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426376 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

426376: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.196 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), hardness_rating: 68.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-042-6376, 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
426376
NSN: 5310-00-042-6376
FSC: 5310 — Nuts and Washers
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.196 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
hardness_rating68.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
width_across_flats0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
nominal_thread_size0.250 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
end_item_identificationLOGISTICS SUPPORT VESSEL
thread_quantity_per_inch20
NSN5310-00-042-6376
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 426376 · 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: 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
HARDNESS RATING: 68.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 4 STYLE AND A GRADE
•
NUT HEIGHT: 0.196 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
HARDNESS RATING68.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 4 STYLE AND A GRADE
NUT HEIGHT0.196 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD CLASS2B
END ITEM IDENTIFICATIONLOGISTICS SUPPORT VESSEL
SUBSTITUTES & CROSS-REFERENCES 3
1B4330Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
FFN836Reference document
Same NSN cross-reference
Reference document — Identification reference
JM56Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 426376?
426376 is a NUT,PLAIN,HEXAGON.
What parts can replace 426376?
There are 3 known substitutes for 426376: 1B4330, FFN836, JM56. Substitute compatibility should be verified for your specific system.
What is the NSN for 426376?
426376 is cataloged in the U.S. Government catalog under NSN 5310-00-042-6376. This indicates validated use in U.S. government and defense supply chains.
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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.