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Technical Data Sheet
NAS1831B3B12 ✓ 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

The STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 0.745 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN, style_designator: LEFT INTERNAL AND RIGHT INTERNAL THREADS, width_across_flats: 0.184 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN, cross-sectional_shape: HEXAGON, specification/standard_data: 80205-NAS1831 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-217-2842, 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
NAS1831B3B12
NSN: 5340-01-217-2842
FSC: 5340
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
length0.745 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN
style_designatorLEFT INTERNAL AND RIGHT INTERNAL THREADS
width_across_flats0.184 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
cross-sectional_shapeHEXAGON
specification/standard_data80205-NAS1831 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN5340-01-217-2842
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: NAS1831B3B12 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
CROSS-SECTIONAL SHAPE: HEXAGON
STYLE DESIGNATOR: LEFT INTERNAL AND RIGHT INTERNAL THREADS
SPECIFICATION/STANDARD DATA: 80205-NAS1831 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
WIDTH ACROSS FLATS: 0.184 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
LENGTH: 0.745 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPEHEXAGON
STYLE DESIGNATORLEFT INTERNAL AND RIGHT INTERNAL THREADS
SPECIFICATION/STANDARD DATA80205-NAS1831 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
WIDTH ACROSS FLATS0.184 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
LENGTH0.745 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
9155Upgraded Successor
successor cross-reference
successor
905-5Upgraded Successor
successor cross-reference
successor
532353-628Upgraded Successor
successor cross-reference
successor
SS6951-0632-2.500-01Upgraded Successor
successor cross-reference
successor
0N664167Upgraded Successor
successor cross-reference
successor
VC9055Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS1831B3B12?
NAS1831B3B12 is a STANDOFF,THREADED,SPACING.
What parts can replace NAS1831B3B12?
There are 22 known substitutes for NAS1831B3B12: 9155, 905-5, 532353-628 and 19 more. Substitute compatibility should be verified for your specific system.
Is NAS1831B3B12 still available?
NAS1831B3B12 is currently cancelled.
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