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52A3751 — PLUG ASSY,DUST

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

52A3751: PLUG ASSY,DUST.

The PLUG ASSY,DUST is a the manufacturer industrial component. Key specifications include special_features: WEAPON SYSTEM ESSENTIAL, criticality_code_justification: FEAT. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-021-3057, 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
52A3751
NSN: 5340-00-021-3057
NIINs: 000213057, 006122454
FSC: 5340 — Hardware, Commercial
CAGE: 11243 — COSMODYNE, LLC DBA COSMODYNE LLC (USA)
SPECIFICATIONS
special_featuresWEAPON SYSTEM ESSENTIAL
criticality_code_justificationFEAT
NSN5340-00-021-3057
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 52A3751 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: THREADED
•
OVERALL DIAMETER: 1.8745 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN
•
DRIVE TYPE: SERRATED
•
THREAD PITCH DIAMETERS: +1.7160 TO 1.7395 INCHES IN
•
THREAD CLASS: 2A A
•
MATERIAL: PLASTIC, POLYETHYLENE (PP)
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 1.875-4 ACME C
TECHNICAL CHARACTERISTICS
DESIGN TYPETHREADED
OVERALL DIAMETER1.8745 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN
DRIVE TYPESERRATED
THREAD PITCH DIAMETERS+1.7160 TO 1.7395 INCHES IN
SPECIAL FEATURESREQUIRES SPECIAL TESTING AND PACKAGING FOR OXYGEN AND NITROGEN SERVICE
THREAD CLASS2A A
MATERIALPLASTIC, POLYETHYLENE (PP)
THREAD SIZE AND SERIES/TYPE DESIGNATOR1.875-4 ACME C
SUBSTITUTES & CROSS-REFERENCES 1
160001-P133Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 52A3751?
52A3751 is a PLUG ASSY,DUST.
What parts can replace 52A3751?
There is 1 known substitute for 52A3751: 160001-P133. Substitute compatibility should be verified for your specific system.
What is the NSN for 52A3751?
52A3751 is cataloged in the U.S. Government catalog under NSN 5340-00-021-3057. 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.