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1199K2351 — NUT,PLAIN,SINGLE BALL SEAT,HEXAG

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1199K2351: NUT,PLAIN,SINGLE BALL SEAT,HEXAG.

NUT,PLAIN,SINGLE BALL SEAT,HEXAG. Key specifications include material: STEEL OVERALL, nut_style: SINGLE BALL SEAT, HEXAGON, nut_height: 1.380 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNEF, ball_seat_radius: 1.193 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-772-8256, 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
1199K2351
NSN: 5310-00-772-8256
FSC: 5310 — Nuts and Washers
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSINGLE BALL SEAT, HEXAGON
nut_height1.380 INCHES NOMINAL IN
thread_class3B
thread_seriesUNEF
ball_seat_radius1.193 INCHES NOMINAL IN
thread_directionLEFT-HAND
surface_treatmentZINC OVERALL
width_across_flats1.750 INCHES NOMINAL IN
nominal_thread_size0.938 INCHES IN
thread_quantity_per_inch20
NSN5310-00-772-8256
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1199K2351 · 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: 1.750 INCHES NOMINAL IN
•
THREAD SERIES: UNEF
•
THREAD DIRECTION: LEFT-HAND
•
NOMINAL THREAD SIZE: 0.938 INCHES IN
•
NUT HEIGHT: 1.380 INCHES NOMINAL IN
•
BALL SEAT RADIUS: 1.193 INCHES NOMINAL IN
•
SURFACE TREATMENT: ZINC OVERALL
•
NUT STYLE: SINGLE BALL SEAT, HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.750 INCHES NOMINAL IN
THREAD SERIESUNEF
THREAD DIRECTIONLEFT-HAND
NOMINAL THREAD SIZE0.938 INCHES IN
NUT HEIGHT1.380 INCHES NOMINAL IN
BALL SEAT RADIUS1.193 INCHES NOMINAL IN
SURFACE TREATMENTZINC OVERALL
NUT STYLESINGLE BALL SEAT, HEXAGON
THREAD CLASS3B
THREAD QUANTITY PER INCH20
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1199K2351?
1199K2351 is a NUT,PLAIN,SINGLE BALL SEAT,HEXAG.
What is the NSN for 1199K2351?
1199K2351 is cataloged in the U.S. Government catalog under NSN 5310-00-772-8256. 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.