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343AS312 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

CYLINDER ASSEMBLY,ACTUATING,LINE. Key specifications include bore_diameter: 3.563 INCHES NOMINAL IN, overall_width: 4.250 INCHES NOMINAL IN, overall_height: 8.870 INCHES NOMINAL IN, extended_length: 34.065 INCHES NOMINAL IN, pressure_rating: 1300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS, compressed_length: 25.440 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3040-00-803-6716, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
343AS312
NSN: 3040-00-803-6716
FSC: 3040
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
bore_diameter3.563 INCHES NOMINAL IN
overall_width4.250 INCHES NOMINAL IN
overall_height8.870 INCHES NOMINAL IN
extended_length34.065 INCHES NOMINAL IN
pressure_rating1300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
compressed_length25.440 INCHES NOMINAL IN
design_characteristicsSINGLE ACTING SINGLE CYLINDER
integral_valve_operation_methodHYDRAULIC
NSN3040-00-803-6716
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CYLINDER ASSEMBLY,ACTUATING,LINE TITLE COMPONENT PN 343AS312 MFR CYLINDER ASSEMBLY,ACTU
KEY FEATURES
•
COMPRESSED LENGTH: 25.440 INCHES NOMINAL IN
•
BORE DIAMETER: 3.563 INCHES NOMINAL IN
•
DESIGN CHARACTERISTICS: SINGLE ACTING SINGLE CYLINDER
•
EXTENDED LENGTH: 34.065 INCHES NOMINAL IN
•
INTEGRAL VALVE OPERATION METHOD: HYDRAULIC
•
PRESSURE RATING: 1300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT8.870 INCHES NOMINAL IN
COMPRESSED LENGTH25.440 INCHES NOMINAL IN
BORE DIAMETER3.563 INCHES NOMINAL IN
DESIGN CHARACTERISTICSSINGLE ACTING SINGLE CYLINDER
EXTENDED LENGTH34.065 INCHES NOMINAL IN
INTEGRAL VALVE OPERATION METHODHYDRAULIC
PRESSURE RATING1300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
OVERALL WIDTH4.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
4970Interchangeable
interchangeable cross-reference
interchangeable
4970BInterchangeable
interchangeable cross-reference
interchangeable
46-90003Interchangeable
interchangeable cross-reference
interchangeable
SAFETY-WALK PRIMERInterchangeable
interchangeable cross-reference
interchangeable
MIL-PRF-20696FInterchangeable
interchangeable cross-reference
interchangeable
MIL-C-20696Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 343AS312?
343AS312 is a CYLINDER ASSEMBLY,ACTUATING,LINE.
What parts can replace 343AS312?
There are 9 known substitutes for 343AS312: 4970, 4970B, 46-90003 and 6 more. Substitute compatibility should be verified for your specific system.
Is 343AS312 still available?
343AS312 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026