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343986 — NUT,CONCAVE,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

343986: NUT,CONCAVE,HEXAGON.

The NUT,CONCAVE,HEXAGON is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, nut_style: SINGLE CONCAVE, HEXAGON, nut_height: 0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN, thread_class: 3B, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-810-2170, 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
343986
NSN: 5310-00-810-2170
FSC: 5310 — Nuts and Washers
CAGE: 00198 — PRATT & WHITNEY CANADA CORP DIV PRATT & WHITNEY CANADA CORP. (CAN)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
nut_styleSINGLE CONCAVE, HEXAGON
nut_height0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
thread_class3B
thread_directionRIGHT-HAND
NSN5310-00-810-2170
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 343986 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD DIRECTION: RIGHT-HAND
•
NUT HEIGHT: 0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
•
NUT STYLE: SINGLE CONCAVE, HEXAGON
•
THREAD CLASS: 3B
•
MATERIAL: ALUMINUM ALLOY OVERALL
TECHNICAL CHARACTERISTICS
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
NUT STYLESINGLE CONCAVE, HEXAGON
THREAD CLASS3B
MATERIALALUMINUM ALLOY OVERALL
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 343986?
343986 is a NUT,CONCAVE,HEXAGON.
What is the NSN for 343986?
343986 is cataloged in the U.S. Government catalog under NSN 5310-00-810-2170. 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.