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12321104 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

12321104: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: STEEL, design_type: FRICTION, overall_diameter: 6.000 INCHES NOMINAL IN, surface_treatment: PHOSPHATE, round_cap_outside_surface_condition: SMOOTH, opening_inside_diameter_for_which_designed: 4.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-180-3525, 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
12321104
NSN: 5340-01-180-3525
FSC: 5340 — Hardware, Commercial
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL
design_typeFRICTION
overall_diameter6.000 INCHES NOMINAL IN
surface_treatmentPHOSPHATE
round_cap_outside_surface_conditionSMOOTH
opening_inside_diameter_for_which_designed4.500 INCHES NOMINAL IN
NSN5340-01-180-3525
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12321104 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
•
DESIGN TYPE: FRICTION
•
OVERALL DIAMETER: 6.000 INCHES NOMINAL IN
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 4.500 INCHES NOMINAL IN
•
SURFACE TREATMENT: PHOSPHATE
•
MATERIAL: STEEL
•
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER6.000 INCHES NOMINAL IN
OPENING INSIDE DIAMETER FOR WHICH DESIGNED4.500 INCHES NOMINAL IN
SPECIAL FEATURES6 EQUALLY SPACED HOLES 0.281 IN.DIA.; 0.310 IN. THK.; MATERIAL IS PER ASTM A575,1010-1020; OR QQ-S-637,1213-1215,OR 1117; SURFACE TREATMENT IS PERMIL-P-16232,TYPE M,CLASS 3,0.0002 TO 0.0004 IN. THK. IN
SURFACE TREATMENTPHOSPHATE
MATERIALSTEEL
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12321104?
12321104 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What is the NSN for 12321104?
12321104 is cataloged in the U.S. Government catalog under NSN 5340-01-180-3525. 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.