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Technical Data Sheet
30031-1 PC 55 ✓ Verified by PartsTable
· ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE CLASS Q, temp_rating: -70.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF, hardness_rating: 50.0 SHORE DUROMETER A NOMINAL, outside_diameter: 1.181 INCHES MINIMUM AND 1.217 INCHES MAXIMUM IN, center_hole_diameter: 0.921 INCHES NOMINAL IN, cross-sectional_height: 0.139 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-218-8845, 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
30031-1 PC 55
NSN: 5331-01-218-8845
FSC: 5331 — O-RING
CAGE: 16658 — BIACH INDUSTRIES, INC. (USA)
SPECIFICATIONS
materialRUBBER SILICONE CLASS Q
temp_rating-70.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
hardness_rating50.0 SHORE DUROMETER A NOMINAL
outside_diameter1.181 INCHES MINIMUM AND 1.217 INCHES MAXIMUM IN
center_hole_diameter0.921 INCHES NOMINAL IN
cross-sectional_height0.139 INCHES NOMINAL IN
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsAS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS AND CERTIFIED FREE FROM MERCURY CONTAMINATION
NSN5331-01-218-8845
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 30031-1 PC 55 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
HARDNESS RATING: 50.0 SHORE DUROMETER A NOMINAL
CRITICALITY CODE JUSTIFICATION: ZZZY
CENTER HOLE DIAMETER: 0.921 INCHES NOMINAL IN
MATERIAL: RUBBER SILICONE CLASS Q
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: AS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS AND CERTIFIED FREE FROM MERCURY CONTAMINATION
TEMP RATING: -70.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
OUTSIDE DIAMETER: 1.181 INCHES MINIMUM AND 1.217 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT: 0.139 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HARDNESS RATING50.0 SHORE DUROMETER A NOMINAL
CRITICALITY CODE JUSTIFICATIONZZZY
CENTER HOLE DIAMETER0.921 INCHES NOMINAL IN
MATERIALRUBBER SILICONE CLASS Q
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSAS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS AND CERTIFIED FREE FROM MERCURY CONTAMINATION
TEMP RATING-70.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
OUTSIDE DIAMETER1.181 INCHES MINIMUM AND 1.217 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.139 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
331Interchangeable
interchangeable cross-reference
interchangeable
2213Interchangeable
interchangeable cross-reference
interchangeable
N-YGN-34Interchangeable
interchangeable cross-reference
interchangeable
S3145Interchangeable
interchangeable cross-reference
interchangeable
64Interchangeable
interchangeable cross-reference
interchangeable
0901725-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 30031-1 PC 55?
30031-1 PC 55 is a O-RING.
What parts can replace 30031-1 PC 55?
There are 19 known substitutes for 30031-1 PC 55: 331, 2213, N-YGN-34 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 30031-1 PC 55?
30031-1 PC 55 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-218-8845. This indicates validated use in U.S. government and defense supply chains.
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