PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

G1-27Gear,spur

Roller Bearing Co of America, Inc Div Pic Design · NSN 3020-00-806-7973 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-806-7973 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-806-7973. Primary manufacturer part number: G1-27.
Features
  • Gear,spur — FSC 3020
  • Pitch Diameter: 0.5630 INCHES NOMINAL IN
  • Material Document and Classification: MIL-S-7720,COMP 303S MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Hub Style Designator: PINNED FIRST END
  • Body Style: PLAIN, SOLID
  • Nominal Overall Length: 0.343 INCHES IN
  • Bore Nominal Diameter: 0.187 INCHES BOTH ENDS IN
  • Style Designator: PROTRUDING HUB
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Steel Comp 303 Overall construction
General Description

The Gear,spur, cataloged under National Stock Number 3020-00-806-7973, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Roller Bearing Co of America, Inc Div Pic Design. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN3020-00-806-7973
Primary Part NumberG1-27
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerRoller Bearing Co of America, Inc Div Pic Design
StatusCANCELLED
Pitch Diameter0.5630 INCHES NOMINAL IN
Material Document and ClassificationMIL-S-7720,COMP 303S MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Hub Style DesignatorPINNED FIRST END
Body StylePLAIN, SOLID
Nominal Overall Length0.343 INCHES IN
Bore Nominal Diameter0.187 INCHES BOTH ENDS IN
Style DesignatorPROTRUDING HUB
MaterialSTEEL COMP 303 OVERALL
Bore StylePLAIN BOTH ENDS
Hub Nominal Diameter0.375 INCHES FIRST END IN
Nominal Distance Between Body Face and Protruding Hub End0.218 INCHES FIRST END IN
Nominal Outside Diameter0.604 INCHES IN
Tooth FormSTANDARD
Pressure Angle20.0000 DEGREES
Teeth Quantity27
Surface TreatmentPASSIVATE OVERALL
Face Nominal Width0.125 INCHES IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
3020-00-288-1341G127 INTERCHANGEABLE
Gear,spur
Altra Industrial Motion Corp.
3110-00-554-32811304S INTERCHANGEABLE
Bearing,ball,annular
Ntn Bearing Corporation of America
5998-01-029-2028 INTERCHANGEABLE
Circuit Card Assembly
2510-01-672-13754136381 INTERCHANGEABLE
Panel,body,vehicular
Oshkosh Defense Llc
Cross-Reference Index
Part NumberManufacturer
413638-1 Unisys Corp Defense Systems C S D Field Engineering (USA)
526028-27 Instruments and Flight Research, Inc. (USA)
G1-27 PRIMARY Roller Bearing Co of America, Inc Div Pic Design (USA)
413638-1 Naval Air Warfare Center Aircraft Division Joint Base Jbmdl (USA)
GP20-27P1 PRIMARY Secs Inc (USA)
PG4430-27 Atlas Chain Co
E21-27 PRIMARY Designatronics Incorporated Div Sterling Instruments Div (USA)
Related Parts
3020-00-288-1341INTERCHANGEABLE
GEAR,SPUR
G127
3110-00-554-3281INTERCHANGEABLE
BEARING,BALL,ANNULAR
1304S
5998-01-029-2028INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
2510-01-672-1375INTERCHANGEABLE
PANEL,BODY,VEHICULAR
4136381

Frequently Asked Questions

What is NSN 3020-00-806-7973?

NSN 3020-00-806-7973 is a Gear,spur, manufactured by Roller Bearing Co of America, Inc Div Pic Design, classified under FSC 3020 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3020-00-806-7973?

NSN 3020-00-806-7973 has 7 cross-referenced part numbers: 413638-1 (Unisys Corp Defense Systems C S D Field Engineering), 526028-27 (Instruments and Flight Research, Inc.), G1-27 (Roller Bearing Co of America, Inc Div Pic Design), 413638-1 (Naval Air Warfare Center Aircraft Division Joint Base Jbmdl), GP20-27P1 (Secs Inc) and 2 more.

What NSN replaces 3020-00-806-7973?

There are 4 known substitutes for 3020-00-806-7973: 3020-00-288-1341, 3110-00-554-3281, 5998-01-029-2028 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of G1-27?

Key specifications for G1-27: Pitch Diameter: 0.5630 INCHES NOMINAL IN; Material Document and Classification: MIL-S-7720,COMP 303S MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Hub Style Designator: PINNED FIRST END; Body Style: PLAIN, SOLID. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3020-00-806-7973 still in active supply?

NSN 3020-00-806-7973 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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