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Technical Data Sheet
40402-4 PC 43 ✓ 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

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, temp_rating: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF, hardness_rating: 75.0 SHORE DUROMETER A NOMINAL, center_hole_diameter: 1.734 INCHES NOMINAL IN, cross-sectional_height: 0.139 INCHES NOMINAL IN, end_item_identification: 2 IN. SEA WATER PRESSURE REDUCING VALVE IN.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-587-1914, 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
40402-4 PC 43
NSN: 5331-01-587-1914
FSC: 5331 — O-RING
CAGE: 55378 — TRAC REGULATOR CO., INC. DBA TRAC REGULATOR CO INC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
temp_rating-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
hardness_rating75.0 SHORE DUROMETER A NOMINAL
center_hole_diameter1.734 INCHES NOMINAL IN
cross-sectional_height0.139 INCHES NOMINAL IN
end_item_identification2 IN. SEA WATER PRESSURE REDUCING VALVE IN
material_document_and_classificationMIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE
part_name_assigned_by_controlling_agencySTEM O-RING
NSN5331-01-587-1914
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 40402-4 PC 43 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
TEMP RATING: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE
CENTER HOLE DIAMETER: 1.734 INCHES NOMINAL IN
HARDNESS RATING: 75.0 SHORE DUROMETER A NOMINAL
CROSS-SECTIONAL HEIGHT: 0.139 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
TEMP RATING-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE
CENTER HOLE DIAMETER1.734 INCHES NOMINAL IN
END ITEM IDENTIFICATION2 IN. SEA WATER PRESSURE REDUCING VALVE IN
HARDNESS RATING75.0 SHORE DUROMETER A NOMINAL
CROSS-SECTIONAL HEIGHT0.139 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYSTEM O-RING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
428-02Interchangeable
Cartridge,76 Millimeter
interchangeable
1315-260-0015Interchangeable
Cartridge,76 Millimeter
interchangeable
1315-C120Interchangeable
Cartridge,76 Millimeter
interchangeable
BX-9992Interchangeable
interchangeable cross-reference
interchangeable
1676527Interchangeable
interchangeable cross-reference
interchangeable
Y9227Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40402-4 PC 43?
40402-4 PC 43 is a O-RING.
What parts can replace 40402-4 PC 43?
There are 9 known substitutes for 40402-4 PC 43: 428-02, 1315-260-0015, 1315-C120 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 40402-4 PC 43?
40402-4 PC 43 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-587-1914. This indicates validated use in U.S. government and defense supply chains.
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