PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

GP20-48Gear,spur

Secs Inc · NSN 3020-00-933-0624 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-933-0624 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-933-0624. Primary manufacturer part number: GP20-48.
Features
  • Gear,spur — FSC 3020
  • Pitch Diameter: 0.9990 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
  • Hub Style Designator: PINNED FIRST END
  • Hub Nominal Diameter: 0.375 INCHES FIRST END IN
  • Bore Nominal Diameter: 0.187 INCHES BOTH ENDS IN
  • Backlash Designation: GRADE C
  • Nominal Outside Diameter: 1.041 INCHES IN
  • Hardness Rating: 75.0 ROCKWELL B MINIMUM AND 83.0 ROCKWELL B MAXIMUM OVERALL
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 3020-00-933-0624, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Secs Inc. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN3020-00-933-0624
Primary Part NumberGP20-48
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerSecs Inc
StatusCANCELLED
Pitch Diameter0.9990 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
Hub Style DesignatorPINNED FIRST END
Hub Nominal Diameter0.375 INCHES FIRST END IN
Bore Nominal Diameter0.187 INCHES BOTH ENDS IN
Backlash DesignationGRADE C
Nominal Outside Diameter1.041 INCHES IN
Hardness Rating75.0 ROCKWELL B MINIMUM AND 83.0 ROCKWELL B MAXIMUM OVERALL
Surface TreatmentPASSIVATE OVERALL
Teeth Quantity48
Nominal Distance Between Body Face and Protruding Hub End0.218 INCHES FIRST END IN
Precision ClassificationQUALITY NUMBER 10 OR QUALITY NUMBER 11
Body StylePLAIN, SOLID
Tooth FormSTANDARD
Style DesignatorPROTRUDING HUB
Pressure Angle20.0000 DEGREES
MaterialSTEEL COMP 303 OVERALL
Material Document and ClassificationAISI 303/SAE 30303 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Nominal Overall Length0.343 INCHES IN
Bore StylePLAIN BOTH ENDS
Face Nominal Width0.125 INCHES IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
3020-00-188-3489G148 INTERCHANGEABLE
Gear,spur
Altra Industrial Motion Corp.
5905-00-681-867958A30B25-2 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5120-01-383-8639E-2148 INTERCHANGEABLE
Jack,hydraulic,hand
Goodwin L K Co
3439-01-411-3114 INTERCHANGEABLE
Welding Powder,metallic Overlay
3439-01-411-3120 INTERCHANGEABLE
Welding Powder,metallic Overlay
Cross-Reference Index
Part NumberManufacturer
422814-2 Raytheon Company Dba Raytheon (USA)
451241 Raytheon Technical Services Company (USA)
C46S48 Designatronics Inc Perfect Gear and Instrument Div (USA)
STDG3-048-09-2P1 Roller Bearing Co of America, Inc Div Pic Design (USA)
GP20-48 PRIMARY Secs Inc (USA)
C46S4B Designatronics Inc Perfect Gear and Instrument Div (USA)
G1-48 PRIMARY Roller Bearing Co of America, Inc Div Pic Design (USA)
E21-48 Designatronics Incorporated Div Sterling Instruments Div (USA)
P48S19-48 W. M. Berg, Inc. (USA)
Related Parts
3020-00-188-3489INTERCHANGEABLE
GEAR,SPUR
G148
5905-00-681-8679INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
58A30B25-2
5120-01-383-8639INTERCHANGEABLE
JACK,HYDRAULIC,HAND
E-2148
3439-01-411-3114INTERCHANGEABLE
WELDING POWDER,METALLIC OVERLAY
3439-01-411-3120INTERCHANGEABLE
WELDING POWDER,METALLIC OVERLAY

Frequently Asked Questions

What is NSN 3020-00-933-0624?

NSN 3020-00-933-0624 is a Gear,spur, manufactured by Secs Inc, classified under FSC 3020 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3020-00-933-0624?

NSN 3020-00-933-0624 has 9 cross-referenced part numbers: 422814-2 (Raytheon Company Dba Raytheon), 451241 (Raytheon Technical Services Company), C46S48 (Designatronics Inc Perfect Gear and Instrument Div), STDG3-048-09-2P1 (Roller Bearing Co of America, Inc Div Pic Design), GP20-48 (Secs Inc) and 4 more.

What NSN replaces 3020-00-933-0624?

There are 5 known substitutes for 3020-00-933-0624: 3020-00-188-3489, 5905-00-681-8679, 5120-01-383-8639 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of GP20-48?

Key specifications for GP20-48: Pitch Diameter: 0.9990 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN; Hub Style Designator: PINNED FIRST END; Hub Nominal Diameter: 0.375 INCHES FIRST END IN; Bore Nominal Diameter: 0.187 INCHES BOTH ENDS IN. 20 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3020-00-933-0624 still in active supply?

NSN 3020-00-933-0624 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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