FSC 4520 — Space and Water Heating Equipment · FSG 45 — Plumbing, Heating, and Waste Disposal
Government record, cited
Also searched as4520-01-177-4101 ·
4520011774101 ·
NIIN 011774101 ·
01-177-4101 ·
FSC 4520 Space and Water Heating Equipment
Nearby stock numbers← 4520-01-177-0111 Pipe, Air Conditioning-Heating
·
4520-01-177-5302 Heating Element, Electrical, Immer →
Features
Igniter,spark,fuel — FSC 4520
Length: 6.250 INCHES NOMINAL IN
Mounting Method: THREAD
Polarization Feature: NOT INCLUDED
Diameter: 0.125 INCHES NOMINAL IN
Mounting Facility Thread Size: 7/8-18
Plug Design: STRAIGHT
Identification
NSN: 4520-01-177-4101
NIIN: 011774101
FSC: 4520 — Space and Water Heating Equipment
FSG: 45 — Plumbing, Heating, and Waste Disposal
General Description
The Igniter,spark,fuel, cataloged under National Stock Number 4520-01-177-4101, 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6 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4520-01-177-4101
Item Name
Igniter,spark,fuel
FSC / FSG
4520 / 45 — Space and Water Heating Equipment
Status
ACTIVE
Length
6.250 INCHES NOMINAL IN
Mounting Method
THREAD
Polarization Feature
NOT INCLUDED
Diameter
0.125 INCHES NOMINAL IN
Mounting Facility Thread Size
7/8-18
Plug Design
STRAIGHT
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
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
45042283-04
3/9Design control — primary reference
U.S. Government activity
No interchangeability data on file.
Other items in FSC 4520 — Space and Water Heating Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4520-00-000-0098
HEATING ELEMENT,ELECTRICAL,NONIM
4520-00-000-0099
4520-00-000-0099 · Item name not on file
4520-00-001-1240
4520-00-001-1240 · Item name not on file
4520-00-001-3518
HEATING ELEMENT,ELECTRICAL,NONIM
4520-00-001-3519
HEATING ELEMENT,ELECTRICAL,IMMER
4520-00-001-6052
HEATING ELEMENT,ELECTRICAL,NONIM
4520-00-001-6298
HEATING ELEMENT,ELECTRICAL,NONIM
4520-00-001-7726
HEATER,DUCT TYPE,PORTABLE
Frequently Asked Questions
What is NSN 4520-01-177-4101?
NSN 4520-01-177-4101 is a Igniter,spark,fuel, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
What are the specifications of 4520-01-177-4101?
Key specifications for 4520-01-177-4101: Length: 6.250 INCHES NOMINAL IN; Mounting Method: THREAD; Polarization Feature: NOT INCLUDED; Diameter: 0.125 INCHES NOMINAL IN. 6 specifications are documented in the U.S. Government catalog.
Is NSN 4520-01-177-4101 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.