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PartsTable / COMPONENT / 11EHT171
11EHT171 ✓ 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 COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 1.250 INCHES NOMINAL IN, material: STEEL, pilot_height: 0.125 INCHES NOMINAL IN, hole_diameter: 0.438 INCHES NOMINAL IN, body_thickness: 0.063 INCHES NOMINAL IN, inside_diameter: 0.813 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 5340-00-096-5716, 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
11EHT171
NSN: 5340-00-096-5716
FSC: 5340
CAGE: 76040 — MACK TRUCKS INC PARTS OPN (USA)
SPECIFICATIONS
width1.250 INCHES NOMINAL IN
materialSTEEL
pilot_height0.125 INCHES NOMINAL IN
hole_diameter0.438 INCHES NOMINAL IN
body_thickness0.063 INCHES NOMINAL IN
inside_diameter0.813 INCHES NOMINAL IN
features_providedSEALING CAPABILITY
body_outside_radius0.031 INCHES NOMINAL IN
inside_corner_radius0.063 INCHES NOMINAL IN
bolt_circle_hole_quantity1
cross-sectional_shape_styleCIRCULAR RECESS
mounting_opening_shape_styleUNTHREADED HOLE
NSN5340-00-096-5716
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 11EHT171 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
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
BODY THICKNESS: 0.063 INCHES NOMINAL IN
•
WIDTH: 1.250 INCHES NOMINAL IN
•
INSIDE CORNER RADIUS: 0.063 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.438 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.813 INCHES NOMINAL IN
•
PILOT HEIGHT: 0.125 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
BODY THICKNESS0.063 INCHES NOMINAL IN
WIDTH1.250 INCHES NOMINAL IN
INSIDE CORNER RADIUS0.063 INCHES NOMINAL IN
HOLE DIAMETER0.438 INCHES NOMINAL IN
INSIDE DIAMETER0.813 INCHES NOMINAL IN
PILOT HEIGHT0.125 INCHES NOMINAL IN
MATERIALSTEEL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-11415,CLASS E MIL SPEC SINGLE MATERIAL RESPONSE
FEATURES PROVIDEDSEALING CAPABILITY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
729-1Upgraded Successor
successor cross-reference
successor
1726-0750Interchangeable
interchangeable cross-reference
interchangeable
TABLE 61,D 3/4INInterchangeable
interchangeable cross-reference
interchangeable
D-681Interchangeable
interchangeable cross-reference
interchangeable
57C240Interchangeable
interchangeable cross-reference
interchangeable
302114R1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 11EHT171?
11EHT171 is a COVER,ACCESS.
What parts can replace 11EHT171?
There are 19 known substitutes for 11EHT171: 729-1, 1726-0750, TABLE 61,D 3/4IN and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 11EHT171?
11EHT171 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-096-5716. 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