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312819 — PARTS KIT,SELF-SEALING COUPLING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

312819: PARTS KIT,SELF-SEALING COUPLING.

PARTS KIT,SELF-SEALING COUPLING. Key specifications include end_item_identification: WATERJET,MARINE, part_name_assigned_by_controlling_agency: COUPLING ASSY 155.5 PCD HTX 30; COUPING KIT. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-584-6565, 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
312819
NSN: 5340-00-584-6565
NIINs: 005846565, 016808913
FSC: 5340 — Hardware, Commercial
CAGE: 89292 — RE-BO MFG CO INC (USA)
SPECIFICATIONS
end_item_identificationWATERJET,MARINE
part_name_assigned_by_controlling_agencyCOUPLING ASSY 155.5 PCD HTX 30; COUPING KIT
NSN5340-00-584-6565
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 312819 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
KEY FEATURES
•
OUTSIDE/TOP FLANGE DIAMETER: 0.750 INCHES NOMINAL IN
•
MATERIAL HARDNESS RATING: 70.0 DUROMETER MINIMUM AND 75.0 DUROMETER MAXIMUM
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FIRST COUNTERBORE DIAMETER: 0.375 INCHES NOMINAL IN
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STYLE DESIGNATOR: FLAT TOP COUNTERBORED
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MATERIAL DOCUMENT AND CLASSIFICATION: LAVELLE RUBBER CO, RS715 MFR REF SINGLE MATERIAL RESPONSE
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FIRST COUNTERBORE DEPTH: 0.250 INCHES NOMINAL IN
•
COLOR: BLACK
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.563 INCHES NOMINAL IN
OUTSIDE/TOP FLANGE DIAMETER0.750 INCHES NOMINAL IN
MATERIAL HARDNESS RATING70.0 DUROMETER MINIMUM AND 75.0 DUROMETER MAXIMUM
FIRST COUNTERBORE DIAMETER0.375 INCHES NOMINAL IN
STYLE DESIGNATORFLAT TOP COUNTERBORED
MATERIAL DOCUMENT AND CLASSIFICATIONLAVELLE RUBBER CO, RS715 MFR REF SINGLE MATERIAL RESPONSE
FIRST COUNTERBORE DEPTH0.250 INCHES NOMINAL IN
COLORBLACK
MATERIALRUBBER
HOLE DIAMETER0.188 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
757RReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 312819?
312819 is a PARTS KIT,SELF-SEALING COUPLING.
What parts can replace 312819?
There is 1 known substitute for 312819: 757R. Substitute compatibility should be verified for your specific system.
What is the NSN for 312819?
312819 is cataloged in the U.S. Government catalog under NSN 5340-00-584-6565. 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.