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7021-54-240-4128 — STANDOFF,PLAIN,SNAP-IN

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

7021-54-240-4128: STANDOFF,PLAIN,SNAP-IN.

The STANDOFF,PLAIN,SNAP-IN is a the manufacturer industrial component. Key specifications include material: GLASS FIBER OVERALL, special_features: MATERIAL:CLOTH, GLASS, EPOXY RESIN PREIMPREGNATED SS9578-007 TYPE I CLASS 2, end_item_identification: TIP ASSY;EWS WING RH ASSY;3CH60SX AIRFRAME, part_name_assigned_by_controlling_agency: (INAVY)STAND-OFF. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-563-8853, 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
7021-54-240-4128
NSN: 5340-01-563-8853
FSC: 5340 — Hardware, Commercial
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialGLASS FIBER OVERALL
special_featuresMATERIAL:CLOTH, GLASS, EPOXY RESIN PREIMPREGNATED SS9578-007 TYPE I CLASS 2
end_item_identificationTIP ASSY;EWS WING RH ASSY;3CH60SX AIRFRAME
part_name_assigned_by_controlling_agency(INAVY)STAND-OFF
NSN5340-01-563-8853
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 7021-54-240-4128 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
•
MATERIAL: GLASS FIBER OVERALL
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESMATERIAL:CLOTH, GLASS, EPOXY RESIN PREIMPREGNATED SS9578-007 TYPE I CLASS 2
PART NAME ASSIGNED BY CONTROLLING AGENCY(INAVY)STAND-OFF
END ITEM IDENTIFICATIONTIP ASSY;EWS WING RH ASSY;3CH60SX AIRFRAME
MATERIALGLASS FIBER OVERALL
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 7021-54-240-4128?
7021-54-240-4128 is a STANDOFF,PLAIN,SNAP-IN.
What is the NSN for 7021-54-240-4128?
7021-54-240-4128 is cataloged in the U.S. Government catalog under NSN 5340-01-563-8853. 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.