PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

65A81D947Cover,gearbox

Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier · NSN 2520-00-340-2120 · FSC 2520 · No Item Name Available
Verified by PartsTable
NSN 2520-00-340-2120 — this item is cataloged by the U.S. Government under National Stock Number 2520-00-340-2120. Primary manufacturer part number: 65A81D947.
Features
  • Cover,gearbox — FSC 2520
  • General Characteristics Item Description: 4 MTG HOLES 0.406 IN. DIA EQUALLY SPACED ON 3.500 IN. BOLT CIRCLE,4.125 IN. OD,RAISED PROJECTION BOTH ENDS 0.250 IN. H,0.250 IN. FLANGE THK IN
  • 4 verified cross-references
  • Primary manufacturer: Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Cover,gearbox, cataloged under National Stock Number 2520-00-340-2120, is classified within Federal Supply Class 2520 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, 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
NSN2520-00-340-2120
Primary Part Number65A81D947
Item NameCover,gearbox
FSC / FSG2520 / 25 — No Item Name Available
ManufacturerNaval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
StatusACTIVE
General Characteristics Item Description4 MTG HOLES 0.406 IN. DIA EQUALLY SPACED ON 3.500 IN. BOLT CIRCLE,4.125 IN. OD,RAISED PROJECTION BOTH ENDS 0.250 IN. H,0.250 IN. FLANGE THK IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
2915-00-098-9010 INTERCHANGEABLE
Distributor,engine
4720-00-145-6212P10-5535 INTERCHANGEABLE
Hose,preformed
Donaldson Company, Inc.
5915-00-519-448830707 INTERCHANGEABLE
Filter,radio Frequency Interfere
Raytheon Company Dba Raytheon
6680-00-530-0487403-04 INTERCHANGEABLE
Indicator,sight,liquid
Ernst, John C & Co, Inc.
9540-00-540-594110133-0701 INTERCHANGEABLE
Angle,structural
Transtar Metals Corp
5950-00-702-66258912002 INTERCHANGEABLE
Transformer,power
Air Force Lifecycle Management Center Electronic Components (aflcmc/ezss)
5945-00-929-481140304 INTERCHANGEABLE
Relay,electromagnetic
Silver King Refrigeration Inc.
5330-00-965-6951658320 INTERCHANGEABLE
Gasket
Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division
5995-01-083-6567 INTERCHANGEABLE
Cable Assembly,special Purpose,e
5133-01-095-6713 INTERCHANGEABLE
Drill,twist
Cross-Reference Index
Part NumberManufacturer
02261-0280-11 Asrc Federal Facilities Logistics, Llc (USA)
02261-0280-11 Harsco Corp Bmy-Combat Systems Div (USA)
65A81D947 PRIMARY Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA)
40304 Western Mfg Co (USA)
Related Parts
2915-00-098-9010INTERCHANGEABLE
DISTRIBUTOR,ENGINE
4720-00-145-6212INTERCHANGEABLE
HOSE,PREFORMED
P10-5535
5915-00-519-4488INTERCHANGEABLE
FILTER,RADIO FREQUENCY INTERFERE
30707
6680-00-530-0487INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
403-04
9540-00-540-5941INTERCHANGEABLE
ANGLE,STRUCTURAL
10133-0701
5950-00-702-6625INTERCHANGEABLE
TRANSFORMER,POWER
8912002
5945-00-929-4811INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
40304
5330-00-965-6951INTERCHANGEABLE
GASKET
658320
5995-01-083-6567INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
5133-01-095-6713INTERCHANGEABLE
DRILL,TWIST
5340-01-235-9795INTERCHANGEABLE
HANDWHEEL
40304
5975-01-282-5484INTERCHANGEABLE
BUSHING,STRAIN RELIEF,CABLE
4030400

Frequently Asked Questions

What is NSN 2520-00-340-2120?

NSN 2520-00-340-2120 is a Cover,gearbox, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 2520 (No Item Name Available). Status: active.

What are the part numbers for NSN 2520-00-340-2120?

NSN 2520-00-340-2120 has 4 cross-referenced part numbers: 02261-0280-11 (Asrc Federal Facilities Logistics, Llc), 02261-0280-11 (Harsco Corp Bmy-Combat Systems Div), 65A81D947 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 40304 (Western Mfg Co).

What NSN replaces 2520-00-340-2120?

There are 12 known substitutes for 2520-00-340-2120: 2915-00-098-9010, 4720-00-145-6212, 5915-00-519-4488 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 65A81D947?

Key specifications for 65A81D947: General Characteristics Item Description: 4 MTG HOLES 0.406 IN. DIA EQUALLY SPACED ON 3.500 IN. BOLT CIRCLE,4.125 IN. OD,RAISED PROJECTION BOTH ENDS 0.250 IN. H,0.250 IN. FLANGE THK IN. 1 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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