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Technical Data Sheet
PartsTable / COMPONENT / SM71-116
SM71-116 ✓ 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

CAP-PLUG,PROTECTIVE,DUST AND MOI. Key specifications include material: PLASTIC, length_under_shoulder: 0.625 INCHES NOMINAL IN, open_end_inside_diameter: 1.000 INCHES NOMINAL IN, closed_end_overall_diameter: 1.156 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-721-7921, 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
SM71-116
NSN: 5340-00-721-7921
FSC: 5340
CAGE: 01417 — GENERAL DYNAMICS LAND SYSTEMS INC. (USA)
SPECIFICATIONS
materialPLASTIC
length_under_shoulder0.625 INCHES NOMINAL IN
open_end_inside_diameter1.000 INCHES NOMINAL IN
closed_end_overall_diameter1.156 INCHES NOMINAL IN
NSN5340-00-721-7921
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SM71-116 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
•
CLOSED END OVERALL DIAMETER: 1.156 INCHES NOMINAL IN
•
LENGTH UNDER SHOULDER: 0.625 INCHES NOMINAL IN
•
OPEN END INSIDE DIAMETER: 1.000 INCHES NOMINAL IN
•
MATERIAL: PLASTIC
TECHNICAL CHARACTERISTICS (FLIS)
CLOSED END OVERALL DIAMETER1.156 INCHES NOMINAL IN
LENGTH UNDER SHOULDER0.625 INCHES NOMINAL IN
OPEN END INSIDE DIAMETER1.000 INCHES NOMINAL IN
MATERIALPLASTIC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
EP16Upgraded Successor
successor cross-reference
successor
6840363-16Upgraded Successor
successor cross-reference
successor
EP42SInterchangeable
interchangeable cross-reference
interchangeable
6472382Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SM71-116?
SM71-116 is a CAP-PLUG,PROTECTIVE,DUST AND MOI.
What parts can replace SM71-116?
There are 4 known substitutes for SM71-116: EP16, 6840363-16, EP42S and 1 more. Substitute compatibility should be verified for your specific system.
Is SM71-116 still available?
SM71-116 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026