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Technical Data Sheet
PartsTable / COMPONENT / 1DD273
1DD273 ✓ 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

The PLUG,EXPANSION is a the manufacturer industrial component. Key specifications include width: 1.240 INCHES NOMINAL IN, length: 3.380 INCHES NOMINAL IN, material: STEEL, body_radius: 0.500 INCHES NOMINAL IN, corner_radius: 0.440 INCHES NOMINAL IN, hole_diameter: 0.406 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 5340-00-255-4423, 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
1DD273
NSN: 5340-00-255-4423
FSC: 5340
CAGE: 45152 — OSHKOSH CORP (USA)
SPECIFICATIONS
width1.240 INCHES NOMINAL IN
length3.380 INCHES NOMINAL IN
materialSTEEL
body_radius0.500 INCHES NOMINAL IN
corner_radius0.440 INCHES NOMINAL IN
hole_diameter0.406 INCHES NOMINAL IN
body_thickness0.230 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
special_featuresWEAPON SYSTEM ESSENTIAL
securing_device_typeTHREADED FASTENER
peripheral_shape_styleIRREGULAR, TWO HOLES
end_item_identification2320-01-097-0260 HEMTT - HEAVY EXPANDED MOBILITY TACTICAL TRUCK.; NSN 2320-01-304-2277 AND 2320-01-304-2278 PLS (PALLETIZED LOADING SYSTEM)
cross-sectional_shape_styleFLAT
NSN5340-00-255-4423
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1DD273 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
•
STYLE DESIGNATOR: CONCAVE
•
MATERIAL: STEEL CORROSION RESISTING
•
OUTSIDE DIAMETER: 2.5000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORCONCAVE
MATERIALSTEEL CORROSION RESISTING
OUTSIDE DIAMETER2.5000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
8927579Upgraded Successor
successor cross-reference
successor
5117344Upgraded Successor
successor cross-reference
successor
1DD273Upgraded Successor
successor cross-reference
successor
5139989Interchangeable
interchangeable cross-reference
interchangeable
A20447Interchangeable
interchangeable cross-reference
interchangeable
4730PL0943847Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1DD273?
1DD273 is a PLUG,EXPANSION.
What parts can replace 1DD273?
There are 7 known substitutes for 1DD273: 8927579, 5117344, 1DD273 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1DD273?
1DD273 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-255-4423. 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