PartsTable
Technical Data Sheet
NAS834-178 ✓ 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, POLYETHYLENE (PP), length_under_shoulder: 0.970 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN, open_end_inside_diameter: 1.708 INCHES MINIMUM AND 1.728 INCHES MAXIMUM IN, closed_end_overall_diameter: 1.940 INCHES MINIMUM AND 1.960 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-204-3874, 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
NAS834-178
NSN: 5340-01-204-3874
FSC: 5340
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialPLASTIC, POLYETHYLENE (PP)
length_under_shoulder0.970 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN
open_end_inside_diameter1.708 INCHES MINIMUM AND 1.728 INCHES MAXIMUM IN
closed_end_overall_diameter1.940 INCHES MINIMUM AND 1.960 INCHES MAXIMUM IN
material_document_and_classificationL-P-390, TYPE 1, CLASS L, GRADE 1 FED SPEC 1ST MATERIAL RESPONSE OR L-P-390, TYPE 1, CLASS L, GRADE 2 FED SPEC 2ND MATERIAL RESPONSE
NSN5340-01-204-3874
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: NAS834-178 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: 1.940 INCHES MINIMUM AND 1.960 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION: L-P-390, TYPE 1, CLASS L, GRADE 1 FED SPEC 1ST MATERIAL RESPONSE OR L-P-390, TYPE 1, CLASS L, GRADE 2 FED SPEC 2ND MATERIAL RESPONSE
LENGTH UNDER SHOULDER: 0.970 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN
OPEN END INSIDE DIAMETER: 1.708 INCHES MINIMUM AND 1.728 INCHES MAXIMUM IN
MATERIAL: PLASTIC, POLYETHYLENE (PP)
TECHNICAL CHARACTERISTICS (FLIS)
CLOSED END OVERALL DIAMETER1.940 INCHES MINIMUM AND 1.960 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONL-P-390, TYPE 1, CLASS L, GRADE 1 FED SPEC 1ST MATERIAL RESPONSE OR L-P-390, TYPE 1, CLASS L, GRADE 2 FED SPEC 2ND MATERIAL RESPONSE
LENGTH UNDER SHOULDER0.970 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN
OPEN END INSIDE DIAMETER1.708 INCHES MINIMUM AND 1.728 INCHES MAXIMUM IN
MATERIALPLASTIC, POLYETHYLENE (PP)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
102C1279-1Upgraded Successor
successor cross-reference
successor
8028447Upgraded Successor
successor cross-reference
successor
353122-4Upgraded Successor
successor cross-reference
successor
20Upgraded Successor
2 x Intel Xeon E5-2650 v4 2.2GHz,30M Cache,9.60GT/s QPI,Turbo,HT,12C/24T (105W) Max Mem 2400MHz
successor
5KSM59AS1509TUpgraded Successor
successor cross-reference
successor
AA2MRHCUpgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS834-178?
NAS834-178 is a CAP-PLUG,PROTECTIVE,DUST AND MOI.
What parts can replace NAS834-178?
There are 24 known substitutes for NAS834-178: 102C1279-1, 8028447, 353122-4 and 21 more. Substitute compatibility should be verified for your specific system.
Is NAS834-178 still available?
NAS834-178 is currently cancelled.
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