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6985434 — PISTON,LINEAR ACTUATING CYLINDER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6985434: PISTON,LINEAR ACTUATING CYLINDER.

PISTON,LINEAR ACTUATING CYLINDER. Key specifications include material: COPPER ALLOY, overall_length: 3.000 INCHES NOMINAL IN, connection_style: GROOVED (PIPE) ALL ENDS, outside_diameter: 7.218 INCHES MINIMUM AND 7.220 INCHES MAXIMUM IN, special_features: MATERIAL IS ASTM B150, ALLOW C63200; USED ON STERN DIVE GEAR PORT & STARBOARD HYDRAULIC CYLINDER, mounting_position: HORIZONTAL. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-488-8354, 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
6985434
NSN: 5340-01-488-8354
NIINs: 014888354, 014895931, 014903222, 014906273, 014906572, 014907098, 014907101, 017222628, 017332593, 017333000, 017333062
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY
overall_length3.000 INCHES NOMINAL IN
connection_styleGROOVED (PIPE) ALL ENDS
outside_diameter7.218 INCHES MINIMUM AND 7.220 INCHES MAXIMUM IN
special_featuresMATERIAL IS ASTM B150, ALLOW C63200; USED ON STERN DIVE GEAR PORT & STARBOARD HYDRAULIC CYLINDER
mounting_positionHORIZONTAL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
flow_control_devicePOPPET
ring_groove_quantity2
valve_operation_methodAUTOMATIC
end_item_identificationW/S DESIGNATOR LOS ANGELES CLASS SSN (688)W/S DESIGNATOR LOS ANGELES CLASS SSN (688)
material_document_and_classificationQQ-S-763, CLASS 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5340-01-488-8354
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6985434 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
SUBSTITUTES & CROSS-REFERENCES 1
H623-0507-15Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6985434?
6985434 is a PISTON,LINEAR ACTUATING CYLINDER.
What parts can replace 6985434?
There is 1 known substitute for 6985434: H623-0507-15. Substitute compatibility should be verified for your specific system.
What is the NSN for 6985434?
6985434 is cataloged in the U.S. Government catalog under NSN 5340-01-488-8354. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.