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3M1250AC6-4 — STUD ASSEMBLY,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3M1250AC6-4: STUD ASSEMBLY,TURNLOCK FASTENER.

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.4473 INCHES MINIMUM AND 0.4475 INCHES MAXIMUM IN, material: STEEL CORROSION RESISTING OVERALL, eyelet_length: 0.633 INCHES MINIMUM AND 0.643 INCHES MAXIMUM IN, surface_treatment: PASSIVATE OVERALL, stud_assembly_style: STUD ASSEMBLY, eyelet_outside_diameter: 0.334 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-475-8642, 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
3M1250AC6-4
NSN: 5325-01-475-8642
FSC: 5325 — Fastening Devices
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
diameter0.4473 INCHES MINIMUM AND 0.4475 INCHES MAXIMUM IN
materialSTEEL CORROSION RESISTING OVERALL
eyelet_length0.633 INCHES MINIMUM AND 0.643 INCHES MAXIMUM IN
special_featuresSLEEVEBOLT IS CORROSION AND HEAT RESISTANT STEEL, PER A286 PER AMS 5731 OR AMS 5737; RETAINING RING IS CRES, 17-7PH PER MIL-S-25043, AMS 5528, CONDITION CH900 OR RH950
surface_treatmentPASSIVATE OVERALL
stud_assembly_styleSTUD ASSEMBLY
eyelet_outside_diameter0.334 INCHES NOMINAL IN
turnlock_stud_head_styleFLAT COUNTERSUNK
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
distance_from_engaging_member_to_largest_bearing_surface_of_head0.710 INCHES NOMINAL IN
NSN5325-01-475-8642
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3M1250AC6-4 · 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 TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EYELET OUTSIDE DIAMETER: 0.334 INCHES NOMINAL IN
•
DIAMETER: 0.4473 INCHES MINIMUM AND 0.4475 INCHES MAXIMUM IN
•
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD: 0.710 INCHES NOMINAL IN
•
TURNLOCK STUD HEAD STYLE: FLAT COUNTERSUNK
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EYELET OUTSIDE DIAMETER0.334 INCHES NOMINAL IN
DIAMETER0.4473 INCHES MINIMUM AND 0.4475 INCHES MAXIMUM IN
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD0.710 INCHES NOMINAL IN
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
SPECIAL FEATURESSLEEVEBOLT IS CORROSION AND HEAT RESISTANT STEEL, PER A286 PER AMS 5731 OR AMS 5737; RETAINING RING IS CRES, 17-7PH PER MIL-S-25043, AMS 5528, CONDITION CH900 OR RH950
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL CORROSION RESISTING OVERALL
STUD ASSEMBLY STYLESTUD ASSEMBLY
EYELET LENGTH0.633 INCHES MINIMUM AND 0.643 INCHES MAXIMUM IN
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 3
CA17202-4TXRSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
3M1250AC6-4ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MT172AC6-4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3M1250AC6-4?
3M1250AC6-4 is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace 3M1250AC6-4?
There are 3 known substitutes for 3M1250AC6-4: CA17202-4TXR, 3M1250AC6-4A, MT172AC6-4. Substitute compatibility should be verified for your specific system.
What is the NSN for 3M1250AC6-4?
3M1250AC6-4 is cataloged in the U.S. Government catalog under NSN 5325-01-475-8642. 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.