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40438-1 — SEAL,NONMETALLIC STRIP

✓ Government record, cited
Legrand · ORING SEAL
PRODUCT OVERVIEW

40438-1: SEAL,NONMETALLIC STRIP.

The SEAL,NONMETALLIC STRIP is a Legrand industrial component. Key specifications include material: RUBBER CHLOROPRENE CLASS CR OVERALL, construction: SOLID, aperture_width: 20.375 INCHES NOMINAL IN, aperture_length: 29.125 INCHES NOMINAL IN, style_designator: NON-CIRCULAR, fabrication_method: SOLID. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-300-3313, 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
40438-1
NSN: 5340-00-300-3313
NIINs: 003003313, 004217864
FSC: 5340 — Hardware, Commercial
CAGE: 82577 — RAYTHEON COMPANY DBA RAYTHEON (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR OVERALL
constructionSOLID
aperture_width20.375 INCHES NOMINAL IN
aperture_length29.125 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
fabrication_methodSOLID
cross-sectional_width0.375 INCHES NOMINAL IN
cross-sectional_height0.375 INCHES NOMINAL IN
cross-sectional_shape_styleSQUARE WITH CENTER APERTURE
cross_section_inside_diameter0.156 INCHES NOMINAL IN
material_document_and_classificationMIL-R-6855,GR 50 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5340-00-300-3313
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 40438-1 MFR: Legrand ⚠ 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
•
FIRST LEG HOLE ARRANGEMENT STYLE: ONE HOLE
•
STYLE DESIGNATOR: ANGLE
•
FIRST LEG STYLE: SQUARE
•
MOUNTING HOLE TYPE: PLAIN AND THREADED
TECHNICAL CHARACTERISTICS
FIRST LEG HOLE ARRANGEMENT STYLEONE HOLE
STYLE DESIGNATORANGLE
FIRST LEG STYLESQUARE
MOUNTING HOLE TYPEPLAIN AND THREADED
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 40438-1?
40438-1 is a SEAL,NONMETALLIC STRIP manufactured by Legrand.
What is the NSN for 40438-1?
40438-1 is cataloged in the U.S. Government catalog under NSN 5340-00-300-3313. 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.