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8682-003-378 — PACKING ASSEMBLY

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

8682-003-378: PACKING ASSEMBLY.

The PACKING ASSEMBLY is a the manufacturer industrial component. Key specifications include height: 1.872 INCHES NOMINAL IN, material: GRAPHITE OVERALL, inside_diameter: 1.250 INCHES NOMINAL IN, outside_diameter: 1.875 INCHES NOMINAL IN, end_item_identification: VELAN 6 IN BOLTED BONNET STOP CHECK VALVE IN, cross-sectional_shape_style: SQUARE/RECTANGULAR OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-529-9850, 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
8682-003-378
NSN: 5330-01-529-9850
FSC: 5330 — Packing and Gasket Materials
CAGE: 57574 — VELAN VALVE CORP. (USA)
SPECIFICATIONS
height1.872 INCHES NOMINAL IN
materialGRAPHITE OVERALL
inside_diameter1.250 INCHES NOMINAL IN
outside_diameter1.875 INCHES NOMINAL IN
end_item_identificationVELAN 6 IN BOLTED BONNET STOP CHECK VALVE IN
cross-sectional_shape_styleSQUARE/RECTANGULAR OVERALL
material_document_and_classificationMIL-P-24503 B, TY 2, CL 2, GRD 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyPACKING, INTERMEDIATE RINGS
NSN5330-01-529-9850
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 8682-003-378 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
•
OUTSIDE DIAMETER: 1.875 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-P-24503 B, TY 2, CL 2, GRD 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SQUARE/RECTANGULAR OVERALL
•
INSIDE DIAMETER: 1.250 INCHES NOMINAL IN
•
HEIGHT: 1.872 INCHES NOMINAL IN
•
MATERIAL: GRAPHITE OVERALL
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER1.875 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-24503 B, TY 2, CL 2, GRD 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLESQUARE/RECTANGULAR OVERALL
INSIDE DIAMETER1.250 INCHES NOMINAL IN
HEIGHT1.872 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYPACKING, INTERMEDIATE RINGS
END ITEM IDENTIFICATIONVELAN 6 IN BOLTED BONNET STOP CHECK VALVE IN
MATERIALGRAPHITE OVERALL
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES 1
P3-43949-G01 NOTE6 INTERMEDIATEReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 8682-003-378?
8682-003-378 is a PACKING ASSEMBLY.
What parts can replace 8682-003-378?
There is 1 known substitute for 8682-003-378: P3-43949-G01 NOTE6 INTERMEDIATE. Substitute compatibility should be verified for your specific system.
What is the NSN for 8682-003-378?
8682-003-378 is cataloged in the U.S. Government catalog under NSN 5330-01-529-9850. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.