FSC 1650 — Aircraft Hydraulic, Vacuum, and De-icing System Components · FSG 16 — Aircraft Components and Accessories
Government record, cited
Also searched as1650-00-445-8121 ·
1650004458121 ·
NIIN 004458121 ·
00-445-8121 ·
FSC 1650 Aircraft Hydraulic, Vacuum, and De-icing System Components · 707372 · 700038
Nearby stock numbers← 1650-00-445-8119 Piston and Slipper
·
1650-00-445-8125 →
Features
Cylinder,block Assembly — FSC 1650
Identification
NSN: 1650-00-445-8121
NIIN: 004458121
FSC: 1650 — Aircraft Hydraulic, Vacuum, and De-icing System Components
FSG: 16 — Aircraft Components and Accessories
General Description
The Cylinder,block Assembly, cataloged under National Stock Number 1650-00-445-8121, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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.
Catalog Facts
Item Name
Cylinder,block Assembly
FSC / FSG
1650 — Aircraft Hydraulic, Vacuum, and De-icing System Components (FSG 16)
Technical Specifications
Parameter
Value
NSN
1650-00-445-8121
Item Name
Cylinder,block Assembly
FSC / FSG
1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL Q — CCL Item — Commerce Control List
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.
5331-01-044-27919131009-10POSSIBLE MATCH
O-RING
Possible match (shared part number)Mile High Equipment Company Dba Ice-O-Matic
4820-01-073-7419TA770-700038POSSIBLE MATCH
VALVE,PRESSURE EQUALIZING,GASEOU
Possible match (shared part number)Agm Container Controls Inc Dba Agm Container Controls Inc
5330-01-142-11847000-3/8POSSIBLE MATCH
PACKING WITH RETAINER
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division
5340-01-614-1780E5-6-005-UU1POSSIBLE MATCH
FASTENER,PAWL
Possible match (shared part number)Southco Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
707372
3/2Design control — primary reference
U.S. Government activity
700038
5/9Secondary reference
U.S. Government activity
Related Parts
5331-01-044-2791POSSIBLE MATCH
O-RING
9131009-10
4820-01-073-7419POSSIBLE MATCH
VALVE,PRESSURE EQUALIZING,GASEOU
TA770-700038
5330-01-142-1184POSSIBLE MATCH
PACKING WITH RETAINER
7000-3/8
5340-01-614-1780POSSIBLE MATCH
FASTENER,PAWL
E5-6-005-UU1
Frequently Asked Questions
What is NSN 1650-00-445-8121?
NSN 1650-00-445-8121 is a Cylinder,block Assembly, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
What NSN replaces 1650-00-445-8121?
4 possible matches (shared part number, not a government interchangeability claim): 5331-01-044-2791, 4820-01-073-7419, 5330-01-142-1184. Verify interchangeability with system specifications before substitution.
Is NSN 1650-00-445-8121 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.
What is the DEMIL code for NSN 1650-00-445-8121?
NSN 1650-00-445-8121 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.