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71991PC9 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

71991PC9: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC, outside_diameter: 0.755 INCHES NOMINAL IN, center_hole_diameter: 0.544 INCHES MINIMUM AND 0.554 INCHES MAXIMUM IN, cross-sectional_height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-033-1203, 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
71991PC9
NSN: 5331-01-033-1203
FSC: 5331 — O-ring
CAGE: 75545 — LAWLER MANUFACTURING COMPANY, INC. (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC
outside_diameter0.755 INCHES NOMINAL IN
center_hole_diameter0.544 INCHES MINIMUM AND 0.554 INCHES MAXIMUM IN
cross-sectional_height0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
NSN5331-01-033-1203
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 71991PC9 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 HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.755 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 0.544 INCHES MINIMUM AND 0.554 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.755 INCHES NOMINAL IN
CENTER HOLE DIAMETER0.544 INCHES MINIMUM AND 0.554 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC
SUBSTITUTES & CROSS-REFERENCES 3
AS568-113IDS86865Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
4113-59Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
2912-01Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 71991PC9?
71991PC9 is a O-RING.
What parts can replace 71991PC9?
There are 3 known substitutes for 71991PC9: AS568-113IDS86865, 4113-59, 2912-01. Substitute compatibility should be verified for your specific system.
What is the NSN for 71991PC9?
71991PC9 is cataloged in the U.S. Government catalog under NSN 5331-01-033-1203. 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.