PartsTable
Technical Data Sheet
12-1026 ✓ Verified by PartsTable
· MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

COVER,ENGINE POPPET VALVE ROCKER. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, inclosure_type: ENCASED, drive_shaft_type: MACHINE KEYWAY, operation_method: POWERED, discharge_pressure: 500.0 COMPREHENSIVE PROCUREMENT GUIDELINE - CONSTRUCTION PRODUCTS - CEMENT AND CONCRETE CONTAINING CENOSPHERES, drive_shaft_length: 1.562 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-708-7770, 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
MRO MRO_GENERAL 12-1026
NSN: 5331-00-708-7770
FSC: 5331 — O-RING
CAGE: 13520 — DONALDSON COMPANY, INC. (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
inclosure_typeENCASED
drive_shaft_typeMACHINE KEYWAY
operation_methodPOWERED
discharge_pressure500.0 COMPREHENSIVE PROCUREMENT GUIDELINE - CONSTRUCTION PRODUCTS - CEMENT AND CONCRETE CONTAINING CENOSPHERES
drive_shaft_length1.562 INCHES NOMINAL IN
rotary_pump_designGEAR
nominal_thread_size0.138 INCHES IN
center_hole_diameter1.724 INCHES MINIMUM AND 1.744 INCHES MAXIMUM IN
drive_connection_typeCLOSE COUPLED
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
intake_connection_typeTHREADED INTERNAL
NSN5331-00-708-7770
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12-1026 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
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CENTER HOLE DIAMETER: 1.724 INCHES MINIMUM AND 1.744 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CENTER HOLE DIAMETER1.724 INCHES MINIMUM AND 1.744 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
1512CSP5Interchangeable
interchangeable cross-reference
interchangeable
171026Interchangeable
interchangeable cross-reference
interchangeable
VP4871Interchangeable
interchangeable cross-reference
interchangeable
12-1026Interchangeable
interchangeable cross-reference
interchangeable
673-0729-000Interchangeable
interchangeable cross-reference
interchangeable
1PS99Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12-1026?
12-1026 is a COVER,ENGINE POPPET VALVE ROCKER. It is classified as a MRO (MRO_GENERAL).
What parts can replace 12-1026?
There are 13 known substitutes for 12-1026: 1512CSP5, 171026, VP4871 and 10 more. Substitute compatibility should be verified for your specific system.
Is 12-1026 still available?
12-1026 is currently cancelled.
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