NSN 4820-01-235-9073 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-235-9073. Manufacturer of record part number: 6503-86 PIECE 263.
General Characteristics Item Description: ALLOY STEEL,MIL-S-1222F AMEND 4 TY 1 GR B7; 5/8 IN. HEX BAR IN
2 manufacturer part numbers on file
Manufacturer of record: Huntington Ingalls Inc Div Newport News Shipbuilding
Identification
NSN: 4820-01-235-9073
NIIN: 012359073
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 6503-86 PIECE 263
Manufacturer: Huntington Ingalls Inc Div Newport News Shipbuilding
General Description
The Adapter,valve, cataloged under National Stock Number 4820-01-235-9073, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Huntington Ingalls Inc Div Newport News Shipbuilding. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-235-9073
Primary Part Number
6503-86 PIECE 263
Item Name
Adapter,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Huntington Ingalls Inc Div Newport News Shipbuilding
Status
ACTIVE
General Characteristics Item Description
ALLOY STEEL,MIL-S-1222F AMEND 4 TY 1 GR B7; 5/8 IN. HEX BAR IN
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 Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-235-90776503-86 PIECE 329POSSIBLE MATCH
COVER,BEARING
Possible match (shared part number)Huntington Ingalls Inc Div Newport News Shipbuilding
3040-01-236-72716503-86 PIECE 7POSSIBLE MATCH
LEVER,MANUAL CONTROL
Possible match (shared part number)Huntington Ingalls Inc Div Newport News Shipbuilding
3040-01-236-72726503-86 PIECE 8POSSIBLE MATCH
LEVER,MANUAL CONTROL
Possible match (shared part number)Huntington Ingalls Inc Div Newport News Shipbuilding
4820-01-239-75274457023 ITEM 297POSSIBLE MATCH
DRAG LINK,BACK-UP VALVE
Possible match (shared part number)Naval Ship Systems Command
3040-01-262-49544457-023POSSIBLE MATCH
BELL CRANK
Possible match (shared part number)Woodward, Inc.
5310-01-468-8759501-4457023 ITEM 107POSSIBLE MATCH
NUT,SELF-LOCKING,CASTELLATED,HEX
Possible match (shared part number)Naval Ship Systems Command
5365-01-613-23964457-023POSSIBLE MATCH
BUSHING,TAPERED
Possible match (shared part number)Fatigue Technology, Inc
Huntington Ingalls Inc Div Newport News Shipbuilding (USA)
Reference documents
Reference
Meaning
4457023
D/9Drawing number reference only
Huntington Ingalls Inc Div Newport News Shipbuilding
6503-86
D/9Drawing number reference only
Huntington Ingalls Inc Div Newport News Shipbuilding
Related Parts
4820-01-235-9077POSSIBLE MATCH
COVER,BEARING
6503-86 PIECE 329
3040-01-236-7271POSSIBLE MATCH
LEVER,MANUAL CONTROL
6503-86 PIECE 7
3040-01-236-7272POSSIBLE MATCH
LEVER,MANUAL CONTROL
6503-86 PIECE 8
4820-01-239-7527POSSIBLE MATCH
DRAG LINK,BACK-UP VALVE
4457023 ITEM 297
3040-01-262-4954POSSIBLE MATCH
BELL CRANK
4457-023
5310-01-468-8759POSSIBLE MATCH
NUT,SELF-LOCKING,CASTELLATED,HEX
501-4457023 ITEM 107
5365-01-613-2396POSSIBLE MATCH
BUSHING,TAPERED
4457-023
Frequently Asked Questions
What is NSN 4820-01-235-9073?
NSN 4820-01-235-9073 is a Adapter,valve, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-235-9073?
NSN 4820-01-235-9073 has 2 manufacturer part numbers on file: 6503-86 PIECE 263 (Huntington Ingalls Inc Div Newport News Shipbuilding), 4457023 ITEM 263 (Huntington Ingalls Inc Div Newport News Shipbuilding).
What NSN replaces 4820-01-235-9073?
7 possible matches (shared part number, not a government interchangeability claim): 4820-01-235-9077, 3040-01-236-7271, 3040-01-236-7272. Verify interchangeability with system specifications before substitution.
What are the specifications of 6503-86 PIECE 263?
Key specifications for 6503-86 PIECE 263: General Characteristics Item Description: ALLOY STEEL,MIL-S-1222F AMEND 4 TY 1 GR B7; 5/8 IN. HEX BAR IN; End Item Identification: SSN699 CLASS SUBMARINE AIR IND/DSLEXH HULL AND BACK-UP VALVE. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-235-9073 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.