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7T0188 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

7T0188: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM, center_hole_diameter: 0.270 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN, cross-sectional_height: 0.056 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN, material_document_and_classification: AMS 7276 ASSN STD SINGLE MATERIAL RESPONSE. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-387-6907, 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
7T0188
NSN: 5331-01-387-6907
FSC: 5331 — O-ring
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialRUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM
center_hole_diameter0.270 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN
cross-sectional_height0.056 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
material_document_and_classificationAMS 7276 ASSN STD SINGLE MATERIAL RESPONSE
NSN5331-01-387-6907
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 7T0188 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: 0.056 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 7276 ASSN STD SINGLE MATERIAL RESPONSE
•
CENTER HOLE DIAMETER: 0.270 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN
•
MATERIAL: RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.056 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 7276 ASSN STD SINGLE MATERIAL RESPONSE
CENTER HOLE DIAMETER0.270 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN
MATERIALRUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM
OTHER ITEMS IN FSC 5331 — O-ring
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5331-00-001-1971 5331-00-001-1979 5331-00-001-3904 5331-00-001-3905 5331-00-001-3906 5331-00-001-3908 5331-00-001-3923 5331-00-001-3924
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7T0188?
7T0188 is a O-RING.
What is the NSN for 7T0188?
7T0188 is cataloged in the U.S. Government catalog under NSN 5331-01-387-6907. 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.