cross-referenced part number: B81 (Ritchie E S and Sons Inc).

What NSN replaces 6605-01-661-1301?

There are 5 known substitutes for 6605-01-661-1301: 5365-00-060-4235, 3030-00-529-0474, 3460-01-185-7360 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B81?

Key specifications for B81: Overall Length: 125.0 MILLIMETERS NOMINAL MM; Special Features: CAGE 50967 RITCHIE E S AND SONS INC OEM,MOVABLE SUN SHIELD; Illuminated Feature: INCLUDED; Dial Finish: PHOSPHORESCENT. 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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