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128779 ✓ Verified by PartsTable
Hama · 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 PLUG,EXPANSION is a Hama industrial component. Key specifications include radius: 2.688 INCHES NOMINAL IN, material: STEEL, outside_diameter: 1.745 INCHES MINIMUM AND 1.755 INCHES MAXIMUM IN, style_designator: CONCAVE, material_thickness: 0.083 INCHES NOMINAL IN, material_document_and_classification: 66, 1008 TO 1022 FED STD SINGLE MATERIAL RESPONSE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-054-1410, 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
128779
NSN: 5340-00-054-1410
FSC: 5340
CAGE: 29510 — KOMATSU AMERICAN INTL CO (USA)
SPECIFICATIONS
radius2.688 INCHES NOMINAL IN
materialSTEEL
outside_diameter1.745 INCHES MINIMUM AND 1.755 INCHES MAXIMUM IN
style_designatorCONCAVE
material_thickness0.083 INCHES NOMINAL IN
material_document_and_classification66, 1008 TO 1022 FED STD SINGLE MATERIAL RESPONSE
NSN5340-00-054-1410
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 128779 MFR: Hama ⚠ 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
•
OUTSIDE DIAMETER: 1.745 INCHES MINIMUM AND 1.755 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.083 INCHES NOMINAL IN
•
RADIUS: 2.688 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CONCAVE
•
MATERIAL: STEEL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66, 1008 TO 1022 FED STD SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER1.745 INCHES MINIMUM AND 1.755 INCHES MAXIMUM IN
MATERIAL THICKNESS0.083 INCHES NOMINAL IN
RADIUS2.688 INCHES NOMINAL IN
STYLE DESIGNATORCONCAVE
MATERIALSTEEL
MATERIAL DOCUMENT AND CLASSIFICATION66, 1008 TO 1022 FED STD SINGLE MATERIAL RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 32
215TTFS29078Upgraded Successor
successor cross-reference
successor
910010Upgraded Successor
successor cross-reference
successor
5702Interchangeable
IBM PCI-X Dual Channel U320 Scsi Adapter
interchangeable
S702Interchangeable
interchangeable cross-reference
interchangeable
1948694Interchangeable
interchangeable cross-reference
interchangeable
0910333-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 128779?
128779 is a PLUG,EXPANSION manufactured by Hama.
What parts can replace 128779?
There are 32 known substitutes for 128779: 215TTFS29078, 910010, 5702 and 29 more. Substitute compatibility should be verified for your specific system.
Is 128779 still available?
128779 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026