PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2870Gear Cluster

Del Mar Avionics, Llc · NSN 3020-00-674-1751 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-674-1751 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-674-1751. Primary manufacturer part number: 2870.
Features
  • Gear Cluster — FSC 3020
  • Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM OVERALL
  • Bore Nominal Depth: 1.005 INCHES BOTH ENDS IN
  • Nominal Overall Length: 1.005 INCHES IN
  • Nominal Outside Diameter: 1.897 INCHES FIRST GEAR IN
  • Hub Nominal Length: 0.130 INCHES BETWEEN FIRST AND SECOND GEAR IN
  • Bore Nominal Diameter: 0.495 INCHES BOTH ENDS IN
  • Material: STEEL COMP 1117 OVERALL
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Steel Comp 1117 Overall construction
General Description

The Gear Cluster, cataloged under National Stock Number 3020-00-674-1751, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Del Mar Avionics, Llc. Government technical data includes 14 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-00-674-1751
Primary Part Number2870
Item NameGear Cluster
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerDel Mar Avionics, Llc
StatusACTIVE
Hardness Rating40.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM OVERALL
Bore Nominal Depth1.005 INCHES BOTH ENDS IN
Nominal Overall Length1.005 INCHES IN
Nominal Outside Diameter1.897 INCHES FIRST GEAR IN
Hub Nominal Length0.130 INCHES BETWEEN FIRST AND SECOND GEAR IN
Bore Nominal Diameter0.495 INCHES BOTH ENDS IN
MaterialSTEEL COMP 1117 OVERALL
ConstructionSOLID
Nominal Outside Diameter0.997 INCHES SECOND GEAR IN
Material Document and ClassificationQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Bore StylePLAIN BOTH ENDS
Hub Nominal Diameter0.730 INCHES BETWEEN FIRST AND SECOND GEAR IN
Design TypeSPUR FIRST GEAR
Design TypeSPUR SECOND GEAR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3030-00-086-1614 INTERCHANGEABLE
Belt,v
3110-00-100-6170MS19059-2430 INTERCHANGEABLE
Ball,bearing
American Society for Testing and Materials Dba Astm International
5905-00-437-0958B5J100 INTERCHANGEABLE
Resistor,fixed,wire Wound,induct
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
3110-00-470-8124GR56RSSMI46 INTERCHANGEABLE
Bearing,roller,needle
Mcgill Manufacturing Co, Inc
6210-00-548-0657 INTERCHANGEABLE
Light,panel
2915-00-590-77982870 INTERCHANGEABLE
Shield,spring
Eaton Corporation Dba Airframe Div Fuel & Motion Control Systems
6230-00-591-2361815-1197116 INTERCHANGEABLE
Searchlight
Naval Ship Systems Command
5950-00-648-1563746105PT6 INTERCHANGEABLE
Transformer,radio Frequency
L3 Technologies, Inc. Div Communication Systems-East
4420-00-678-40112870 INTERCHANGEABLE
Cooler,fluid,industrial
R.w. Fernstrum & Company
4730-01-100-21312870 INTERCHANGEABLE
Coupling,pipe
George Fischer Sloane, Inc.
Cross-Reference Index
Part NumberManufacturer
2870 Del Mar Avionics, Llc (USA)
Related Parts
3030-00-086-1614INTERCHANGEABLE
BELT,V
3110-00-100-6170INTERCHANGEABLE
BALL,BEARING
MS19059-2430
5905-00-437-0958INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND,INDUCT
B5J100
3110-00-470-8124INTERCHANGEABLE
BEARING,ROLLER,NEEDLE
GR56RSSMI46
6210-00-548-0657INTERCHANGEABLE
LIGHT,PANEL
2915-00-590-7798INTERCHANGEABLE
SHIELD,SPRING
2870
6230-00-591-2361INTERCHANGEABLE
SEARCHLIGHT
815-1197116
5950-00-648-1563INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
746105PT6
4420-00-678-4011INTERCHANGEABLE
COOLER,FLUID,INDUSTRIAL
2870
4730-01-100-2131INTERCHANGEABLE
COUPLING,PIPE
2870
5998-01-458-0477INTERCHANGEABLE
EXTRACTOR,ELECTRICAL CARD
2870
5310-01-484-4774INTERCHANGEABLE
WASHER,FLAT
CC-0009886

Frequently Asked Questions

What is NSN 3020-00-674-1751?

NSN 3020-00-674-1751 is a Gear Cluster, manufactured by Del Mar Avionics, Llc, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-00-674-1751?

NSN 3020-00-674-1751 has 1 cross-referenced part number: 2870 (Del Mar Avionics, Llc).

What NSN replaces 3020-00-674-1751?

There are 12 known substitutes for 3020-00-674-1751: 3030-00-086-1614, 3110-00-100-6170, 5905-00-437-0958 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2870?

Key specifications for 2870: Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM OVERALL; Bore Nominal Depth: 1.005 INCHES BOTH ENDS IN; Nominal Overall Length: 1.005 INCHES IN; Nominal Outside Diameter: 1.897 INCHES FIRST GEAR IN. 14 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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