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MS28782-42 — RETAINER,PACKING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MS28782-42: RETAINER,PACKING.

The RETAINER,PACKING is a the manufacturer industrial component. Key specifications include angle: 25.0 DEGREES MINIMUM AND 35.0 DEGREES MAXIMUM, material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL, joint_type: SCARF-BUTT RETAINER, peripheral_diameter: 3.620 INCHES NOMINAL IN, center_hole_diameter: 3.250 INCHES NOMINAL IN, distance_between_ends: 0.093 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-171-5778, 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
MS28782-42
NSN: 5330-00-171-5778
NIINs: 001715778, 015494577
FSC: 5330 — Packing and Gasket Materials
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
angle25.0 DEGREES MINIMUM AND 35.0 DEGREES MAXIMUM
materialPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
joint_typeSCARF-BUTT RETAINER
peripheral_diameter3.620 INCHES NOMINAL IN
center_hole_diameter3.250 INCHES NOMINAL IN
distance_between_ends0.093 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
cross-sectional_height0.093 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN
end_item_identificationVALVE, BALL, 2.5 IPS.
cross-sectional_thickness0.031 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
cross-sectional_shape_styleSQUARE
departure_from_cited_documentCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
criticality_code_justificationZZZW
NSN5330-00-171-5778
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS28782-42 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: 0.031 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.093 INCHES MINIMUM AND 0.108 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: 3.618 INCHES MINIMUM AND 3.622 INCHES MAXIMUM IN
•
DISTANCE BETWEEN ENDS: 0.093 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 3.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.031 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.093 INCHES MINIMUM AND 0.108 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 DIAMETER3.618 INCHES MINIMUM AND 3.622 INCHES MAXIMUM IN
DISTANCE BETWEEN ENDS0.093 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
CENTER HOLE DIAMETER3.250 INCHES NOMINAL IN
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
JOINT TYPESCARF-BUTT RETAINER
SUBSTITUTES & CROSS-REFERENCES 7
SAE-AS8791Reference document
Same NSN cross-reference
Reference document — Secondary reference
721-7069909-45Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MS27872-42Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
H861-1505-45Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MS28782Reference document
Same NSN cross-reference
Reference document — Identification reference
25573PC21Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS28782-42?
MS28782-42 is a RETAINER,PACKING.
What parts can replace MS28782-42?
There are 7 known substitutes for MS28782-42: SAE-AS8791, 721-7069909-45, MS27872-42 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS28782-42?
MS28782-42 is cataloged in the U.S. Government catalog under NSN 5330-00-171-5778. 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.