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PartsTable / COMPONENT / H39644H
H39644H ✓ 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 overall_width: 5.500 INCHES NOMINAL IN, aperture_width: 4.375 INCHES NOMINAL IN, overall_length: 28.875 INCHES NOMINAL IN, aperture_length: 27.750 INCHES NOMINAL IN, inside_corner_radius: 0.438 INCHES NOMINAL IN, outside_corner_radius: 1.000 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-383-8791, 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
H39644H
NSN: 5330-00-383-8791
FSC: 5330
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
overall_width5.500 INCHES NOMINAL IN
aperture_width4.375 INCHES NOMINAL IN
overall_length28.875 INCHES NOMINAL IN
aperture_length27.750 INCHES NOMINAL IN
inside_corner_radius0.438 INCHES NOMINAL IN
outside_corner_radius1.000 INCHES NOMINAL IN
cross-sectional_thickness0.125 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationMIL-G-12803,NO. +3415-A MIL SPEC ALL MATERIAL RESPONSES OVERALL
NSN5330-00-383-8791
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: H39644H 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
•
INSIDE CORNER RADIUS: 0.438 INCHES NOMINAL IN
•
OUTSIDE CORNER RADIUS: 1.000 INCHES NOMINAL IN
•
APERTURE WIDTH: 4.375 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
CROSS-SECTIONAL THICKNESS: 0.125 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-12803,NO. +3415-A MIL SPEC ALL MATERIAL RESPONSES OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH28.875 INCHES NOMINAL IN
INSIDE CORNER RADIUS0.438 INCHES NOMINAL IN
OUTSIDE CORNER RADIUS1.000 INCHES NOMINAL IN
APERTURE WIDTH4.375 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OVERALL WIDTH5.500 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.125 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-12803,NO. +3415-A MIL SPEC ALL MATERIAL RESPONSES OVERALL
APERTURE LENGTH27.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
C3402Interchangeable
interchangeable cross-reference
interchangeable
040-00073Interchangeable
interchangeable cross-reference
interchangeable
SMD632770Interchangeable
interchangeable cross-reference
interchangeable
71161Interchangeable
interchangeable cross-reference
interchangeable
5920Interchangeable
interchangeable cross-reference
interchangeable
TD0311Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H39644H?
H39644H is a GASKET.
What parts can replace H39644H?
There are 9 known substitutes for H39644H: C3402, 040-00073, SMD632770 and 6 more. Substitute compatibility should be verified for your specific system.
Is H39644H still available?
H39644H is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026