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12505287 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

PLUG,PROTECTIVE,DUST AND MOISTUR. Key specifications include material: PLASTIC AND RUBBER SYNTHETIC, drive_type: HEX HEAD, design_type: THREADED, overall_diameter: 0.687 INCHES NOMINAL IN, special_features: APPURTENANCE PLUG; 0.700 INCHES IN LENGTH NOMINAL; INCLUDES SEALING O-RING IN, length_under_shoulder: 0.410 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-567-6558, 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
12505287
NSN: 5340-01-567-6558
FSC: 5340
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialPLASTIC AND RUBBER SYNTHETIC
drive_typeHEX HEAD
design_typeTHREADED
overall_diameter0.687 INCHES NOMINAL IN
special_featuresAPPURTENANCE PLUG; 0.700 INCHES IN LENGTH NOMINAL; INCLUDES SEALING O-RING IN
length_under_shoulder0.410 INCHES NOMINAL IN
end_item_identificationTRUCK, CARGO 5 TON MODEL M1983A1E1; HIGH-MOBILITY ARTILLERY ROCKET SYSTEM (HIMARS)
open_end_inside_diameter1.060 INCHES NOMINAL IN
closed_end_overall_diameter0.310 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyPLUG
NSN5340-01-567-6558
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12505287 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
•
DRIVE TYPE: HEX HEAD
•
OVERALL DIAMETER: 0.687 INCHES NOMINAL IN
•
DESIGN TYPE: THREADED
•
MATERIAL: PLASTIC AND RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS (FLIS)
DRIVE TYPEHEX HEAD
OVERALL DIAMETER0.687 INCHES NOMINAL IN
DESIGN TYPETHREADED
SPECIAL FEATURESAPPURTENANCE PLUG; 0.700 INCHES IN LENGTH NOMINAL; INCLUDES SEALING O-RING IN
END ITEM IDENTIFICATIONTRUCK, CARGO 5 TON MODEL M1983A1E1; HIGH-MOBILITY ARTILLERY ROCKET SYSTEM (HIMARS)
MATERIALPLASTIC AND RUBBER SYNTHETIC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
BL-4Upgraded Successor
successor cross-reference
successor
12505287Upgraded Successor
successor cross-reference
successor
12505287-100Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12505287?
12505287 is a PLUG,PROTECTIVE,DUST AND MOISTUR.
What parts can replace 12505287?
There are 3 known substitutes for 12505287: BL-4, 12505287, 12505287-100. Substitute compatibility should be verified for your specific system.
What is the NSN for 12505287?
12505287 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-567-6558. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026