PartsTable
Technical Data Sheet
638-05-508-0008 ✓ 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 SEAL,PLAIN is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT, seal_width: 8.000 INCHES NOMINAL IN, construction: SOLID, outside_diameter: 80.2 MILLIMETERS NOMINAL MM, surface_treatment: PLASTIC CASE, housing_bore_diameter: 80.000 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 5330-01-255-0136, 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
638-05-508-0008
NSN: 5330-01-255-0136
FSC: 5330
CAGE: 00874 — RENOLD INC DIV AJAX (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
seal_width8.000 INCHES NOMINAL IN
constructionSOLID
outside_diameter80.2 MILLIMETERS NOMINAL MM
surface_treatmentPLASTIC CASE
housing_bore_diameter80.000 INCHES NOMINAL IN
accommodated_shaft_diameter55.000 INCHES NOMINAL IN
cross-sectional_shape_styleSINGLE LIP
NSN5330-01-255-0136
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 638-05-508-0008 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: 80.2 MILLIMETERS NOMINAL MM
SEAL WIDTH: 8.000 INCHES NOMINAL IN
CONSTRUCTION: SOLID
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
SURFACE TREATMENT: PLASTIC CASE
CROSS-SECTIONAL SHAPE STYLE: SINGLE LIP
HOUSING BORE DIAMETER: 80.000 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER: 55.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER80.2 MILLIMETERS NOMINAL MM
SEAL WIDTH8.000 INCHES NOMINAL IN
CONSTRUCTIONSOLID
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
SURFACE TREATMENTPLASTIC CASE
CROSS-SECTIONAL SHAPE STYLESINGLE LIP
HOUSING BORE DIAMETER80.000 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER55.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
6050Interchangeable
interchangeable cross-reference
interchangeable
12Z3042-56Interchangeable
interchangeable cross-reference
interchangeable
1124Interchangeable
interchangeable cross-reference
interchangeable
21640Interchangeable
interchangeable cross-reference
interchangeable
1168879Interchangeable
interchangeable cross-reference
interchangeable
3686489Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 638-05-508-0008?
638-05-508-0008 is a SEAL,PLAIN.
What parts can replace 638-05-508-0008?
There are 7 known substitutes for 638-05-508-0008: 6050, 12Z3042-56, 1124 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 638-05-508-0008?
638-05-508-0008 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-255-0136. This indicates validated use in U.S. government and defense supply chains.
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