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EF266C05-012 — STUD,LOCKED IN

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

EF266C05-012: STUD,LOCKED IN.

The STUD,LOCKED IN is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303, locking_feature: RING, LOCK SERRATED, style_designator: LOCKED IN, surface_treatment: PASSIVATE OVERALL, distance_from_serrated_portion_to_nut_end: 11.0 MILLIMETERS NOMINAL MM, distance_from_serrated_portion_to_stud_end: 12.0 MILLIMETERS NOMINAL MM. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-362-7944, 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
EF266C05-012
NSN: 5307-01-362-7944
FSC: 5307 — Studs
CAGE: U7941 — LEONARDO UK LIMITED (AW/EH101) (GBR)
SPECIFICATIONS
materialSTEEL COMP 303
locking_featureRING, LOCK SERRATED
style_designatorLOCKED IN
surface_treatmentPASSIVATE OVERALL
distance_from_serrated_portion_to_nut_end11.0 MILLIMETERS NOMINAL MM
distance_from_serrated_portion_to_stud_end12.0 MILLIMETERS NOMINAL MM
NSN5307-01-362-7944
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: EF266C05-012 · 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
•
DISTANCE FROM SERRATED PORTION TO NUT END: 11.0 MILLIMETERS NOMINAL MM
•
STYLE DESIGNATOR: LOCKED IN
•
DISTANCE FROM SERRATED PORTION TO STUD END: 12.0 MILLIMETERS NOMINAL MM
•
LOCKING FEATURE: RING, LOCK SERRATED
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: STEEL COMP 303
TECHNICAL CHARACTERISTICS
DISTANCE FROM SERRATED PORTION TO NUT END11.0 MILLIMETERS NOMINAL MM
STYLE DESIGNATORLOCKED IN
DISTANCE FROM SERRATED PORTION TO STUD END12.0 MILLIMETERS NOMINAL MM
LOCKING FEATURERING, LOCK SERRATED
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL COMP 303
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 EF266C05-012?
EF266C05-012 is a STUD,LOCKED IN.
What is the NSN for EF266C05-012?
EF266C05-012 is cataloged in the U.S. Government catalog under NSN 5307-01-362-7944. 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.