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74908398 — CAP-PLUG,PROTECTIVE,DUST AND MOI

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

74908398: CAP-PLUG,PROTECTIVE,DUST AND MOI.

CAP-PLUG,PROTECTIVE,DUST AND MOI. Key specifications include material: ZINC, special_features: 2 HOLES 0.270 IN. DIA IN.

FLANGE 1.860 IN. C TO C IN, length_under_shoulder: 0.875 INCHES NOMINAL IN, closed_end_overall_diameter: 1.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-117-3129, 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
74908398
NSN: 5340-01-117-3129
FSC: 5340 — Hardware, Commercial
CAGE: 0AHU0 — KALMAR AC INC (USA)
SPECIFICATIONS
materialZINC
special_features2 HOLES 0.270 IN. DIA IN. FLANGE 1.860 IN. C TO C IN
length_under_shoulder0.875 INCHES NOMINAL IN
closed_end_overall_diameter1.500 INCHES NOMINAL IN
NSN5340-01-117-3129
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 74908398 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: 1.500 INCHES NOMINAL IN
•
LENGTH UNDER SHOULDER: 0.875 INCHES NOMINAL IN
•
MATERIAL: ZINC
TECHNICAL CHARACTERISTICS
CLOSED END OVERALL DIAMETER1.500 INCHES NOMINAL IN
LENGTH UNDER SHOULDER0.875 INCHES NOMINAL IN
SPECIAL FEATURES2 HOLES 0.270 IN. DIA IN. FLANGE 1.860 IN. C TO C IN
MATERIALZINC
SUBSTITUTES & CROSS-REFERENCES 1
1811-001Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 74908398?
74908398 is a CAP-PLUG,PROTECTIVE,DUST AND MOI.
What parts can replace 74908398?
There is 1 known substitute for 74908398: 1811-001. Substitute compatibility should be verified for your specific system.
What is the NSN for 74908398?
74908398 is cataloged in the U.S. Government catalog under NSN 5340-01-117-3129. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.