NSN 5340-01-721-6958 · NIIN 017216958 · Part number 8216643-26
Naval Sea Systems Command · FSC 5340 — Hardware, Commercial · FSG 53 — Hardware and Abrasives · CAGE 53711
Government record, cited
NSN 5340-01-721-6958 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-721-6958. Manufacturer of record part number: 8216643-26.
Nearby stock numbers← 5340-01-721-6891 Base, Stand
·
5340-01-721-7013 Handle, Manual Control →
Features
Cap,filler Opening — FSC 5340
2 manufacturer part numbers on file
Manufacturer of record: Naval Sea Systems Command
Identification
NSN: 5340-01-721-6958
NIIN: 017216958
FSC: 5340 — Hardware, Commercial
FSG: 53 — Hardware and Abrasives
Primary part number: 8216643-26
Manufacturer: Naval Sea Systems Command
General Description
The Cap,filler Opening, cataloged under National Stock Number 5340-01-721-6958, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 10 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
Catalog Facts
Item Name
Cap,filler Opening
FSC / FSG
5340 — Hardware, Commercial (FSG 53)
Manufacturers
Naval Sea Systems Command (CAGE 53711)
Technical Specifications
Parameter
Value
NSN
5340-01-721-6958
Primary Part Number
8216643-26
Item Name
Cap,filler Opening
FSC / FSG
5340 / 53 — Hardware, Commercial
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Criticality Code
X
Unit of Issue
EA
⇄Related Items10
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5340-01-723-4250ERH751-0512A78-33POSSIBLE MATCH
BRACKET,MOUNTING
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5340-01-723-7274ERH751-0512A78-28POSSIBLE MATCH
BRACKET,ANGLE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5340-01-723-7297ERH751-0512A78-34POSSIBLE MATCH
BRACKET,MOUNTING
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5340-01-723-7308ERH751-0512A78-27POSSIBLE MATCH
BRACKET,ANGLE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5340-01-723-7874ERH751-0512A78-26POSSIBLE MATCH
BRACKET,MOUNTING
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5340-01-724-0433ERH751-0512A78-24POSSIBLE MATCH
CATCH,CLAMPING
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5340-01-724-0488ERH751-0512A78-31POSSIBLE MATCH
CATCH,CLAMPING
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5340-01-724-0525ERH751-0512A78-A600POSSIBLE MATCH
HINGE,ACCESS DOOR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-724-87368216643-A8POSSIBLE MATCH
CONNECTING LINK,RIGID
Possible match (shared part number)Naval Sea Systems Command
3040-01-724-87958216643-A2POSSIBLE MATCH
CONNECTING LINK,RIGID
Possible match (shared part number)Naval Sea Systems Command
NSN 5340-01-721-6958 is a Cap,filler Opening, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
What part numbers are listed for NSN 5340-01-721-6958?
NSN 5340-01-721-6958 has 2 manufacturer part numbers on file: 8216643-26 (Naval Sea Systems Command), 223-8216643-26 (Naval Sea Systems Command).
What NSN replaces 5340-01-721-6958?
10 possible matches (shared part number, not a government interchangeability claim): 5340-01-723-4250, 5340-01-723-7274, 5340-01-723-7297. Verify interchangeability with system specifications before substitution.
Is NSN 5340-01-721-6958 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.
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.