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04378 — PORTING BLOCK

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

04378: PORTING BLOCK.

The PORTING BLOCK is a the manufacturer industrial component. Key specifications include material: PAPER OVERALL, hole_diameter: 0.266 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 3.000 INCHES NOMINAL IN, style_designator: NON-CIRCULAR, aperture_diameter: 1.594 INCHES NOMINAL IN, bolt_circle_diameter: 2.875 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-406-2224, 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
04378
NSN: 5330-00-406-2224
NIINs: 004062224, 012477873
FSC: 5330 — Packing and Gasket Materials
CAGE: 75078 — JACOBS MFG CO THE (USA)
SPECIFICATIONS
materialPAPER OVERALL
hole_diameter0.266 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width3.000 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
aperture_diameter1.594 INCHES NOMINAL IN
bolt_hole_quantity2
bolt_circle_diameter2.875 INCHES NOMINAL IN
outside_corner_radius0.313 INCHES NOMINAL IN
cross-sectional_thickness0.015 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
side_radius_from_bolt_circle1.406 INCHES NOMINAL IN
NSN5330-00-406-2224
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 04378 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
•
CROSS-SECTIONAL THICKNESS: 0.015 INCHES NOMINAL IN
•
SIDE RADIUS FROM BOLT CIRCLE: 1.406 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NON-CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
APERTURE DIAMETER: 1.594 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 2
•
BOLT CIRCLE DIAMETER: 2.875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.015 INCHES NOMINAL IN
SIDE RADIUS FROM BOLT CIRCLE1.406 INCHES NOMINAL IN
STYLE DESIGNATORNON-CIRCULAR
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OVERALL WIDTH3.000 INCHES NOMINAL IN
APERTURE DIAMETER1.594 INCHES NOMINAL IN
BOLT HOLE QUANTITY2
BOLT CIRCLE DIAMETER2.875 INCHES NOMINAL IN
OUTSIDE CORNER RADIUS0.313 INCHES NOMINAL IN
MATERIALPAPER OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
SCB33410Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 04378?
04378 is a PORTING BLOCK.
What parts can replace 04378?
There is 1 known substitute for 04378: SCB33410. Substitute compatibility should be verified for your specific system.
What is the NSN for 04378?
04378 is cataloged in the U.S. Government catalog under NSN 5330-00-406-2224. This indicates validated use in U.S. government and defense supply chains.
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