PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11581Gear,antibacklash,spur

Atlantic Inertial Systems Inc · NSN 3020-01-025-3129 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-01-025-3129 — this item is cataloged by the U.S. Government under National Stock Number 3020-01-025-3129. Primary manufacturer part number: 11581.
Features
  • Gear,antibacklash,spur — FSC 3020
  • Bore Style: PLAIN BOTH ENDS
  • Style Designator: PROTRUDING HUBS
  • Hub Style Designator: PLAIN SECOND END
  • Pressure Angle: 20.0000 DEGREES
  • Tooth Form: STANDARD
  • Attachment Method: INTERNAL RING GROOVE
  • Mounting Hole Type and Quantity: 1 THREADED TRANSVERSELY THROUGH HUB FIRST END
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
General Description

The Gear,antibacklash,spur, cataloged under National Stock Number 3020-01-025-3129, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Atlantic Inertial Systems Inc. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 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
NSN3020-01-025-3129
Primary Part Number11581
Item NameGear,antibacklash,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerAtlantic Inertial Systems Inc
StatusACTIVE
Bore StylePLAIN BOTH ENDS
Style DesignatorPROTRUDING HUBS
Hub Style DesignatorPLAIN SECOND END
Pressure Angle20.0000 DEGREES
Tooth FormSTANDARD
Attachment MethodINTERNAL RING GROOVE
Mounting Hole Type and Quantity1 THREADED TRANSVERSELY THROUGH HUB FIRST END
Hub Style Designator1 GROOVE FIRST END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5310-00-262-300011382A INTERCHANGEABLE
Washer,flat
Brinkley Technology Group Llc Dba Hercules Manufacturing
3120-00-378-083111581 INTERCHANGEABLE
Bushing,sleeve
Fwd Seagrave Holdings Lp
5330-00-532-3546 INTERCHANGEABLE
Gasket
5950-00-532-6984 INTERCHANGEABLE
Coil,radio Frequency
5950-00-556-1507919455-500 INTERCHANGEABLE
Coil,radio Frequency
Raytheon Company Dba Raytheon
3040-00-594-4142SM-B-171485 INTERCHANGEABLE
Lever,manual Control
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5825-00-595-554811581 INTERCHANGEABLE
Synchro Conversion Module
Data Device Corp Dba Beta Transformer Technology
5315-00-768-023011581 INTERCHANGEABLE
Pin,straight,headed
Terex Reedrill Dba Reedrill Texoma Div Terex Mining
4210-00-928-259011581 INTERCHANGEABLE
Hose Assembly,nonmetallic,fire F
Tyco Fire Products Lp
5325-01-177-8302 INTERCHANGEABLE
Ring,retaining
Cross-Reference Index
Part NumberManufacturer
11581 Atlantic Inertial Systems Inc (USA)
11581 Atlantic Inertial Systems Inc Div Cheshire Division (USA)
Related Parts
5310-00-262-3000INTERCHANGEABLE
WASHER,FLAT
11382A
3120-00-378-0831INTERCHANGEABLE
BUSHING,SLEEVE
11581
5330-00-532-3546INTERCHANGEABLE
GASKET
5950-00-532-6984INTERCHANGEABLE
COIL,RADIO FREQUENCY
5950-00-556-1507INTERCHANGEABLE
COIL,RADIO FREQUENCY
919455-500
3040-00-594-4142INTERCHANGEABLE
LEVER,MANUAL CONTROL
SM-B-171485
5825-00-595-5548INTERCHANGEABLE
SYNCHRO CONVERSION MODULE
11581
5315-00-768-0230INTERCHANGEABLE
PIN,STRAIGHT,HEADED
11581
4210-00-928-2590INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC,FIRE F
11581
5325-01-177-8302INTERCHANGEABLE
RING,RETAINING
5305-01-273-4953INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
11581
5330-01-519-4160INTERCHANGEABLE
PARTS KIT,SEAL REPLACEMENT,MECHA
1158-1

Frequently Asked Questions

What is NSN 3020-01-025-3129?

NSN 3020-01-025-3129 is a Gear,antibacklash,spur, manufactured by Atlantic Inertial Systems Inc, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-01-025-3129?

NSN 3020-01-025-3129 has 2 cross-referenced part numbers: 11581 (Atlantic Inertial Systems Inc), 11581 (Atlantic Inertial Systems Inc Div Cheshire Division).

What NSN replaces 3020-01-025-3129?

There are 12 known substitutes for 3020-01-025-3129: 5310-00-262-3000, 3120-00-378-0831, 5330-00-532-3546 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 11581?

Key specifications for 11581: Bore Style: PLAIN BOTH ENDS; Style Designator: PROTRUDING HUBS; Hub Style Designator: PLAIN SECOND END; Pressure Angle: 20.0000 DEGREES. 8 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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