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Technical Data Sheet
PartsTable / COMPONENT / 75-1129
75-1129 ✓ 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 GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER OVERALL, hole_diameter: 0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, outside_diameter: 5.000 INCHES NOMINAL IN, special_features: ONE 0.344 IN. DIA PILOT HOLE ALONG BOLT CIRCLE IN, style_designator: CIRCULAR, aperture_diameter: 2.406 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 5330-00-739-8018, 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
75-1129
NSN: 5330-00-739-8018
FSC: 5330
CAGE: 36024 — LIBBY POWER SYSTEMS, LLC (USA)
SPECIFICATIONS
materialRUBBER OVERALL
hole_diameter0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
outside_diameter5.000 INCHES NOMINAL IN
special_featuresONE 0.344 IN. DIA PILOT HOLE ALONG BOLT CIRCLE IN
style_designatorCIRCULAR
aperture_diameter2.406 INCHES NOMINAL IN
bolt_hole_quantity6
bolt_circle_diameter4.125 INCHES NOMINAL IN
cross-sectional_thickness0.020 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
NSN5330-00-739-8018
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 75-1129 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: SOLID SINGLE OR COMPOSITION
•
MATERIAL: RUBBER OVERALL
•
BOLT CIRCLE DIAMETER: 4.125 INCHES NOMINAL IN
•
CROSS-SECTIONAL THICKNESS: 0.020 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 5.000 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 6
•
HOLE DIAMETER: 0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
MATERIALRUBBER OVERALL
BOLT CIRCLE DIAMETER4.125 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.020 INCHES NOMINAL IN
OUTSIDE DIAMETER5.000 INCHES NOMINAL IN
BOLT HOLE QUANTITY6
SPECIAL FEATURESONE 0.344 IN. DIA PILOT HOLE ALONG BOLT CIRCLE IN
HOLE DIAMETER0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
STYLE DESIGNATORCIRCULAR
APERTURE DIAMETER2.406 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
20028Interchangeable
interchangeable cross-reference
interchangeable
P845FF0-300-21/2D1AInterchangeable
interchangeable cross-reference
interchangeable
2 1-2 1DFFM1-8CBM300Interchangeable
interchangeable cross-reference
interchangeable
P645FF21-2300PSIInterchangeable
interchangeable cross-reference
interchangeable
156Interchangeable
interchangeable cross-reference
interchangeable
H-344/UInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 75-1129?
75-1129 is a GASKET.
What parts can replace 75-1129?
There are 20 known substitutes for 75-1129: 20028, P845FF0-300-21/2D1A, 2 1-2 1DFFM1-8CBM300 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 75-1129?
75-1129 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-739-8018. 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: July 2026