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B4009-1 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

B4009-1: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: PLASTIC, design_type: FRICTION, overall_diameter: 7.0000 INCHES NOMINAL IN, special_features: THE ITEM IS MADE FROM ANTI-STATIC POLYETHYLENE, round_cap_outside_surface_condition: SMOOTH. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-394-8502, 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
B4009-1
NSN: 5340-01-394-8502
FSC: 5340 — Hardware, Commercial
CAGE: 58382 — COLVIN PACKAGING PRODUCTS INC (USA)
SPECIFICATIONS
materialPLASTIC
design_typeFRICTION
overall_diameter7.0000 INCHES NOMINAL IN
special_featuresTHE ITEM IS MADE FROM ANTI-STATIC POLYETHYLENE
round_cap_outside_surface_conditionSMOOTH
NSN5340-01-394-8502
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B4009-1 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: 7.0000 INCHES NOMINAL IN
•
MATERIAL: PLASTIC
•
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER7.0000 INCHES NOMINAL IN
SPECIAL FEATURESTHE ITEM IS MADE FROM ANTI-STATIC POLYETHYLENE
MATERIALPLASTIC
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 1
B5472Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 B4009-1?
B4009-1 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace B4009-1?
There is 1 known substitute for B4009-1: B5472. Substitute compatibility should be verified for your specific system.
What is the NSN for B4009-1?
B4009-1 is cataloged in the U.S. Government catalog under NSN 5340-01-394-8502. 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.