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291.11 — RETAINER,GOVERNOR WEIGHT ASSEMBL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

291.11: RETAINER,GOVERNOR WEIGHT ASSEMBL.

RETAINER,GOVERNOR WEIGHT ASSEMBL. Key specifications include material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL, seat_angle: 37.0 DEGREES FIRST END, shank_height: 0.156 INCHES NOMINAL IN, thread_class: 3A FIRST END A, overall_height: 0.250 INCHES NOMINAL IN, connection_type: THREADED EXTERNAL TUBE FIRST END. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-012-3521, 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
291.11
NSN: 5330-00-012-3521
NIINs: 000123521, 008695896, 010200887, 011610211, 012866946, 014469699, 016792426
FSC: 5330 — Packing and Gasket Materials
CAGE: 94830 — PELLERIN MILNOR CORPORATION (USA)
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
seat_angle37.0 DEGREES FIRST END
shank_height0.156 INCHES NOMINAL IN
thread_class3A FIRST END A
overall_height0.250 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL TUBE FIRST END
inside_diameter0.050 INCHES NOMINAL IN
connection_styleFLARED (TUBE) FIRST END
outside_diameter0.188 INCHES NOMINAL IN
special_features1.5 MM W/EYE MM
style_designatorSHOULDER
thread_directionRIGHT-HAND FIRST END
NSN5330-00-012-3521
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 291.11 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 NOMINAL IN
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-12803,NO. +3464-A MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 4.875 INCHES NOMINAL IN
•
APERTURE DIAMETER: 4.500 INCHES NOMINAL IN
•
MATERIAL: PAPER AND RUBBER POLYISOPRENE NATURAL CLASS NR OR RUBBER POLYISOPRENE SYNTHETIC CLASS IR OVERALL
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.031 INCHES NOMINAL IN
STYLE DESIGNATORCIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-12803,NO. +3464-A MIL SPEC ALL MATERIAL RESPONSES OVERALL
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER4.875 INCHES NOMINAL IN
APERTURE DIAMETER4.500 INCHES NOMINAL IN
MATERIALPAPER AND RUBBER POLYISOPRENE NATURAL CLASS NR OR RUBBER POLYISOPRENE SYNTHETIC CLASS IR OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 291.11?
291.11 is a RETAINER,GOVERNOR WEIGHT ASSEMBL.
What is the NSN for 291.11?
291.11 is cataloged in the U.S. Government catalog under NSN 5330-00-012-3521. This indicates validated use in U.S. government and defense supply chains.
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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.