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Technical Data Sheet
PartsTable / COMPONENT / 3N40PC325
3N40PC325 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: COPPER ALLOY, design_type: THREADED, thread_class: 2B, overall_diameter: 1.395 INCHES NOMINAL IN, inside_diameter_length: 0.615 INCHES NOMINAL IN, round_cap_outside_surface_condition: SERRATED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-218-5907, 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
3N40PC325
NSN: 5340-00-218-5907
FSC: 5340
CAGE: 54370 — ALFA LAVAL INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY
design_typeTHREADED
thread_class2B
overall_diameter1.395 INCHES NOMINAL IN
inside_diameter_length0.615 INCHES NOMINAL IN
round_cap_outside_surface_conditionSERRATED
thread_size_and_series/type_designator1.000-8 UNIFIED NATIONAL COARSE (UNC)
NSN5340-00-218-5907
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3N40PC325 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
•
THREAD CLASS: 2B
•
INSIDE DIAMETER LENGTH: 0.615 INCHES NOMINAL IN
•
DESIGN TYPE: THREADED
•
OVERALL DIAMETER: 1.395 INCHES NOMINAL IN
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 1.000-8 UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL: COPPER ALLOY
•
ROUND CAP OUTSIDE SURFACE CONDITION: SERRATED
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2B
INSIDE DIAMETER LENGTH0.615 INCHES NOMINAL IN
DESIGN TYPETHREADED
OVERALL DIAMETER1.395 INCHES NOMINAL IN
THREAD SIZE AND SERIES/TYPE DESIGNATOR1.000-8 UNIFIED NATIONAL COARSE (UNC)
MATERIALCOPPER ALLOY
ROUND CAP OUTSIDE SURFACE CONDITIONSERRATED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
3258Upgraded Successor
successor cross-reference
successor
FFB571TYPEA2Interchangeable
interchangeable cross-reference
interchangeable
USAF325-8Interchangeable
interchangeable cross-reference
interchangeable
07-852169Interchangeable
interchangeable cross-reference
interchangeable
28888Interchangeable
interchangeable cross-reference
interchangeable
3258-00Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3N40PC325?
3N40PC325 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 3N40PC325?
There are 21 known substitutes for 3N40PC325: 3258, FFB571TYPEA2, USAF325-8 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3N40PC325?
3N40PC325 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-218-5907. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026