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Technical Data Sheet
NAS1831 ✓ 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: 1.87 INCHES MINIMUM AND 1.88 INCHES MAXIMUM IN, material: STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL, thread_class: 2B RIGHT INTERNAL, thread_length: 0.500 INCHES MINIMUM LEFT INTERNAL (INCLUDES THRU THREAD) IN, left_slot_depth: 0.375 INCHES NOMINAL IN, left_slot_width: 0.138 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-007-6108, 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
NAS1831
NSN: 5340-00-007-6108
FSC: 5340
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
length1.87 INCHES MINIMUM AND 1.88 INCHES MAXIMUM IN
materialSTEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL
thread_class2B RIGHT INTERNAL
thread_length0.500 INCHES MINIMUM LEFT INTERNAL (INCLUDES THRU THREAD) IN
left_slot_depth0.375 INCHES NOMINAL IN
left_slot_width0.138 INCHES NOMINAL IN
right_slot_depth0.375 INCHES NOMINAL IN
right_slot_width0.138 INCHES NOMINAL IN
special_featuresMATERIAL: STEEL OVERALL;SURFACE TREATMENT: CADMIUM OVERALL;BEARING SURFACE TYPE: FLAT
style_designatorLEFT INTERNAL AND RIGHT INTERNAL THREADS
thread_directionRIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD)
surface_treatmentCADMIUM OVERALL
NSN5340-00-007-6108
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: NAS1831 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
THREAD QUANTITY PER INCH: 40 RIGHT INTERNAL
CROSS-SECTIONAL SHAPE: HEXAGON
CROSS-SECTIONAL LENGTH: 0.375 INCHES NOMINAL IN
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) LEFT INTERNAL (INCLUDES THRU THREAD)
NOMINAL THREAD SIZE: 0.112 INCHES RIGHT INTERNAL IN
THREAD CLASS: 2B RIGHT INTERNAL
WIDTH ACROSS FLATS: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH40 RIGHT INTERNAL
CROSS-SECTIONAL SHAPEHEXAGON
SPECIAL FEATURESMATERIAL: STEEL COMP 303 OVERALL;MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL;SURFACE TREATMENT: PASSIVATE OVERALL;SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-14072,E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
CROSS-SECTIONAL LENGTH0.375 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) LEFT INTERNAL (INCLUDES THRU THREAD)
NOMINAL THREAD SIZE0.112 INCHES RIGHT INTERNAL IN
THREAD CLASS2B RIGHT INTERNAL
WIDTH ACROSS FLATS0.250 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND RIGHT INTERNAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
532353-628Upgraded Successor
successor cross-reference
successor
SS6951-0632-2.500-01Upgraded Successor
successor cross-reference
successor
0N664167Upgraded Successor
successor cross-reference
successor
8213-SS-0440Interchangeable
interchangeable cross-reference
interchangeable
P-521-M09-F09-440Interchangeable
Same NIIN cross-reference
interchangeable
317-6478-012Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS1831?
NAS1831 is a STANDOFF,THREADED,SPACING.
What parts can replace NAS1831?
There are 12 known substitutes for NAS1831: 532353-628, SS6951-0632-2.500-01, 0N664167 and 9 more. Substitute compatibility should be verified for your specific system.
Is NAS1831 still available?
NAS1831 is currently cancelled.
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