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425718703875-375 — PACKING,PREFORMED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

425718703875-375: PACKING,PREFORMED.

The PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING, peripheral_diameter: 4.250 INCHES NOMINAL IN, center_hole_diameter: 3.872 INCHES NOMINAL IN, cross-sectional_height: 0.375 INCHES NOMINAL IN, cross-sectional_shape_style: U WITH O-RING, material_document_and_classification: N4674 FSC-30781 MFR REF SINGLE MATERIAL RESPONSE SPRING. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-229-8093, 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
425718703875-375
NSN: 5330-01-229-8093
FSC: 5330 — Packing and Gasket Materials
CAGE: 30781 — PARKER-HANNIFIN CORPORATION DIV ENGINEERED POLYMER SYSTEMS DIVISION (EPS) (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING
peripheral_diameter4.250 INCHES NOMINAL IN
center_hole_diameter3.872 INCHES NOMINAL IN
cross-sectional_height0.375 INCHES NOMINAL IN
cross-sectional_shape_styleU WITH O-RING
material_document_and_classificationN4674 FSC-30781 MFR REF SINGLE MATERIAL RESPONSE SPRING
NSN5330-01-229-8093
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 425718703875-375 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 HEIGHT: 0.375 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: N4274 FSC-30781 MFR REF SINGLE MATERIAL RESPONSE PACKING
•
CROSS-SECTIONAL SHAPE STYLE: U WITH O-RING
•
PERIPHERAL DIAMETER: 4.250 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 3.872 INCHES NOMINAL IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.375 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONN4274 FSC-30781 MFR REF SINGLE MATERIAL RESPONSE PACKING
MATERIAL DOCUMENT AND CLASSIFICATIONN4674 FSC-30781 MFR REF SINGLE MATERIAL RESPONSE SPRING
CROSS-SECTIONAL SHAPE STYLEU WITH O-RING
PERIPHERAL DIAMETER4.250 INCHES NOMINAL IN
CENTER HOLE DIAMETER3.872 INCHES NOMINAL IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SPRING
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 6
1870-3875-XN253 3-2Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
6538C407-1Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
1870-3875-XN253Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
425718703875Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
1870-3875-375-XN2533-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
427418703875-37 5Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 425718703875-375?
425718703875-375 is a PACKING,PREFORMED.
What parts can replace 425718703875-375?
There are 6 known substitutes for 425718703875-375: 1870-3875-XN253 3-2, 6538C407-1, 1870-3875-XN253 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 425718703875-375?
425718703875-375 is cataloged in the U.S. Government catalog under NSN 5330-01-229-8093. 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.