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A51B10004-26 — Technical Data Sheet

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— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

SEAL,NONMETALLIC SPECIAL SHAPED. Key specifications include material: PLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER) JACKET, temp_rating: -54.0 CELSIUS AND -54.0 CELSIUS AND 177.0 CELSIUS177.0 CELSIUS DEGC, construction: ONE-PIECEONE-PIECE, special_features: LENGTH IS 10 FEETLENGTH IS 10 FEET FT, cross-sectional_width: 1.000 INCHES NOMINAL1.000 INCHES NOMINAL IN, cross-sectional_height: 0.370 INCHES NOMINAL0.370 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 5330-01-228-9553, 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
A51B10004-26
NSN: 5330-01-228-9553
FSC: 5330
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialPLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER) JACKET
temp_rating-54.0 CELSIUS AND -54.0 CELSIUS AND 177.0 CELSIUS177.0 CELSIUS DEGC
constructionONE-PIECEONE-PIECE
special_featuresLENGTH IS 10 FEETLENGTH IS 10 FEET FT
cross-sectional_width1.000 INCHES NOMINAL1.000 INCHES NOMINAL IN
cross-sectional_height0.370 INCHES NOMINAL0.370 INCHES NOMINAL IN
cross-sectional_thickness0.060 INCHES NOMINAL0.060 INCHES NOMINAL IN
cross-sectional_shape_styleHOLLOW BULBHOLLOW BULB
cross_section_inside_diameter0.270 INCHES NOMINAL0.270 INCHES NOMINAL IN
material_document_and_classificationZZ-R-765 CLASS 11B GRADE 50 FED SPEC SINGLE MATERIAL RESPONSE CORE
NSN5330-01-228-9553
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A51B10004-26 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 SHAPE STYLE: HOLLOW BULBHOLLOW BULB
•
CROSS SECTION INSIDE DIAMETER: 0.270 INCHES NOMINAL0.270 INCHES NOMINAL IN
•
CROSS-SECTIONAL HEIGHT: 0.370 INCHES NOMINAL0.370 INCHES NOMINAL IN
•
CROSS-SECTIONAL WIDTH: 1.000 INCHES NOMINAL1.000 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ZZ-R-765 CLASS 11B GRADE 50 FED SPEC SINGLE MATERIAL RESPONSE CORE
•
MATERIAL: PLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER) JACKET
•
CONSTRUCTION: ONE-PIECEONE-PIECE
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESLENGTH IS 10 FEETLENGTH IS 10 FEET FT
CROSS-SECTIONAL SHAPE STYLEHOLLOW BULBHOLLOW BULB
CROSS SECTION INSIDE DIAMETER0.270 INCHES NOMINAL0.270 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.370 INCHES NOMINAL0.370 INCHES NOMINAL IN
CROSS-SECTIONAL WIDTH1.000 INCHES NOMINAL1.000 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONZZ-R-765 CLASS 11B GRADE 50 FED SPEC SINGLE MATERIAL RESPONSE CORE
MATERIALPLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER) JACKET
CONSTRUCTIONONE-PIECEONE-PIECE
TEMP RATING-54.0 CELSIUS AND -54.0 CELSIUS AND 177.0 CELSIUS177.0 CELSIUS DEGC
MATERIALRUBBER SILICONE CLASS Q CORE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
SM-B-933863Interchangeable
interchangeable cross-reference
interchangeable
71A2391Interchangeable
interchangeable cross-reference
interchangeable
7093Interchangeable
interchangeable cross-reference
interchangeable
NASM91531Interchangeable
interchangeable cross-reference
interchangeable
180-356Interchangeable
interchangeable cross-reference
interchangeable
856829Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A51B10004-26?
A51B10004-26 is a SEAL,NONMETALLIC SPECIAL SHAPED.
What parts can replace A51B10004-26?
There are 10 known substitutes for A51B10004-26: SM-B-933863, 71A2391, 7093 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A51B10004-26?
A51B10004-26 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-228-9553. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026