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SI 412 — PLUG,PROTECTIVE,DUST AND MOISTUR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

SI 412: PLUG,PROTECTIVE,DUST AND MOISTUR.

PLUG,PROTECTIVE,DUST AND MOISTUR. Key specifications include material: PLASTIC, POLYETHYLENE (PP), design_type: FRICTION, overall_diameter: 0.969 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN, features_provided: BEVELED SEAT AND SHOULDER, opening_inside_diameter_for_which_designed: 0.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-350-0397, 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
SI 412
NSN: 5340-01-350-0397
FSC: 5340 — Hardware, Commercial
CAGE: 23540 — NIAGARA PLASTICS L.L.C. (USA)
SPECIFICATIONS
materialPLASTIC, POLYETHYLENE (PP)
design_typeFRICTION
overall_diameter0.969 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN
features_providedBEVELED SEAT AND SHOULDER
opening_inside_diameter_for_which_designed0.750 INCHES NOMINAL IN
NSN5340-01-350-0397
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SI 412 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
•
DESIGN TYPE: FRICTION
•
OVERALL DIAMETER: 0.969 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN
•
FEATURES PROVIDED: BEVELED SEAT AND SHOULDER
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 0.750 INCHES NOMINAL IN
•
MATERIAL: PLASTIC, POLYETHYLENE (PP)
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER0.969 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN
FEATURES PROVIDEDBEVELED SEAT AND SHOULDER
OPENING INSIDE DIAMETER FOR WHICH DESIGNED0.750 INCHES NOMINAL IN
MATERIALPLASTIC, POLYETHYLENE (PP)
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
09A162-5Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is SI 412?
SI 412 is a PLUG,PROTECTIVE,DUST AND MOISTUR.
What parts can replace SI 412?
There is 1 known substitute for SI 412: 09A162-5. Substitute compatibility should be verified for your specific system.
What is the NSN for SI 412?
SI 412 is cataloged in the U.S. Government catalog under NSN 5340-01-350-0397. 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.