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Technical Data Sheet
3985-74 ✓ 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 GASKET is a the manufacturer industrial component. Key specifications include material: CELLULOSE OVERALL, hole_diameter: 0.687 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, outside_diameter: 17.000 INCHES NOMINAL IN, special_features: 4 HOLES 90 DEGREES APART,4 HOLES,2 EACH SIDE,30 DEGREES EA SIDE OF CENTERLINE, aperture_diameter: 14.000 INCHES NOMINAL IN, bolt_circle_diameter: 15.250 INCHES NOMINAL 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 5330-01-052-9187, 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
3985-74
NSN: 5330-01-052-9187
FSC: 5330
CAGE: 34712 — LAKE SHORE SYSTEMS, INC. (USA)
SPECIFICATIONS
materialCELLULOSE OVERALL
hole_diameter0.687 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
outside_diameter17.000 INCHES NOMINAL IN
special_features4 HOLES 90 DEGREES APART,4 HOLES,2 EACH SIDE,30 DEGREES EA SIDE OF CENTERLINE
aperture_diameter14.000 INCHES NOMINAL IN
bolt_hole_quantity8
bolt_circle_diameter15.250 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationCS-301 FSCM 89262 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NSN5330-01-052-9187
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3985-74 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
HOLE DIAMETER: 0.687 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
MATERIAL DOCUMENT AND CLASSIFICATION: CS-301 FSCM 89262 MFR REF SINGLE MATERIAL RESPONSE OVERALL
APERTURE DIAMETER: 14.000 INCHES NOMINAL IN
BOLT HOLE QUANTITY: 8
BOLT CIRCLE DIAMETER: 15.250 INCHES NOMINAL IN
MATERIAL: CELLULOSE OVERALL
OUTSIDE DIAMETER: 17.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.687 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
MATERIAL DOCUMENT AND CLASSIFICATIONCS-301 FSCM 89262 MFR REF SINGLE MATERIAL RESPONSE OVERALL
APERTURE DIAMETER14.000 INCHES NOMINAL IN
SPECIAL FEATURES4 HOLES 90 DEGREES APART,4 HOLES,2 EACH SIDE,30 DEGREES EA SIDE OF CENTERLINE
BOLT HOLE QUANTITY8
BOLT CIRCLE DIAMETER15.250 INCHES NOMINAL IN
MATERIALCELLULOSE OVERALL
OUTSIDE DIAMETER17.000 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
1200232Interchangeable
interchangeable cross-reference
interchangeable
49-029Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3985-74?
3985-74 is a GASKET.
What parts can replace 3985-74?
There are 2 known substitutes for 3985-74: 1200232, 49-029. Substitute compatibility should be verified for your specific system.
What is the NSN for 3985-74?
3985-74 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-052-9187. This indicates validated use in U.S. government and defense supply chains.
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