FSC 4520 — Space and Water Heating Equipment · FSG 45 — Plumbing, Heating, and Waste Disposal
Government record, cited
Also searched as4520-01-162-2745 ·
4520011622745 ·
NIIN 011622745 ·
01-162-2745 ·
FSC 4520 Space and Water Heating Equipment
Nearby stock numbers← 4520-01-162-2511 Heating Element, Electrical, Nonim
·
4520-01-162-2821 Tee, Air Conditioning-Heating →
Features
Collar,air Conditioning-Heating — FSC 4520
Fitting Inside Diameter: 14.000 INCHES NOMINAL IN
Style Designator: ROUND
Sheet Metal Gage Size: 20
Surface Treatment: ZINC
Material: STEEL
Fitting Overall Length: 4.000 INCHES NOMINAL IN
Identification
NSN: 4520-01-162-2745
NIIN: 011622745
FSC: 4520 — Space and Water Heating Equipment
FSG: 45 — Plumbing, Heating, and Waste Disposal
General Description
The Collar,air Conditioning-Heating, cataloged under National Stock Number 4520-01-162-2745, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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
4520-01-162-2745
Item Name
Collar,air Conditioning-Heating
FSC / FSG
4520 / 45 — Space and Water Heating Equipment
Status
ACTIVE
Fitting Inside Diameter
14.000 INCHES NOMINAL IN
Style Designator
ROUND
Sheet Metal Gage Size
20
Surface Treatment
ZINC
Material
STEEL
Fitting Overall Length
4.000 INCHES NOMINAL IN
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.
1680-01-481-564014214POSSIBLE MATCH
SEAT,AIRCRAFT
Possible match (shared part number)Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company
6515-01-502-768114214POSSIBLE MATCH
BALLOON CATHETER,VASCULAR-NONVAS
Possible match (shared part number)Rochester Medical Corporation
2590-01-673-391914214POSSIBLE MATCH
BRACKET,VEHICULAR COMPONENTS
Possible match (shared part number)Smiths Detection Inc. Dba Smiths Detection Inc Casc
4720-01-731-059614214POSSIBLE MATCH
HOSE SET,NONMETALLIC
Possible match (shared part number)Cepeda Associates, Inc. Dba Cepeda Associates Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
14-2-14
3/9Design control — primary reference
United Mcgill Corp
Related Parts
1680-01-481-5640POSSIBLE MATCH
SEAT,AIRCRAFT
14214
6515-01-502-7681POSSIBLE MATCH
BALLOON CATHETER,VASCULAR-NONVAS
14214
2590-01-673-3919POSSIBLE MATCH
BRACKET,VEHICULAR COMPONENTS
14214
4720-01-731-0596POSSIBLE MATCH
HOSE SET,NONMETALLIC
14214
Frequently Asked Questions
What is NSN 4520-01-162-2745?
NSN 4520-01-162-2745 is a Collar,air Conditioning-Heating, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
What NSN replaces 4520-01-162-2745?
4 possible matches (shared part number, not a government interchangeability claim): 1680-01-481-5640, 6515-01-502-7681, 2590-01-673-3919. Verify interchangeability with system specifications before substitution.
What are the specifications of 4520-01-162-2745?
Key specifications for 4520-01-162-2745: Fitting Inside Diameter: 14.000 INCHES NOMINAL IN; Style Designator: ROUND; Sheet Metal Gage Size: 20; Surface Treatment: ZINC. 6 specifications are documented in the U.S. Government catalog.
Is NSN 4520-01-162-2745 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.