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P909 — SEAL ASSEMBLY,SHAFT,SPRING LOADE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

P909: SEAL ASSEMBLY,SHAFT,SPRING LOADE.

SEAL ASSEMBLY,SHAFT,SPRING LOADE. Key specifications include angle: 25.0 DEGREES MINIMUM AND 35.0 DEGREES MAXIMUM, material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL, joint_type: SCARF-BUTT RETAINER, peripheral_diameter: 4.243 INCHES MINIMUM AND 4.247 INCHES MAXIMUM IN, center_hole_diameter: 3.875 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 5330-00-171-5894, 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
P909
NSN: 5330-00-171-5894
NIINs: 001715894, 014221740
FSC: 5330 — Packing and Gasket Materials
CAGE: 11815 — SPS TECHNOLOGIES, LLC DBA CHERRY AEROSPACE DIV DIV CHERRY AEROSPACE (USA)
SPECIFICATIONS
angle25.0 DEGREES MINIMUM AND 35.0 DEGREES MAXIMUM
materialPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
joint_typeSCARF-BUTT RETAINER
peripheral_diameter4.243 INCHES MINIMUM AND 4.247 INCHES MAXIMUM IN
center_hole_diameter3.875 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
attachment_hole_diameter0.031 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
cross-sectional_thickness0.031 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
cross-sectional_shape_styleSQUARE
material_document_and_classificationMIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-171-5894
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: P909 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
•
ATTACHMENT HOLE DIAMETER: 0.031 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
•
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: 4.243 INCHES MINIMUM AND 4.247 INCHES MAXIMUM IN
•
DISTANCE BETWEEN ENDS: 0.093 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
ATTACHMENT HOLE DIAMETER0.031 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
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 DIAMETER4.243 INCHES MINIMUM AND 4.247 INCHES MAXIMUM IN
DISTANCE BETWEEN ENDS0.093 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
CENTER HOLE DIAMETER3.875 INCHES NOMINAL IN
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
SUBSTITUTES & CROSS-REFERENCES 3
MS28782-47Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MS28782Reference document
Same NSN cross-reference
Reference document — Identification reference
SAE-AS8791Reference document
Same NSN cross-reference
Reference document — Secondary 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 P909?
P909 is a SEAL ASSEMBLY,SHAFT,SPRING LOADE.
What parts can replace P909?
There are 3 known substitutes for P909: MS28782-47, MS28782, SAE-AS8791. Substitute compatibility should be verified for your specific system.
What is the NSN for P909?
P909 is cataloged in the U.S. Government catalog under NSN 5330-00-171-5894. 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.