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3-4819-8-423 — BOOT,DUST AND MOISTURE SEAL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

3-4819-8-423: BOOT,DUST AND MOISTURE SEAL.

The BOOT,DUST AND MOISTURE SEAL is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 462 OR COPPER ALLOY 464 OR COPPER ALLOY 360 OVERALL, nut_style: HEXAGON, nut_height: 0.208 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-267-4233, 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
3-4819-8-423
NSN: 5340-01-267-4233
NIINs: 012674233, 012689797
FSC: 5340 — Hardware, Commercial
CAGE: K4340 — AIR-LOG LTD (GBR)
SPECIFICATIONS
materialCOPPER ALLOY 462 OR COPPER ALLOY 464 OR COPPER ALLOY 360 OVERALL
nut_styleHEXAGON
nut_height0.208 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
surface_treatmentNICKEL OVERALL
width_across_flats0.545 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
nominal_thread_size0.312 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch24
nondefinitive_spec/std_data2 TYPE AND 13 STYLE
NSN5340-01-267-4233
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3-4819-8-423 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 DOCUMENT AND CLASSIFICATION: MIL-I-81765/1,TY 1 MIL SPEC SINGLE MATERIAL RESPONSE BODY
•
MATERIAL: PLASTIC POLYOLEFIN BODY
TECHNICAL CHARACTERISTICS
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-I-81765/1,TY 1 MIL SPEC SINGLE MATERIAL RESPONSE BODY
MATERIALPLASTIC POLYOLEFIN BODY
SUBSTITUTES & CROSS-REFERENCES 2
234A742-3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
91302453Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 3-4819-8-423?
3-4819-8-423 is a BOOT,DUST AND MOISTURE SEAL.
What parts can replace 3-4819-8-423?
There are 2 known substitutes for 3-4819-8-423: 234A742-3, 91302453. Substitute compatibility should be verified for your specific system.
What is the NSN for 3-4819-8-423?
3-4819-8-423 is cataloged in the U.S. Government catalog under NSN 5340-01-267-4233. 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.