NSN 3020-01-177-2499 · NIIN 011772499 · Part number 21155
Industrial Technologies and Services Llc · FSC 3020 — Gears, Pulleys, Sprockets, and Transmission Chain · FSG 30 — Mechanical Power Transmission Equipment · CAGE 76122
Government record, cited
NSN 3020-01-177-2499 — this item is cataloged by the U.S. Government under National Stock Number 3020-01-177-2499. Manufacturer of record part number: 21155.
Also searched as3020-01-177-2499 ·
3020011772499 ·
NIIN 011772499 ·
01-177-2499 ·
FSC 3020 Gears, Pulleys, Sprockets, and Transmission Chain · CAGE 76122 · 21155
Manufacturer of record: Industrial Technologies and Services Llc
Identification
NSN: 3020-01-177-2499
NIIN: 011772499
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
FSG: 30 — Mechanical Power Transmission Equipment
Primary part number: 21155
Manufacturer: Industrial Technologies and Services Llc
General Description
The Pulley,groove, cataloged under National Stock Number 3020-01-177-2499, 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 Industrial Technologies and Services Llc. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
3020-01-177-2499
Primary Part Number
21155
Item Name
Pulley,groove
FSC / FSG
3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain
Manufacturer
Industrial Technologies and Services Llc
Status
ACTIVE
Outside Diameter
5.000 INCHES NOMINAL IN
Groove Quantity
1
Bore Diameter
0.625 INCHES NOMINAL IN
Material
IRON CAST OVERALL
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4710-01-209-290121155POSSIBLE MATCH
TUBE,TRANSFER
Possible match (shared part number)Parker Hannifin Corporation Div Hydraulic Systems Division
5950-01-407-307421155POSSIBLE MATCH
REACTOR
Possible match (shared part number)Robert M. Hadley Company, Inc.
4810-01-512-559921155-001POSSIBLE MATCH
VALVE,LINEAR,DIRECTIONAL CONTROL
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-514-844021155-1003-1POSSIBLE MATCH
FLANGE,GLAND,VALVE
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
NSN 3020-01-177-2499 is a Pulley,groove, manufactured by Industrial Technologies and Services Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
What part numbers are listed for NSN 3020-01-177-2499?
NSN 3020-01-177-2499 has 1 manufacturer part number on file: 21155 (Industrial Technologies and Services Llc).
What NSN replaces 3020-01-177-2499?
4 possible matches (shared part number, not a government interchangeability claim): 4710-01-209-2901, 5950-01-407-3074, 4810-01-512-5599. Verify interchangeability with system specifications before substitution.
What are the specifications of 21155?
Key specifications for 21155: Outside Diameter: 5.000 INCHES NOMINAL IN; Groove Quantity: 1; Bore Diameter: 0.625 INCHES NOMINAL IN; Material: IRON CAST OVERALL. 4 specifications are documented in the U.S. Government catalog.
Is NSN 3020-01-177-2499 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.