PartsTable
Technical Data Sheet
Download PDF

40X-1236 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

40X-1236: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include thread_class: 6H, thread_series: MJ, thread_direction: RIGHT-HAND, end_item_identification: MRAP - UNIQUE NSN - MAXXPRO CAT I, part_name_assigned_by_controlling_agency: NUT-LOCK. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-556-4599, 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
40X-1236
NSN: 5310-01-556-4599
FSC: 5310 — Nuts and Washers
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)
SPECIFICATIONS
thread_class6H
thread_seriesMJ
thread_directionRIGHT-HAND
end_item_identificationMRAP - UNIQUE NSN - MAXXPRO CAT I
part_name_assigned_by_controlling_agencyNUT-LOCK
NSN5310-01-556-4599
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 40X-1236 · 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 SERIES: MJ
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD CLASS: 6H
TECHNICAL CHARACTERISTICS
THREAD SERIESMJ
THREAD DIRECTIONRIGHT-HAND
SPECIAL FEATURESTHESE ARE THE DIMENTIONS IN MM NOMINAL: WIDTH ACCROSS FLATS, 45.7; FROM POINT TO POINT ON THE HEXAGON, 52.2; HEIGHT, 18.3; OUTSIDE DIAMETER OF SHAFT, 39.8; INSIDE OF SHAFT, 33.0; THIS HAS A COUNTERSINK OF 90 DEGREES
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT-LOCK
THREAD CLASS6H
END ITEM IDENTIFICATIONMRAP - UNIQUE NSN - MAXXPRO CAT I
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 2
1689588C1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
40X-1236XReference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy 40X-1236?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 40X-1236?
40X-1236 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 40X-1236?
There are 2 known substitutes for 40X-1236: 1689588C1, 40X-1236X. Substitute compatibility should be verified for your specific system.
What is the NSN for 40X-1236?
40X-1236 is cataloged in the U.S. Government catalog under NSN 5310-01-556-4599. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 40X-1236

✓ 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.