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3M1055C6A8 — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3M1055C6A8: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include diameter: 0.480 INCHES NOMINAL IN, material: IRON ALLOY 660 OVERALL, drive_type: SOCKET, grip_length: 0.952 INCHES NOMINAL IN, extension_length: 0.078 INCHES MAXIMUM IN, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-312-7679, 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
3M1055C6A8
NSN: 5325-01-312-7679
FSC: 5325 — Fastening Devices
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
diameter0.480 INCHES NOMINAL IN
materialIRON ALLOY 660 OVERALL
drive_typeSOCKET
grip_length0.952 INCHES NOMINAL IN
extension_length0.078 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
securing_device_typeSPRING
turnlock_stud_head_styleFLAT COUNTERSUNK
stud_shank_major_diameter0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.376 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
stud_thread_size_and_series/type_designator0.250-28 UNIFIED NATIONAL JOINT FINE (UNJF)
NSN5325-01-312-7679
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3M1055C6A8 · 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
•
DRIVE TYPE: SOCKET
•
MATERIAL ACCOMMODATED THICKNESS: 0.376 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
EXTENSION LENGTH: 0.078 INCHES MAXIMUM IN
•
DIAMETER: 0.480 INCHES NOMINAL IN
•
SECURING DEVICE TYPE: SPRING
•
TURNLOCK STUD HEAD STYLE: FLAT COUNTERSUNK
•
STUD SHANK MAJOR DIAMETER: 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
DRIVE TYPESOCKET
MATERIAL ACCOMMODATED THICKNESS0.376 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
TURNLOCK STUD SHANK STYLESTUD SHANK
EXTENSION LENGTH0.078 INCHES MAXIMUM IN
DIAMETER0.480 INCHES NOMINAL IN
SECURING DEVICE TYPESPRING
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
STUD SHANK MAJOR DIAMETER0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALIRON ALLOY 660 OVERALL
OTHER ITEMS IN FSC 5325 — Fastening Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317
SUBSTITUTES & CROSS-REFERENCES 1
3223S6-8Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 3M1055C6A8?
3M1055C6A8 is a STUD,TURNLOCK FASTENER.
What parts can replace 3M1055C6A8?
There is 1 known substitute for 3M1055C6A8: 3223S6-8. Substitute compatibility should be verified for your specific system.
What is the NSN for 3M1055C6A8?
3M1055C6A8 is cataloged in the U.S. Government catalog under NSN 5325-01-312-7679. 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.