PartsTable
Technical Data Sheet
PartsTable / O-RING / BL738-43
BL738-43 ✓ 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 O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, hardness_rating: 70.0 SHORE DUROMETER A NOMINAL, outside_diameter: 8.012 INCHES NOMINAL IN, center_hole_diameter: 7.704 INCHES MINIMUM AND 7.764 INCHES MAXIMUM IN, elongation_percentage: 150 MAXIMUM, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-290-9392, 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
BL738-43
NSN: 5331-00-290-9392
FSC: 5331 — O-RING
CAGE: 08484 — BREEZE-EASTERN LLC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
hardness_rating70.0 SHORE DUROMETER A NOMINAL
outside_diameter8.012 INCHES NOMINAL IN
center_hole_diameter7.704 INCHES MINIMUM AND 7.764 INCHES MAXIMUM IN
elongation_percentage150 MAXIMUM
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
NSN5331-00-290-9392
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: BL738-43 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: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
ELONGATION PERCENTAGE: 150 MAXIMUM
•
HARDNESS RATING: 70.0 SHORE DUROMETER A NOMINAL
•
CENTER HOLE DIAMETER: 7.704 INCHES MINIMUM AND 7.764 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 8.012 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
ELONGATION PERCENTAGE150 MAXIMUM
HARDNESS RATING70.0 SHORE DUROMETER A NOMINAL
CENTER HOLE DIAMETER7.704 INCHES MINIMUM AND 7.764 INCHES MAXIMUM IN
OUTSIDE DIAMETER8.012 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
11-265Interchangeable
interchangeable cross-reference
interchangeable
1-11265Interchangeable
interchangeable cross-reference
interchangeable
110-000265-201Interchangeable
interchangeable cross-reference
interchangeable
2005-SInterchangeable
interchangeable cross-reference
interchangeable
TPS000Interchangeable
interchangeable cross-reference
interchangeable
4-12-47-42Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BL738-43?
BL738-43 is a O-RING.
What parts can replace BL738-43?
There are 16 known substitutes for BL738-43: 11-265, 1-11265, 110-000265-201 and 13 more. Substitute compatibility should be verified for your specific system.
Is BL738-43 still available?
BL738-43 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026