Material Document and Classification: QQ-S-763, CLASS 321, COND A FED SPEC 1ST MATERIAL RESPONSE
Material: STEEL COMP 321
Identification
NSN: 4820-01-397-7125
NIIN: 013977125
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
General Description
The Guide,valve Stem, cataloged under National Stock Number 4820-01-397-7125, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-397-7125
Item Name
Guide,valve Stem
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Material Document and Classification
QQ-S-763, CLASS 321, COND A FED SPEC 1ST MATERIAL RESPONSE
Material
STEEL COMP 321
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 Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-408-4750PLC-11535-32POSSIBLE MATCH
VALVE,CHECK
Possible match (shared part number)Admiral Valve Llc Dba Cpv Manufacturing
4820-01-442-5814PLC-11535-24POSSIBLE MATCH
VALVE,CHECK
Possible match (shared part number)Admiral Valve Llc Dba Cpv Manufacturing
4820-01-442-5815PLC-11535-12POSSIBLE MATCH
VALVE,CHECK
Possible match (shared part number)Admiral Valve Llc Dba Cpv Manufacturing
4820-01-504-2464115365CDPOSSIBLE MATCH
BODY,VALVE
Possible match (shared part number)Admiral Valve Llc Dba Cpv Manufacturing
4820-01-504-2503POSSIBLE MATCH
VALVE,CHECK
Possible match (shared part number)
4820-01-730-9152POSSIBLE MATCH
VALVE,CHECK
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
115367CD
3/2Design control — primary reference
U.S. Government activity
PLC-11535-4 SZ 1.50
5/2Secondary reference
U.S. Government activity
PLC-11535
D/9Drawing number reference only
U.S. Government activity
Related Parts
4820-01-408-4750POSSIBLE MATCH
VALVE,CHECK
PLC-11535-32
4820-01-442-5814POSSIBLE MATCH
VALVE,CHECK
PLC-11535-24
4820-01-442-5815POSSIBLE MATCH
VALVE,CHECK
PLC-11535-12
4820-01-504-2464POSSIBLE MATCH
BODY,VALVE
115365CD
4820-01-504-2503POSSIBLE MATCH
VALVE,CHECK
4820-01-730-9152POSSIBLE MATCH
VALVE,CHECK
Frequently Asked Questions
What is NSN 4820-01-397-7125?
NSN 4820-01-397-7125 is a Guide,valve Stem, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-397-7125?
6 possible matches (shared part number, not a government interchangeability claim): 4820-01-408-4750, 4820-01-442-5814, 4820-01-442-5815. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-397-7125?
Key specifications for 4820-01-397-7125: Material Document and Classification: QQ-S-763, CLASS 321, COND A FED SPEC 1ST MATERIAL RESPONSE; Special Features: 1.500 IPS; USED ON VALVE,CHECK, INLINE, BLEED, NON-REVERSIBLE 3000 PSI; Material: STEEL COMP 321. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-397-7125 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.