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MS51989E105-12 — STUD,LOCKED IN

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MS51989E105-12: STUD,LOCKED IN.

The STUD,LOCKED IN is a the manufacturer industrial component. Key specifications include material: STEEL, thread_class: 3A NUT THREAD A, thread_length: 0.375 INCHES MINIMUM AND 0.405 INCHES MAXIMUM STUD THREAD IN, overall_length: 1.280 INCHES MINIMUM AND 1.340 INCHES MAXIMUM IN, surface_finish: 32.0 MICROINCHES NUT THD, locking_feature: RING, LOCK SERRATED. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-231-1893, 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
MS51989E105-12
NSN: 5307-00-231-1893
FSC: 5307 — Studs
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialSTEEL
thread_class3A NUT THREAD A
thread_length0.375 INCHES MINIMUM AND 0.405 INCHES MAXIMUM STUD THREAD IN
overall_length1.280 INCHES MINIMUM AND 1.340 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES NUT THD
locking_featureRING, LOCK SERRATED
style_designatorLOCKED IN
thread_directionRIGHT-HAND NUT THREAD
surface_treatmentPASSIVATE OVERALL
serration_quantity17
nominal_thread_size0.312 INCHES STUD THREAD IN
thread_pitch_diameters+0.2778 TO 0.2795 INCHES STUD THREAD IN
NSN5307-00-231-1893
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS51989E105-12 · 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
•
SURFACE FINISH: 32.0 MICROINCHES NUT THD
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
DISTANCE FROM SERRATED PORTION TO NUT END: 0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM NUT THREAD IN
•
STYLE DESIGNATOR: LOCKED IN
•
THREAD PITCH DIAMETERS: +0.2778 TO 0.2795 INCHES STUD THREAD IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES NUT THD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
DISTANCE FROM SERRATED PORTION TO NUT END0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
THREAD LENGTH0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM NUT THREAD IN
THREAD LENGTH0.375 INCHES MINIMUM AND 0.405 INCHES MAXIMUM STUD THREAD IN
STYLE DESIGNATORLOCKED IN
THREAD PITCH DIAMETERS+0.2778 TO 0.2795 INCHES STUD THREAD IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5734 ASSN STD SINGLE MATERIAL RESPONSE
OVERALL LENGTH1.280 INCHES MINIMUM AND 1.340 INCHES MAXIMUM IN
DISTANCE FROM SERRATED PORTION TO END OF STUD THREAD0.140 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
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 1
MS51989C105&12Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 MS51989E105-12?
MS51989E105-12 is a STUD,LOCKED IN.
What parts can replace MS51989E105-12?
There is 1 known substitute for MS51989E105-12: MS51989C105&12. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51989E105-12?
MS51989E105-12 is cataloged in the U.S. Government catalog under NSN 5307-00-231-1893. 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.