The Seat,valve, cataloged under National Stock Number 4820-01-236-7187, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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.
Technical Specifications
Parameter
Value
NSN
4820-01-236-7187
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Material
STEEL OVERALL
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL B — Remove Demilitarization Key Points
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-236-7247POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)
4820-01-236-7248POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)
4820-01-236-7249KMC-NL389-1POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Krobach Mfg. Corp. Dba Krobach Manufacturing Corp
4820-01-236-7331POSSIBLE MATCH
DISK,VALVE
Possible match (shared part number)
5340-01-236-7346POSSIBLE MATCH
SEAT,HELICAL COMPRESSION SPRING
Possible match (shared part number)
4730-01-673-4316S728POSSIBLE MATCH
COUPLING,PIPE
Possible match (shared part number)Milton Industries, Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
S728 PIECE 15
5/9Secondary reference
U.S. Government activity
NL387-1
3/9Design control — primary reference
U.S. Government activity
S728
D/9Drawing number reference only
U.S. Government activity
Related Parts
4820-01-236-7247POSSIBLE MATCH
STEM,FLUID VALVE
4820-01-236-7248POSSIBLE MATCH
STEM,FLUID VALVE
4820-01-236-7249POSSIBLE MATCH
STEM,FLUID VALVE
KMC-NL389-1
4820-01-236-7331POSSIBLE MATCH
DISK,VALVE
5340-01-236-7346POSSIBLE MATCH
SEAT,HELICAL COMPRESSION SPRING
4730-01-673-4316POSSIBLE MATCH
COUPLING,PIPE
S728
Frequently Asked Questions
What is NSN 4820-01-236-7187?
NSN 4820-01-236-7187 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-236-7187?
6 possible matches (shared part number, not a government interchangeability claim): 4820-01-236-7247, 4820-01-236-7248, 4820-01-236-7249. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-236-7187?
Key specifications for 4820-01-236-7187: Material: STEEL OVERALL. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-236-7187 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 4820-01-236-7187?
NSN 4820-01-236-7187 has DEMIL Code B. 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.