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103684H — BELLOWS,PROTECTION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

103684H: BELLOWS,PROTECTION.

The BELLOWS,PROTECTION is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC, neutral_length: 2.219 INCHES NOMINAL IN, end_inside_length: 0.188 INCHES NOMINAL IN, end_outside_length: 0.188 INCHES NOMINAL IN, thickness_at_both_ends: 0.109 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN, thickness_between_ends: 0.035 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-371-4140, 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
103684H
NSN: 5340-00-371-4140
FSC: 5340 — Hardware, Commercial
CAGE: 92679 — NAVISTAR INTL CORP MELROSE PARK ENGINE PLANT LOCATION /MELROSE PARK/ (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC
neutral_length2.219 INCHES NOMINAL IN
end_inside_length0.188 INCHES NOMINAL IN
end_outside_length0.188 INCHES NOMINAL IN
thickness_at_both_ends0.109 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
thickness_between_ends0.035 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
large_end_inside_diameter1.062 INCHES NOMINAL IN
small_end_inside_diameter0.344 INCHES NOMINAL IN
large_end_outside_diameter1.312 INCHES NOMINAL IN
small_end_outside_diameter0.562 INCHES NOMINAL IN
NSN5340-00-371-4140
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 103684H 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
•
SMALL END INSIDE DIAMETER: 0.344 INCHES NOMINAL IN
•
LARGE END INSIDE DIAMETER: 1.062 INCHES NOMINAL IN
•
LARGE END OUTSIDE DIAMETER: 1.312 INCHES NOMINAL IN
•
SMALL END OUTSIDE DIAMETER: 0.562 INCHES NOMINAL IN
•
NEUTRAL LENGTH: 2.219 INCHES NOMINAL IN
•
END OUTSIDE LENGTH: 0.188 INCHES NOMINAL IN
•
THICKNESS AT BOTH ENDS: 0.109 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
•
THICKNESS BETWEEN ENDS: 0.035 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SMALL END INSIDE DIAMETER0.344 INCHES NOMINAL IN
LARGE END INSIDE DIAMETER1.062 INCHES NOMINAL IN
LARGE END OUTSIDE DIAMETER1.312 INCHES NOMINAL IN
SMALL END OUTSIDE DIAMETER0.562 INCHES NOMINAL IN
NEUTRAL LENGTH2.219 INCHES NOMINAL IN
END OUTSIDE LENGTH0.188 INCHES NOMINAL IN
THICKNESS AT BOTH ENDS0.109 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
THICKNESS BETWEEN ENDS0.035 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
END INSIDE LENGTH0.188 INCHES NOMINAL 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

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 103684H?
103684H is a BELLOWS,PROTECTION.
What is the NSN for 103684H?
103684H is cataloged in the U.S. Government catalog under NSN 5340-00-371-4140. 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.