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5856-40-677-7109 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

5856-40-677-7109: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 400 OVERALL, nut_style: HEXAGON, nut_height: 0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-400-3263, 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
5856-40-677-7109
NSN: 5310-01-400-3263
FSC: 5310 — Nuts and Washers
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400 OVERALL
nut_styleHEXAGON
nut_height0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
width_across_flats0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
nominal_thread_size0.500 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch13
nondefinitive_spec/std_dataPE 2 TYPE AND ADE 400 GRADE
NSN5310-01-400-3263
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5856-40-677-7109 · 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
•
WIDTH ACROSS FLATS: 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281, CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
NONDEFINITIVE SPEC/STD DATA: PE 2 TYPE AND ADE 400 GRADE
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
NUT HEIGHT: 0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281, CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.500 INCHES IN
NONDEFINITIVE SPEC/STD DATAPE 2 TYPE AND ADE 400 GRADE
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD CLASS2B
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 4
MIL-S-1222Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-DTL-1222Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-DTL-1222JReference document
Same NSN cross-reference
Reference document — Identification reference
MILS1222TY11GR4 00 .500-13UNC-2Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5856-40-677-7109?
5856-40-677-7109 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 5856-40-677-7109?
There are 4 known substitutes for 5856-40-677-7109: MIL-S-1222, MIL-DTL-1222, MIL-DTL-1222J and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5856-40-677-7109?
5856-40-677-7109 is cataloged in the U.S. Government catalog under NSN 5310-01-400-3263. 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.