The Seat,relief, cataloged under National Stock Number 1630-00-780-5823, is classified within Federal Supply Class 1630 (Aircraft Wheel and Brake Systems) of the Aircraft Components and Accessories group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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
Seat,relief
FSC / FSG
1630 — Aircraft Wheel and Brake Systems (FSG 16)
Technical Specifications
Parameter
Value
NSN
1630-00-780-5823
Item Name
Seat,relief
FSC / FSG
1630 / 16 — Aircraft Wheel and Brake Systems
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL Q — CCL Item — Commerce Control List
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
⇄Related Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
6515-01-106-7093POSSIBLE MATCH
BONE PLATE
Possible match (shared part number)
4730-01-129-287412504POSSIBLE MATCH
STRAINER,SEDIMENT
Possible match (shared part number)Clayton Manufacturing Company
5120-01-273-697912-504POSSIBLE MATCH
BRACKET,MORTAR FLOAT
Possible match (shared part number)Bon Tool Co
5331-01-278-9479POSSIBLE MATCH
O-RING
Possible match (shared part number)
4820-01-498-6779POSSIBLE MATCH
VALVE,SAFETY RELIEF
Possible match (shared part number)
2520-01-575-09331542773POSSIBLE MATCH
PARTS KIT,THROTTLE CONTROL LEVER
Possible match (shared part number)Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
12504
3/2Design control — primary reference
U.S. Government activity
Related Parts
6515-01-106-7093POSSIBLE MATCH
BONE PLATE
4730-01-129-2874POSSIBLE MATCH
STRAINER,SEDIMENT
12504
5120-01-273-6979POSSIBLE MATCH
BRACKET,MORTAR FLOAT
12-504
5331-01-278-9479POSSIBLE MATCH
O-RING
4820-01-498-6779POSSIBLE MATCH
VALVE,SAFETY RELIEF
2520-01-575-0933POSSIBLE MATCH
PARTS KIT,THROTTLE CONTROL LEVER
1542773
Frequently Asked Questions
What is NSN 1630-00-780-5823?
NSN 1630-00-780-5823 is a Seat,relief, classified under FSC 1630, Aircraft Wheel and Brake Systems. Status: active.
What NSN replaces 1630-00-780-5823?
6 possible matches (shared part number, not a government interchangeability claim): 6515-01-106-7093, 4730-01-129-2874, 5120-01-273-6979. Verify interchangeability with system specifications before substitution.
Is NSN 1630-00-780-5823 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
What is the DEMIL code for NSN 1630-00-780-5823?
NSN 1630-00-780-5823 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.