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Technical Data Sheet
PartsTable / COMPONENT / 755S
755S ✓ 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 PLUG,EXPANSION is a the manufacturer industrial component. Key specifications include radius: 4.750 INCHES NOMINAL IN, material: STEEL COMP 1010, outside_diameter: 2.875 INCHES NOMINAL IN, style_designator: CONCAVE, material_thickness: 0.083 INCHES NOMINAL IN, material_document_and_classification: ASTM A108 ASSN STD SINGLE MATERIAL RESPONSE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-054-1421, 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
755S
NSN: 5340-00-054-1421
FSC: 5340
CAGE: 90346 — GIBSON MFG CORP (USA)
SPECIFICATIONS
radius4.750 INCHES NOMINAL IN
materialSTEEL COMP 1010
outside_diameter2.875 INCHES NOMINAL IN
style_designatorCONCAVE
material_thickness0.083 INCHES NOMINAL IN
material_document_and_classificationASTM A108 ASSN STD SINGLE MATERIAL RESPONSE
NSN5340-00-054-1421
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 755S 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
•
STYLE DESIGNATOR: CONCAVE
•
OUTSIDE DIAMETER: 2.875 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1010
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A108 ASSN STD SINGLE MATERIAL RESPONSE
•
RADIUS: 4.750 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.083 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORCONCAVE
OUTSIDE DIAMETER2.875 INCHES NOMINAL IN
MATERIALSTEEL COMP 1010
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A108 ASSN STD SINGLE MATERIAL RESPONSE
RADIUS4.750 INCHES NOMINAL IN
MATERIAL THICKNESS0.083 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
402-05Upgraded Successor
successor cross-reference
successor
40200Upgraded Successor
successor cross-reference
successor
40200 ITEM 4Upgraded Successor
successor cross-reference
successor
172642Interchangeable
interchangeable cross-reference
interchangeable
CVCPICInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 755S?
755S is a PLUG,EXPANSION.
What parts can replace 755S?
There are 5 known substitutes for 755S: 402-05, 40200, 40200 ITEM 4 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 755S?
755S is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-054-1421. 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