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2556918 — STUD,SELF-LOCKING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

2556918: STUD,SELF-LOCKING.

The STUD,SELF-LOCKING is a the manufacturer industrial component. Key specifications include material: STEEL, thread_class: 2A STUD THREAD A, overall_length: 0.675 INCHES NOMINAL IN, special_features: HEX HEAD, nominal_thread_size: 0.112 INCHES LOCATION NOT OTHERWISE SPECIFIED IN, end_item_identification: TORPEDO, MK46. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-381-4662, 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
2556918
NSN: 5307-01-381-4662
FSC: 5307 — Studs
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL
thread_class2A STUD THREAD A
overall_length0.675 INCHES NOMINAL IN
special_featuresHEX HEAD
nominal_thread_size0.112 INCHES LOCATION NOT OTHERWISE SPECIFIED IN
end_item_identificationTORPEDO, MK46
thread_quantity_per_inch40 STUD THREAD
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) STUD THREAD
NSN5307-01-381-4662
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2556918 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
NOMINAL THREAD SIZE: 0.112 INCHES LOCATION NOT OTHERWISE SPECIFIED IN
•
THREAD CLASS: 2A STUD THREAD A
•
THREAD QUANTITY PER INCH: 40 STUD THREAD
•
MATERIAL: STEEL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) STUD THREAD
TECHNICAL CHARACTERISTICS
OVERALL LENGTH0.675 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.112 INCHES LOCATION NOT OTHERWISE SPECIFIED IN
SPECIAL FEATURESHEX HEAD
THREAD CLASS2A STUD THREAD A
END ITEM IDENTIFICATIONTORPEDO, MK46
THREAD QUANTITY PER INCH40 STUD THREAD
MATERIALSTEEL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) STUD THREAD
OTHER ITEMS IN FSC 5307 — Studs
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5307-00-000-6436 5307-00-001-1578 5307-00-001-1761 5307-00-001-2366 5307-00-001-4491 5307-00-001-4624 5307-00-001-4625
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 2556918?
2556918 is a STUD,SELF-LOCKING.
What is the NSN for 2556918?
2556918 is cataloged in the U.S. Government catalog under NSN 5307-01-381-4662. 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.