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DSC173-9 — PLUG,PROTECTIVE,DUST AND MOISTUR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

DSC173-9: PLUG,PROTECTIVE,DUST AND MOISTUR.

PLUG,PROTECTIVE,DUST AND MOISTUR. Key specifications include material: PLASTIC, POLYETHYLENE (PP), design_type: FRICTION, overall_diameter: 1.370 INCHES NOMINAL IN, special_features: COLOR BLACK, features_provided: BEVELED SEAT, opening_inside_diameter_for_which_designed: 1.040 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-256-0503, 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
DSC173-9
NSN: 5340-01-256-0503
FSC: 5340 — Hardware, Commercial
CAGE: 71867 — DE HAVILLAND AIRCRAFT OF CANADA LIMITED (CAN)
SPECIFICATIONS
materialPLASTIC, POLYETHYLENE (PP)
design_typeFRICTION
overall_diameter1.370 INCHES NOMINAL IN
special_featuresCOLOR BLACK
features_providedBEVELED SEAT
opening_inside_diameter_for_which_designed1.040 INCHES NOMINAL IN
NSN5340-01-256-0503
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: DSC173-9 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: 1.370 INCHES NOMINAL IN
•
FEATURES PROVIDED: BEVELED SEAT
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 1.040 INCHES NOMINAL IN
•
MATERIAL: PLASTIC, POLYETHYLENE (PP)
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER1.370 INCHES NOMINAL IN
FEATURES PROVIDEDBEVELED SEAT
OPENING INSIDE DIAMETER FOR WHICH DESIGNED1.040 INCHES NOMINAL IN
SPECIAL FEATURESCOLOR BLACK
MATERIALPLASTIC, POLYETHYLENE (PP)
SUBSTITUTES & CROSS-REFERENCES 2
BPF-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
52C7651-8Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is DSC173-9?
DSC173-9 is a PLUG,PROTECTIVE,DUST AND MOISTUR.
What parts can replace DSC173-9?
There are 2 known substitutes for DSC173-9: BPF-1, 52C7651-8. Substitute compatibility should be verified for your specific system.
What is the NSN for DSC173-9?
DSC173-9 is cataloged in the U.S. Government catalog under NSN 5340-01-256-0503. 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.