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55651 ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include length: 0.562 INCHES NOMINAL IN, material: STEEL COMP 1095, body_style: STRAIGHT SHAPE, EXTERNAL COUPLING, shell_type: SOLID, insert_size: 0.448 IN MIN 0.468 INMAX IN, thread_class: 2A A. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-255-0315, 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
55651
NSN: 5330-00-255-0315
FSC: 5330
CAGE: 80072 — H20 TANK INC U S MOTORS DIV (USA)
SPECIFICATIONS
length0.562 INCHES NOMINAL IN
materialSTEEL COMP 1095
body_styleSTRAIGHT SHAPE, EXTERNAL COUPLING
shell_typeSOLID
insert_size0.448 IN MIN 0.468 INMAX IN
thread_class2A A
hole_diameter0.281 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width2.125 INCHES NOMINAL IN
terminal_typeCRIMP SINGLE MATING END SINGLE CONTACT GROUPING
thread_length0.750 INCHES NOMINAL IN
overall_length1.281 INCHES NOMINAL IN
shell_materialCOPPER ALLOY
NSN5330-00-255-0315
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 55651 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 SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
STYLE DESIGNATOR: NON-CIRCULAR
•
BOLT HOLE QUANTITY: 2
•
MATERIAL DOCUMENT AND CLASSIFICATION: HH-P-96 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE CORNER RADIUS: 0.250 INCHES NOMINAL IN
•
MATERIAL: PAPER AND GLUE AND GLYCERIN OVERALL
•
APERTURE DIAMETER: 0.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
STYLE DESIGNATORNON-CIRCULAR
BOLT HOLE QUANTITY2
MATERIAL DOCUMENT AND CLASSIFICATIONHH-P-96 FED SPEC ALL MATERIAL RESPONSES OVERALL
OUTSIDE CORNER RADIUS0.250 INCHES NOMINAL IN
OVERALL WIDTH2.125 INCHES NOMINAL IN
MATERIALPAPER AND GLUE AND GLYCERIN OVERALL
APERTURE DIAMETER0.625 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER1.625 INCHES NOMINAL IN
HOLE DIAMETER0.281 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
1191-6CNX562Interchangeable
interchangeable cross-reference
interchangeable
1191-6CN9Interchangeable
interchangeable cross-reference
interchangeable
5340002913492Interchangeable
interchangeable cross-reference
interchangeable
SM-B-187794Interchangeable
interchangeable cross-reference
interchangeable
55651Interchangeable
interchangeable cross-reference
interchangeable
B-8-TA-1-6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 55651?
55651 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 55651?
There are 22 known substitutes for 55651: 1191-6CNX562, 1191-6CN9, 5340002913492 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 55651?
55651 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-255-0315. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026