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Technical Data Sheet
MILR8791 ✓ 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 RETAINER,PACKING is a the manufacturer industrial component. Key specifications include color: WHITE, material: PLASTIC OVERALL, peripheral_diameter: 33.242 INCHES NOMINAL IN, center_hole_diameter: 32.740 INCHES NOMINAL IN, cross-sectional_height: 0.095 INCHES NOMINAL IN, end_item_identification: SEAL, PROP SHAFT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-171-6762, 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
MILR8791
NSN: 5330-00-171-6762
FSC: 5330
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
colorWHITE
materialPLASTIC OVERALL
peripheral_diameter33.242 INCHES NOMINAL IN
center_hole_diameter32.740 INCHES NOMINAL IN
cross-sectional_height0.095 INCHES NOMINAL IN
end_item_identificationSEAL, PROP SHAFT
cross-sectional_shape_styleSQUARE/RECTANGULAR
part_name_assigned_by_controlling_agencyRETAINER, BACKUP
NSN5330-00-171-6762
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MILR8791 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
CENTER HOLE DIAMETER: 6.000 INCHES NOMINAL IN
PERIPHERAL DIAMETER: 6.474 INCHES MINIMUM AND 6.478 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLE: SQUARE
DISTANCE BETWEEN ENDS: 0.188 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: PLASTIC TETRAFLUOROETHYLENE OVERALL
CROSS-SECTIONAL HEIGHT: 0.138 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
JOINT TYPE: SCARF-BUTT RETAINER
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER6.000 INCHES NOMINAL IN
PERIPHERAL DIAMETER6.474 INCHES MINIMUM AND 6.478 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLESQUARE
DISTANCE BETWEEN ENDS0.188 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALPLASTIC TETRAFLUOROETHYLENE OVERALL
CROSS-SECTIONAL HEIGHT0.138 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
JOINT TYPESCARF-BUTT RETAINER
ANGLE25.0 DEGREES MINIMUM AND 35.0 DEGREES MAXIMUM
CROSS-SECTIONAL THICKNESS0.046 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
MS35803-437Interchangeable
Same NIIN cross-reference
interchangeable
982236Interchangeable
Same NIIN cross-reference
interchangeable
SAE-AS8791Interchangeable
Same NIIN cross-reference
interchangeable
MS28782-64Interchangeable
Same NIIN cross-reference
interchangeable
5330001716762Interchangeable
Same NIIN cross-reference
interchangeable
MS28782Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MILR8791?
MILR8791 is a RETAINER,PACKING.
What parts can replace MILR8791?
There are 8 known substitutes for MILR8791: MS35803-437, 982236, SAE-AS8791 and 5 more. Substitute compatibility should be verified for your specific system.
Is MILR8791 still available?
MILR8791 is currently cancelled.
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