NSN 3040-01-490-6273 · NIIN 014906273 · Part number 6985434-6
Naval Sea Systems Command · FSC 3040 — Miscellaneous Power Transmission Equipment · FSG 30 — Mechanical Power Transmission Equipment · CAGE 53711
Government record, cited
NSN 3040-01-490-6273 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-490-6273. Manufacturer of record part number: 6985434-6.
Also searched as3040-01-490-6273 ·
3040014906273 ·
NIIN 014906273 ·
01-490-6273 ·
FSC 3040 Miscellaneous Power Transmission Equipment · CAGE 53711 · 6985434-6 · H623-0507-6 · 566-6985434-6 · 6985434
Outside Diameter: 7.218 INCHES MINIMUM AND 7.220 INCHES MAXIMUM IN
Ring Groove Quantity: 2
Material: COPPER ALLOY
2 manufacturer part numbers on file
Manufacturer of record: Naval Sea Systems Command
Identification
NSN: 3040-01-490-6273
NIIN: 014906273
FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment
Primary part number: 6985434-6
Manufacturer: Naval Sea Systems Command
General Description
The Piston,linear Actuating Cylinder, cataloged under National Stock Number 3040-01-490-6273, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 3 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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
3040-01-490-6273
Primary Part Number
6985434-6
Item Name
Piston,linear Actuating Cylinder
FSC / FSG
3040 / 30 — Miscellaneous Power Transmission Equipment
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Outside Diameter
7.218 INCHES MINIMUM AND 7.220 INCHES MAXIMUM IN
Ring Groove Quantity
2
Material
COPPER ALLOY
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.
4820-01-490-65722208D-18POSSIBLE MATCH
VALVE,CHECK
Possible match (shared part number)Kepner Products Co Div Kepner Products Company
3040-01-490-7098H623-0507-10POSSIBLE MATCH
RING,ROD,PISTON
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-490-7101H623-0507-9POSSIBLE MATCH
RING,ROD,PISTON
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-722-26286985434-5POSSIBLE MATCH
PISTON,LINEAR ACTUATING CYLINDER
Possible match (shared part number)Naval Sea Systems Command
5315-01-733-2593566-6985434-26POSSIBLE MATCH
PIN,STRAIGHT,HEADED
Possible match (shared part number)Naval Sea Systems Command
5315-01-733-3000566-6985434-27POSSIBLE MATCH
PIN,STRAIGHT,HEADED
Possible match (shared part number)Naval Sea Systems Command
5315-01-733-3062566-6985434-62POSSIBLE MATCH
PIN,STRAIGHT,HEADLESS
Possible match (shared part number)Naval Sea Systems Command
NSN 3040-01-490-6273 is a Piston,linear Actuating Cylinder, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
What part numbers are listed for NSN 3040-01-490-6273?
NSN 3040-01-490-6273 has 2 manufacturer part numbers on file: 6985434-6 (Naval Sea Systems Command), 566-6985434-6 (Naval Sea Systems Command).
What NSN replaces 3040-01-490-6273?
7 possible matches (shared part number, not a government interchangeability claim): 4820-01-490-6572, 3040-01-490-7098, 3040-01-490-7101. Verify interchangeability with system specifications before substitution.
What are the specifications of 6985434-6?
Key specifications for 6985434-6: Outside Diameter: 7.218 INCHES MINIMUM AND 7.220 INCHES MAXIMUM IN; Overall Length: 3.000 INCHES NOMINAL IN; Ring Groove Quantity: 2; Special Features: MATERIAL IS ASTM B150, ALLOW C63200; USED ON STERN DIVE GEAR PORT & STARBOARD HYDRAULIC CYLINDER. 3 specifications are documented in the U.S. Government catalog.
Is NSN 3040-01-490-6273 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.