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Technical Data Sheet
D-1555 ITEM 7 ✓ 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, drive_type: SCREW SLOT, design_type: THREADED, thread_class: 2A A, overall_diameter: 0.656 INCHES NOMINAL IN, features_provided: SHOULDER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-151-6038, 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
D-1555 ITEM 7
NSN: 5340-01-151-6038
FSC: 5340
CAGE: 55650 — DOWN EAST, INC. (USA)
SPECIFICATIONS
materialPLASTIC
drive_typeSCREW SLOT
design_typeTHREADED
thread_class2A A
overall_diameter0.656 INCHES NOMINAL IN
features_providedSHOULDER
material_document_and_classificationL-P-390, TYPE 1, CLASS L, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE
thread_size_and_series/type_designator1/2-20 UNF
opening_inside_diameter_for_which_designed0.393 INCHES MINIMUM AND 0.397 INCHES MAXIMUM IN
NSN5340-01-151-6038
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: D-1555 ITEM 7 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
THREAD CLASS: 2A A
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 1/2-20 UNF
DRIVE TYPE: SCREW SLOT
MATERIAL DOCUMENT AND CLASSIFICATION: L-P-390, TYPE 1, CLASS L, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 0.393 INCHES MINIMUM AND 0.397 INCHES MAXIMUM IN
OVERALL DIAMETER: 0.656 INCHES NOMINAL IN
MATERIAL: PLASTIC
FEATURES PROVIDED: SHOULDER
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2A A
THREAD SIZE AND SERIES/TYPE DESIGNATOR1/2-20 UNF
DRIVE TYPESCREW SLOT
MATERIAL DOCUMENT AND CLASSIFICATIONL-P-390, TYPE 1, CLASS L, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE
OPENING INSIDE DIAMETER FOR WHICH DESIGNED0.393 INCHES MINIMUM AND 0.397 INCHES MAXIMUM IN
OVERALL DIAMETER0.656 INCHES NOMINAL IN
MATERIALPLASTIC
FEATURES PROVIDEDSHOULDER
DESIGN TYPETHREADED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
580A132Interchangeable
interchangeable cross-reference
interchangeable
672-0081-00Interchangeable
interchangeable cross-reference
interchangeable
29422Interchangeable
interchangeable cross-reference
interchangeable
C3MInterchangeable
interchangeable cross-reference
interchangeable
53212Interchangeable
interchangeable cross-reference
interchangeable
2410 1-3/4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D-1555 ITEM 7?
D-1555 ITEM 7 is a PLUG,PROTECTIVE,DUST AND MOISTUR.
What parts can replace D-1555 ITEM 7?
There are 9 known substitutes for D-1555 ITEM 7: 580A132, 672-0081-00, 29422 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for D-1555 ITEM 7?
D-1555 ITEM 7 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-151-6038. This indicates validated use in U.S. government and defense supply chains.
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