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N39042 ✓ 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

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL COMP 416, design_type: SOLID, end_diameter: 0.7400 INCHES MINIMUM AND 0.7450 INCHES MAXIMUM IN, overall_height: 0.6875 INCHES NOMINAL IN, first_step_length: 0.2500 INCHES NOMINAL IN, first_step_diameter: 1.6094 INCHES MINIMUM AND 1.6250 INCHES MAXIMUM 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 5340-01-175-7820, 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
N39042
NSN: 5340-01-175-7820
FSC: 5340
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 416
design_typeSOLID
end_diameter0.7400 INCHES MINIMUM AND 0.7450 INCHES MAXIMUM IN
overall_height0.6875 INCHES NOMINAL IN
first_step_length0.2500 INCHES NOMINAL IN
first_step_diameter1.6094 INCHES MINIMUM AND 1.6250 INCHES MAXIMUM IN
second_end_diameter0.8120 INCHES MINIMUM AND 0.8280 INCHES MAXIMUM IN
distance_from_end_to_first_step0.1875 INCHES NOMINAL IN
material_document_and_classificationASTM A582, TYPE 416 ASSN STD SINGLE MATERIAL RESPONSE
NSN5340-01-175-7820
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: N39042 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
•
END DIAMETER: 0.7400 INCHES MINIMUM AND 0.7450 INCHES MAXIMUM IN
•
DISTANCE FROM END TO FIRST STEP: 0.1875 INCHES NOMINAL IN
•
SECOND END DIAMETER: 0.8120 INCHES MINIMUM AND 0.8280 INCHES MAXIMUM IN
•
DESIGN TYPE: SOLID
•
MATERIAL: STEEL COMP 416
•
FIRST STEP DIAMETER: 1.6094 INCHES MINIMUM AND 1.6250 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582, TYPE 416 ASSN STD SINGLE MATERIAL RESPONSE
•
FIRST STEP LENGTH: 0.2500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
END DIAMETER0.7400 INCHES MINIMUM AND 0.7450 INCHES MAXIMUM IN
DISTANCE FROM END TO FIRST STEP0.1875 INCHES NOMINAL IN
SECOND END DIAMETER0.8120 INCHES MINIMUM AND 0.8280 INCHES MAXIMUM IN
DESIGN TYPESOLID
MATERIALSTEEL COMP 416
FIRST STEP DIAMETER1.6094 INCHES MINIMUM AND 1.6250 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582, TYPE 416 ASSN STD SINGLE MATERIAL RESPONSE
FIRST STEP LENGTH0.2500 INCHES NOMINAL IN
OVERALL HEIGHT0.6875 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
69020Interchangeable
interchangeable cross-reference
interchangeable
39042Interchangeable
interchangeable cross-reference
interchangeable
239042Interchangeable
interchangeable cross-reference
interchangeable
12914N PIECE 9Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is N39042?
N39042 is a SEAT,HELICAL COMPRESSION SPRING.
What parts can replace N39042?
There are 4 known substitutes for N39042: 69020, 39042, 239042 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for N39042?
N39042 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-175-7820. 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