NSN 3020-00-239-3870 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-239-3870. Manufacturer of record part number: AFB8645A.
Also searched as3020-00-239-3870 ·
3020002393870 ·
NIIN 002393870 ·
00-239-3870 ·
FSC 3020 Gears, Pulleys, Sprockets, and Transmission Chain · CAGE 7PZX0 · AFB8645A · CAFB86A · CAFB86A
Mounting Hole Nominal Diameter: 0.406 INCHES AXIALLY THROUGH BODY FIRST END IN
Style Designator: HUBLESS
Material Document and Classification: MIL-S-890,ALLOY 3 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Pitch Diameter: 5.0000 INCHES NOMINAL IN
Identification
NSN: 3020-00-239-3870
NIIN: 002393870
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
FSG: 30 — Mechanical Power Transmission Equipment
Primary part number: AFB8645A
Manufacturer: Fairbanks Morse, Llc
General Description
The Gear,spur, cataloged under National Stock Number 3020-00-239-3870, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Fairbanks Morse, Llc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
3020-00-239-3870
Primary Part Number
AFB8645A
Item Name
Gear,spur
FSC / FSG
3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain
Manufacturer
Fairbanks Morse, Llc
Status
ACTIVE
Teeth Quantity
40
Body Style
PLAIN, SOLID
Precision Classification
QUALITY NUMBER 12
Mounting Hole Nominal Diameter
0.406 INCHES AXIALLY THROUGH BODY FIRST END IN
Style Designator
HUBLESS
Material Document and Classification
MIL-S-890,ALLOY 3 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Other items in FSC 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3020-00-000-0091
GEAR,SPUR
3020-00-001-0027
3020-00-001-0027 · Item name not on file
3020-00-001-0028
3020-00-001-0028 · Item name not on file
3020-00-001-0063
3020-00-001-0063 · Item name not on file
3020-00-001-0064
3020-00-001-0064 · Item name not on file
3020-00-001-0066
3020-00-001-0066 · Item name not on file
3020-00-001-0071
3020-00-001-0071 · Item name not on file
3020-00-001-0072
3020-00-001-0072 · Item name not on file
Frequently Asked Questions
What is NSN 3020-00-239-3870?
NSN 3020-00-239-3870 is a Gear,spur, manufactured by Fairbanks Morse, Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
What part numbers are listed for NSN 3020-00-239-3870?
NSN 3020-00-239-3870 has 2 manufacturer part numbers on file: CAFB86A (Fairbanks Morse, Llc), AFB8645A (Fairbanks Morse, Llc).
What are the specifications of AFB8645A?
Key specifications for AFB8645A: Teeth Quantity: 40; Body Style: PLAIN, SOLID; Precision Classification: QUALITY NUMBER 12; Mounting Hole Nominal Diameter: 0.406 INCHES AXIALLY THROUGH BODY FIRST END IN. 14 specifications are documented in the U.S. Government catalog.
Is NSN 3020-00-239-3870 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.