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2428623 — STOP,MECHANICAL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2428623: STOP,MECHANICAL.

The STOP,MECHANICAL is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, design_type: FLANGE, thread_class: 2A A, overall_width: 1.000 INCHES NOMINAL IN, overall_length: 5.812 INCHES NOMINAL IN, flange_thickness: 0.625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-352-6434, 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
2428623
NSN: 5340-01-352-6434
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY
design_typeFLANGE
thread_class2A A
overall_width1.000 INCHES NOMINAL IN
overall_length5.812 INCHES NOMINAL IN
flange_thickness0.625 INCHES NOMINAL IN
special_featuresQQ-N-281,FLG OD 4.000 IN. IN
nominal_thread_size1.000 INCHES IN
thread_quantity_per_inch8
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5340-01-352-6434
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2428623 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
•
FLANGE THICKNESS: 0.625 INCHES NOMINAL IN
•
DESIGN TYPE: FLANGE
•
NOMINAL THREAD SIZE: 1.000 INCHES IN
•
THREAD CLASS: 2A A
•
THREAD QUANTITY PER INCH: 8
TECHNICAL CHARACTERISTICS
FLANGE THICKNESS0.625 INCHES NOMINAL IN
DESIGN TYPEFLANGE
OVERALL LENGTH5.812 INCHES NOMINAL IN
OVERALL WIDTH1.000 INCHES NOMINAL IN
NOMINAL THREAD SIZE1.000 INCHES IN
SPECIAL FEATURESQQ-N-281,FLG OD 4.000 IN. IN
THREAD CLASS2A A
THREAD QUANTITY PER INCH8
MATERIALCOPPER ALLOY
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2428623?
2428623 is a STOP,MECHANICAL.
What is the NSN for 2428623?
2428623 is cataloged in the U.S. Government catalog under NSN 5340-01-352-6434. 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.