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4187940 — SEAL,NONMETALLIC SPECIAL SHAPED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4187940: SEAL,NONMETALLIC SPECIAL SHAPED.

SEAL,NONMETALLIC SPECIAL SHAPED. Key specifications include material: RUBBER SILICONE CLASS Q OVERALL, construction: SOLIDSOLID, style_designator: CIRCULAR, aperture_diameter: 23.500 INCHES MINIMUM AND 23.500 INCHES MINIMUM AND 23.750 INCHES MAXIMUM23.750 INCHES MAXIMUM IN, fabrication_method: SOLIDSOLID, cross-sectional_width: 1.000 INCHES NOMINAL1.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-041-4802, 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
4187940
NSN: 5330-01-041-4802
FSC: 5330 — Packing and Gasket Materials
CAGE: 80212 — BAE SYSTEMS LAND & ARMAMENTS L.P. (USA)
SPECIFICATIONS
materialRUBBER SILICONE CLASS Q OVERALL
constructionSOLIDSOLID
style_designatorCIRCULAR
aperture_diameter23.500 INCHES MINIMUM AND 23.500 INCHES MINIMUM AND 23.750 INCHES MAXIMUM23.750 INCHES MAXIMUM IN
fabrication_methodSOLIDSOLID
cross-sectional_width1.000 INCHES NOMINAL1.000 INCHES NOMINAL IN
cross-sectional_height0.660 INCHES NOMINAL0.660 INCHES NOMINAL IN
supplementary_features2OCT00 ITEM REVIEWED UNDER GIRDER PROJECT. FG NON-CONCUR CANCELLATION ACTION
cross-sectional_thickness0.047 INCHES MINIMUM AND 0.047 INCHES MINIMUM AND 0.094 INCHES MAXIMUM0.094 INCHES MAXIMUM IN
cross-sectional_shape_styleHOLLOW BULB-OFFSETHOLLOW BULB-OFFSET
material_document_and_classificationAMS 3347 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5330-01-041-4802
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4187940 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 THICKNESS: 0.047 INCHES MINIMUM AND 0.047 INCHES MINIMUM AND 0.094 INCHES MAXIMUM0.094 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.660 INCHES NOMINAL0.660 INCHES NOMINAL IN
•
CROSS-SECTIONAL WIDTH: 1.000 INCHES NOMINAL1.000 INCHES NOMINAL IN
•
SUPPLEMENTARY FEATURES: 2OCT00 ITEM REVIEWED UNDER GIRDER PROJECT. FG NON-CONCUR CANCELLATION ACTION
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 3347 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: HOLLOW BULB-OFFSETHOLLOW BULB-OFFSET
•
APERTURE DIAMETER: 23.500 INCHES MINIMUM AND 23.500 INCHES MINIMUM AND 23.750 INCHES MAXIMUM23.750 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.047 INCHES MINIMUM AND 0.047 INCHES MINIMUM AND 0.094 INCHES MAXIMUM0.094 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.660 INCHES NOMINAL0.660 INCHES NOMINAL IN
CROSS-SECTIONAL WIDTH1.000 INCHES NOMINAL1.000 INCHES NOMINAL IN
SUPPLEMENTARY FEATURES2OCT00 ITEM REVIEWED UNDER GIRDER PROJECT. FG NON-CONCUR CANCELLATION ACTION
STYLE DESIGNATORCIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 3347 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLEHOLLOW BULB-OFFSETHOLLOW BULB-OFFSET
APERTURE DIAMETER23.500 INCHES MINIMUM AND 23.500 INCHES MINIMUM AND 23.750 INCHES MAXIMUM23.750 INCHES MAXIMUM IN
MATERIALRUBBER SILICONE CLASS Q OVERALL
FABRICATION METHODSOLIDSOLID
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
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 4187940?
4187940 is a SEAL,NONMETALLIC SPECIAL SHAPED.
What is the NSN for 4187940?
4187940 is cataloged in the U.S. Government catalog under NSN 5330-01-041-4802. 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.