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MS51989-105D16 — STUD,LOCKED IN

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MS51989-105D16: STUD,LOCKED IN.

The STUD,LOCKED IN is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130, thread_class: 3A NUT THREAD A, thread_length: 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM NUT THREAD IN, overall_length: 1.530 INCHES MINIMUM AND 1.590 INCHES MAXIMUM IN, surface_finish: 32.0 MICROINCHES NUT THD, hardness_rating: 26.0 ROCKWELL C MINIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-114-5255, 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
MS51989-105D16
NSN: 5307-01-114-5255
FSC: 5307 — Studs
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialSTEEL COMP 4130
thread_class3A NUT THREAD A
thread_length0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM NUT THREAD IN
overall_length1.530 INCHES MINIMUM AND 1.590 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES NUT THD
hardness_rating26.0 ROCKWELL C MINIMUM
locking_featureRING, LOCK SERRATED
style_designatorLOCKED IN
thread_directionRIGHT-HAND NUT THREAD
surface_treatmentCADMIUM AND CHROMATE OVERALL
serration_quantity17
nominal_thread_size0.250 INCHES NUT THREAD IN
NSN5307-01-114-5255
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS51989-105D16 · 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-416 TY2 CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
COTTER PIN HOLE DIAMETER: 0.076 INCHES NOMINAL FIRST HOLE IN
•
DISTANCE FROM SERRATED PORTION TO NUT END: 0.985 INCHES MINIMUM AND 1.015 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM NUT THREAD IN
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM
•
STYLE DESIGNATOR: LOCKED IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES NUT THD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY2 CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
COTTER PIN HOLE DIAMETER0.076 INCHES NOMINAL FIRST HOLE IN
DISTANCE FROM SERRATED PORTION TO NUT END0.985 INCHES MINIMUM AND 1.015 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
HARDNESS RATING26.0 ROCKWELL C MINIMUM
STYLE DESIGNATORLOCKED IN
THREAD PITCH DIAMETERS+0.2778 TO 0.2795 INCHES STUD THREAD IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE
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
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS51989-105D16?
MS51989-105D16 is a STUD,LOCKED IN.
What is the NSN for MS51989-105D16?
MS51989-105D16 is cataloged in the U.S. Government catalog under NSN 5307-01-114-5255. 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.