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MILR8791 — RETAINER,PACKING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MILR8791: RETAINER,PACKING.

The RETAINER,PACKING is a the manufacturer industrial component. Key specifications include 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, cross-sectional_shape_style: SQUARE/RECTANGULAR. This part is cataloged in the U.S.

Government catalog 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
NIINs: 001716762, 004693922, 005674905, 005763206, 005791506, 005805055, 005821536, 005827482, 005827483, 006020862, 006188894, 006188899, 006189462, 006189470, 007295141, 007295142, 007295143, 007295207, 010178910, 010299929, 011392689, 013596972, 013691816, 013691817, 013805186, 013867224, 013938386, 013985402, 014080954, 014083586, 014137807, 014199006, 014229322, 014497945, 014587005, 014784878, 014838077, 015573302
FSC: 5330 — Packing and Gasket Materials
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
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
•
CROSS-SECTIONAL THICKNESS: 0.046 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.138 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SQUARE
•
ANGLE: 25.0 DEGREES MINIMUM AND 35.0 DEGREES MAXIMUM
•
PERIPHERAL DIAMETER: 6.474 INCHES MINIMUM AND 6.478 INCHES MAXIMUM IN
•
DISTANCE BETWEEN ENDS: 0.188 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 6.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.046 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.138 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLESQUARE
ANGLE25.0 DEGREES MINIMUM AND 35.0 DEGREES MAXIMUM
PERIPHERAL DIAMETER6.474 INCHES MINIMUM AND 6.478 INCHES MAXIMUM IN
DISTANCE BETWEEN ENDS0.188 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
CENTER HOLE DIAMETER6.000 INCHES NOMINAL IN
MATERIALPLASTIC TETRAFLUOROETHYLENE OVERALL
JOINT TYPESCARF-BUTT RETAINER
SUBSTITUTES & CROSS-REFERENCES 8
MS35803-437Reference document
Same NSN cross-reference
Reference document — Secondary reference
982236Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
SAE-AS8791Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS28782-64Reference document
Same NSN cross-reference
Reference document — Secondary reference
5330001716762Reference document
Same NSN cross-reference
Reference document — Informative reference only
MS28782Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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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.
What is the NSN for MILR8791?
MILR8791 is cataloged in the U.S. Government catalog under NSN 5330-00-171-6762. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.