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68BC54 — BELLOWS,PROTECTION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

68BC54: BELLOWS,PROTECTION.

The BELLOWS,PROTECTION is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC, neutral_length: 3.125 INCHES NOMINAL IN, fsc_application_data: CHAMBER,BRAKE,VEHICULAR, thickness_at_both_ends: 0.125 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN, large_end_outside_length: 0.172 INCHES NOMINAL IN, small_end_outside_length: 0.562 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-734-8050, 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
68BC54
NSN: 5340-00-734-8050
FSC: 5340 — Hardware, Commercial
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC
neutral_length3.125 INCHES NOMINAL IN
fsc_application_dataCHAMBER,BRAKE,VEHICULAR
thickness_at_both_ends0.125 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
large_end_outside_length0.172 INCHES NOMINAL IN
small_end_outside_length0.562 INCHES NOMINAL IN
large_end_outside_diameter3.750 INCHES NOMINAL IN
small_end_outside_diameter1.125 INCHES NOMINAL IN
NSN5340-00-734-8050
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 68BC54 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
•
FSC APPLICATION DATA: CHAMBER,BRAKE,VEHICULAR
•
LARGE END OUTSIDE LENGTH: 0.172 INCHES NOMINAL IN
•
LARGE END OUTSIDE DIAMETER: 3.750 INCHES NOMINAL IN
•
SMALL END OUTSIDE DIAMETER: 1.125 INCHES NOMINAL IN
•
SMALL END OUTSIDE LENGTH: 0.562 INCHES NOMINAL IN
•
NEUTRAL LENGTH: 3.125 INCHES NOMINAL IN
•
THICKNESS AT BOTH ENDS: 0.125 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATACHAMBER,BRAKE,VEHICULAR
LARGE END OUTSIDE LENGTH0.172 INCHES NOMINAL IN
LARGE END OUTSIDE DIAMETER3.750 INCHES NOMINAL IN
SMALL END OUTSIDE DIAMETER1.125 INCHES NOMINAL IN
SMALL END OUTSIDE LENGTH0.562 INCHES NOMINAL IN
NEUTRAL LENGTH3.125 INCHES NOMINAL IN
THICKNESS AT BOTH ENDS0.125 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC
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 5
564M1Reference document
Same NSN cross-reference
Reference document — Secondary reference
36431CReference document
Same NSN cross-reference
Reference document — Secondary reference
10A1682Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
7348050Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2046785Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 68BC54?
68BC54 is a BELLOWS,PROTECTION.
What parts can replace 68BC54?
There are 5 known substitutes for 68BC54: 564M1, 36431C, 10A1682 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 68BC54?
68BC54 is cataloged in the U.S. Government catalog under NSN 5340-00-734-8050. 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.