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2740137 — RETAINER,SEAL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2740137: RETAINER,SEAL.

The RETAINER,SEAL is a the manufacturer industrial component. Key specifications include construction: SOLID, special_features: NOMINAL OVERALL DIAMETER 5.250 INCHES; CENTER HOLE 2.625 INCHES FROM OUTER EDGE IN, end_item_identification: END ITEM NSN: 3990-01-444-6174 BITUM DISTRIBUTOR; ENGINEERING MISSION MODULE (EMM) USED ON THE PALLETIZED LOADING SYSTEM, part_name_assigned_by_controlling_agency: RETAINER, GASKET, 6 INCH DISC VALVE IN. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-576-9420, 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
2740137
NSN: 5331-00-576-9420
NIINs: 005769420, 015413854
FSC: 5331 — O-ring
CAGE: 78385 — MEGGITT TROY INC (USA)
SPECIFICATIONS
constructionSOLID
special_featuresNOMINAL OVERALL DIAMETER 5.250 INCHES; CENTER HOLE 2.625 INCHES FROM OUTER EDGE IN
end_item_identificationEND ITEM NSN: 3990-01-444-6174 BITUM DISTRIBUTOR; ENGINEERING MISSION MODULE (EMM) USED ON THE PALLETIZED LOADING SYSTEM
part_name_assigned_by_controlling_agencyRETAINER, GASKET, 6 INCH DISC VALVE IN
NSN5331-00-576-9420
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2740137 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: 0.059 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 0.495 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.059 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.495 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2740137?
2740137 is a RETAINER,SEAL.
What is the NSN for 2740137?
2740137 is cataloged in the U.S. Government catalog under NSN 5331-00-576-9420. 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.