PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

104-30Gear,spur

Southern Gear & Machine Inc · NSN 3020-00-657-6764 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-657-6764 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-657-6764. Primary manufacturer part number: 104-30.
Features
  • Gear,spur — FSC 3020
  • Material Document and Classification: MIL-S-7720,COMP 303SE MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Bore Nominal Diameter: 0.250 INCHES BOTH ENDS IN
  • Style Designator: PROTRUDING HUB
  • Tooth Form: STANDARD
  • Hub Nominal Diameter: 0.406 INCHES FIRST END IN
  • Nominal Distance Between Body Face and Protruding Hub End: 0.250 INCHES FIRST END IN
  • Hub Style Designator: PINNED FIRST END
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Steel Comp 303SE Overall construction
General Description

The Gear,spur, cataloged under National Stock Number 3020-00-657-6764, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Southern Gear & Machine Inc. Government technical data includes 18 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
NSN3020-00-657-6764
Primary Part Number104-30
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerSouthern Gear & Machine Inc
StatusACTIVE
Material Document and ClassificationMIL-S-7720,COMP 303SE MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Bore Nominal Diameter0.250 INCHES BOTH ENDS IN
Style DesignatorPROTRUDING HUB
Tooth FormSTANDARD
Hub Nominal Diameter0.406 INCHES FIRST END IN
Nominal Distance Between Body Face and Protruding Hub End0.250 INCHES FIRST END IN
Hub Style DesignatorPINNED FIRST END
Body StylePLAIN, SOLID
Pressure Angle14.5000 DEGREES
Teeth Quantity30
Precision ClassificationQUALITY NUMBER 12
Bore StylePLAIN BOTH ENDS
Pitch Diameter0.6250 INCHES NOMINAL IN
Surface TreatmentPASSIVATE OVERALL
MaterialSTEEL COMP 303SE OVERALL
Nominal Outside Diameter0.672 INCHES IN
Face Nominal Width0.125 INCHES IN
Hardness Rating75.0 ROCKWELL B MINIMUM AND 83.0 ROCKWELL B MAXIMUM OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6685-00-048-79318T1204B3 INTERCHANGEABLE
Thermocouple,immersion
Horizon Aerospace Llc Dba Magnetics Division
6650-00-107-8509 INTERCHANGEABLE
Refractometer
5945-00-193-0089 INTERCHANGEABLE
Flasher,thermal
5310-00-209-3871 INTERCHANGEABLE
Washer,lock
2920-00-364-0940127-9 INTERCHANGEABLE
Lever,contact Point
Dresser Industries Inc Leroi Div
5310-00-721-7810 INTERCHANGEABLE
Washer,lock
5915-00-723-2056 INTERCHANGEABLE
Filter,radio Frequency Interfere
3110-00-918-789410430 INTERCHANGEABLE
Bearing
Kone Inc.
5820-01-063-340210430 INTERCHANGEABLE
Control,remote
Harris Corporation Div Microwave Communication Division
4730-01-280-8216 INTERCHANGEABLE
Sleeve,flared,tube Fitting
Cross-Reference Index
Part NumberManufacturer
104-30 PRIMARY Southern Gear & Machine Inc (USA)
Related Parts
6685-00-048-7931INTERCHANGEABLE
THERMOCOUPLE,IMMERSION
8T1204B3
6650-00-107-8509INTERCHANGEABLE
REFRACTOMETER
5945-00-193-0089INTERCHANGEABLE
FLASHER,THERMAL
5310-00-209-3871INTERCHANGEABLE
WASHER,LOCK
2920-00-364-0940INTERCHANGEABLE
LEVER,CONTACT POINT
127-9
5310-00-721-7810INTERCHANGEABLE
WASHER,LOCK
5915-00-723-2056INTERCHANGEABLE
FILTER,RADIO FREQUENCY INTERFERE
3110-00-918-7894INTERCHANGEABLE
BEARING
10430
5820-01-063-3402INTERCHANGEABLE
CONTROL,REMOTE
10430
4730-01-280-8216INTERCHANGEABLE
SLEEVE,FLARED,TUBE FITTING
6130-01-314-4083INTERCHANGEABLE
POWER SUPPLY
10430
1010-01-522-8039INTERCHANGEABLE
MOUNT,GUN

Frequently Asked Questions

What is NSN 3020-00-657-6764?

NSN 3020-00-657-6764 is a Gear,spur, manufactured by Southern Gear & Machine Inc, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-00-657-6764?

NSN 3020-00-657-6764 has 1 cross-referenced part number: 104-30 (Southern Gear & Machine Inc).

What NSN replaces 3020-00-657-6764?

There are 12 known substitutes for 3020-00-657-6764: 6685-00-048-7931, 6650-00-107-8509, 5945-00-193-0089 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 104-30?

Key specifications for 104-30: Material Document and Classification: MIL-S-7720,COMP 303SE MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Bore Nominal Diameter: 0.250 INCHES BOTH ENDS IN; Style Designator: PROTRUDING HUB; Tooth Form: STANDARD. 18 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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