PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

255-22Gear,spur

Southern Gear & Machine Inc · NSN 3020-00-446-8380 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-446-8380 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-446-8380. Primary manufacturer part number: 255-22.
Features
  • Gear,spur — FSC 3020
  • Teeth Quantity: 22
  • Pitch Diameter: 0.3427 INCHES MINIMUM AND 0.3437 INCHES MAXIMUM IN
  • Body Style: PLAIN, SOLID
  • Face Nominal Width: 0.125 INCHES IN
  • Surface Treatment: PASSIVATE OVERALL
  • Bore Style: PLAIN BOTH ENDS
  • Material: STEEL COMP 303 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 3020-00-446-8380, 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 16 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-00-446-8380
Primary Part Number255-22
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerSouthern Gear & Machine Inc
StatusACTIVE
Teeth Quantity22
Pitch Diameter0.3427 INCHES MINIMUM AND 0.3437 INCHES MAXIMUM IN
Body StylePLAIN, SOLID
Face Nominal Width0.125 INCHES IN
Surface TreatmentPASSIVATE OVERALL
Bore StylePLAIN BOTH ENDS
MaterialSTEEL COMP 303 OVERALL
Tooth FormSTANDARD
Material Document and ClassificationQQ-S-764,TYPE 303,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Hub Style DesignatorPINNED FIRST END
Nominal Outside Diameter0.374 INCHES IN
Bore Nominal Diameter0.188 INCHES BOTH ENDS IN
Pressure Angle20.0000 DEGREES
Style DesignatorPROTRUDING HUB
Hub Nominal Diameter0.312 INCHES FIRST END IN
Nominal Distance Between Body Face and Protruding Hub End0.250 INCHES FIRST END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
3110-00-100-054625522 INTERCHANGEABLE
Cup,tapered Roller Bearing
Rbc Bearings Incorporated Div West Trenton Division
6830-00-192-9067 INTERCHANGEABLE
Nitrogen
9905-00-405-197225522 INTERCHANGEABLE
Band,marker
Hydro-Aire Aerospace Corp
4710-01-012-352925522 INTERCHANGEABLE
Tube Assembly,metal
Williams International Co., L.l.c.
5310-01-078-780425522R1 INTERCHANGEABLE
Nut,plain,hexagon
Nd Defense Llc
4940-01-104-127010341 INTERCHANGEABLE
Seat
Gardner Denver Water Jetting Systems, Inc. Div Engineered Package Group
4720-01-128-458625522 INTERCHANGEABLE
Hose Assembly,nonmetallic
Stewart & Stevenson Power Products Llc
5990-01-167-7043 INTERCHANGEABLE
Resolver,electrical,linear
4820-01-306-615125522 INTERCHANGEABLE
Seat,valve
Circor Aerospace, Inc. Dba Circor Aerospace Inc
4320-01-323-8247 INTERCHANGEABLE
Piston,hydraulic Motor-Pump
Cross-Reference Index
Part NumberManufacturer
255-22 PRIMARY Southern Gear & Machine Inc (USA)
Related Parts
3110-00-100-0546INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
25522
6830-00-192-9067INTERCHANGEABLE
NITROGEN
9905-00-405-1972INTERCHANGEABLE
BAND,MARKER
25522
4710-01-012-3529INTERCHANGEABLE
TUBE ASSEMBLY,METAL
25522
5310-01-078-7804INTERCHANGEABLE
NUT,PLAIN,HEXAGON
25522R1
4940-01-104-1270INTERCHANGEABLE
SEAT
10341
4720-01-128-4586INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
25522
5990-01-167-7043INTERCHANGEABLE
RESOLVER,ELECTRICAL,LINEAR
4820-01-306-6151INTERCHANGEABLE
SEAT,VALVE
25522
4320-01-323-8247INTERCHANGEABLE
PISTON,HYDRAULIC MOTOR-PUMP

Frequently Asked Questions

What is NSN 3020-00-446-8380?

NSN 3020-00-446-8380 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 3020-00-446-8380?

NSN 3020-00-446-8380 has 1 cross-referenced part number: 255-22 (Southern Gear & Machine Inc).

What NSN replaces 3020-00-446-8380?

There are 10 known substitutes for 3020-00-446-8380: 3110-00-100-0546, 6830-00-192-9067, 9905-00-405-1972 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 255-22?

Key specifications for 255-22: Teeth Quantity: 22; Pitch Diameter: 0.3427 INCHES MINIMUM AND 0.3437 INCHES MAXIMUM IN; Body Style: PLAIN, SOLID; Face Nominal Width: 0.125 INCHES IN. 16 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com