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5787T21 — PAD,CUSHIONING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

5787T21: PAD,CUSHIONING.

The PAD,CUSHIONING is a the manufacturer industrial component. Key specifications include shape: SQUARE, width: 24.000 INCHES NOMINAL IN, length: 24.000 INCHES NOMINAL IN, material: RUBBER SILICONE CLASS Q OVERALL, thickness: 0.250 INCHES NOMINAL IN, usage_design: AIRCRAFT. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-658-0343, 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
5787T21
NSN: 5340-01-658-0343
FSC: 5340 — Hardware, Commercial
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
shapeSQUARE
width24.000 INCHES NOMINAL IN
length24.000 INCHES NOMINAL IN
materialRUBBER SILICONE CLASS Q OVERALL
thickness0.250 INCHES NOMINAL IN
usage_designAIRCRAFT
special_featuresHIGH-TEMPERATURE SILICONE RUBBER
end_item_identificationKC-46A SUPPORT EQUIPMENT A
part_name_assigned_by_controlling_agencyPAD, CUSHIONING
NSN5340-01-658-0343
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5787T21 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
•
LENGTH: 24.000 INCHES NOMINAL IN
•
USAGE DESIGN: AIRCRAFT
•
SHAPE: SQUARE
•
WIDTH: 24.000 INCHES NOMINAL IN
•
MATERIAL: RUBBER SILICONE CLASS Q OVERALL
TECHNICAL CHARACTERISTICS
LENGTH24.000 INCHES NOMINAL IN
USAGE DESIGNAIRCRAFT
SHAPESQUARE
SPECIAL FEATURESHIGH-TEMPERATURE SILICONE RUBBER
WIDTH24.000 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYPAD, CUSHIONING
END ITEM IDENTIFICATIONKC-46A SUPPORT EQUIPMENT A
MATERIALRUBBER SILICONE CLASS Q OVERALL
THICKNESS0.250 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5787T21?
5787T21 is a PAD,CUSHIONING.
What is the NSN for 5787T21?
5787T21 is cataloged in the U.S. Government catalog under NSN 5340-01-658-0343. 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.