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2146259 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2146259: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: STEEL COMP 1020, design_type: THREADED, thread_class: 3B, overall_height: 1.562 INCHES NOMINAL IN, width_across_flats: 0.500 INCHES NOMINAL IN, inside_diameter_length: 1.314 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-643-6164, 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
2146259
NSN: 5340-01-643-6164
FSC: 5340 — Hardware, Commercial
CAGE: 44114 — BAE SYSTEMS LAND & ARMAMENTS L.P. (USA)
SPECIFICATIONS
materialSTEEL COMP 1020
design_typeTHREADED
thread_class3B
overall_height1.562 INCHES NOMINAL IN
width_across_flats0.500 INCHES NOMINAL IN
inside_diameter_length1.314 INCHES NOMINAL IN
round_cap_outside_surface_conditionSMOOTH
part_name_assigned_by_controlling_agencyCAP
connector_nominal_thread_size_for_which_designed1.312 INCHES IN
NSN5340-01-643-6164
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2146259 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
•
WIDTH ACROSS FLATS: 0.500 INCHES NOMINAL IN
•
DESIGN TYPE: THREADED
•
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED: 1.312 INCHES IN
•
THREAD CLASS: 3B
•
MATERIAL: STEEL COMP 1020
•
INSIDE DIAMETER LENGTH: 1.314 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.562 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.500 INCHES NOMINAL IN
DESIGN TYPETHREADED
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED1.312 INCHES IN
PART NAME ASSIGNED BY CONTROLLING AGENCYCAP
THREAD CLASS3B
MATERIALSTEEL COMP 1020
INSIDE DIAMETER LENGTH1.314 INCHES NOMINAL IN
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 2146259?
2146259 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What is the NSN for 2146259?
2146259 is cataloged in the U.S. Government catalog under NSN 5340-01-643-6164. 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.