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N4-8-5 — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

N4-8-5: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include diameter: 0.525 INCHES MINIMUM AND 0.545 INCHES MAXIMUM IN, material: ALUMINUM ALLOY 2024 OVERALL, grip_length: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, stud_head_height: 0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN, surface_treatment: ANODIZE OVERALL, turnlock_stud_head_style: FLAT FILLISTER. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-916-9359, 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
N4-8-5
NSN: 5325-00-916-9359
FSC: 5325 — Fastening Devices
CAGE: L4528 — LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC (CAN)
SPECIFICATIONS
diameter0.525 INCHES MINIMUM AND 0.545 INCHES MAXIMUM IN
materialALUMINUM ALLOY 2024 OVERALL
grip_length0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
stud_head_height0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN
surface_treatmentANODIZE OVERALL
turnlock_stud_head_styleFLAT FILLISTER
stud_shank_major_diameter0.417 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.406 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
material_document_and_classificationQQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6,T851 OR T8511 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-A-8625,TY 1 OR 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5325-00-916-9359
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: N4-8-5 · 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: MIL-A-8625,TY 1 OR 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL ACCOMMODATED THICKNESS: 0.406 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6,T851 OR T8511 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
DIAMETER: 0.525 INCHES MINIMUM AND 0.545 INCHES MAXIMUM IN
•
STUD HEAD HEIGHT: 0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN
•
TURNLOCK STUD HEAD STYLE: FLAT FILLISTER
•
STUD SHANK MAJOR DIAMETER: 0.417 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY 1 OR 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL ACCOMMODATED THICKNESS0.406 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
TURNLOCK STUD SHANK STYLESTUD SHANK
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6,T851 OR T8511 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
DIAMETER0.525 INCHES MINIMUM AND 0.545 INCHES MAXIMUM IN
STUD HEAD HEIGHT0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN
TURNLOCK STUD HEAD STYLEFLAT FILLISTER
STUD SHANK MAJOR DIAMETER0.417 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE OVERALL
MATERIALALUMINUM ALLOY 2024 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 3
C694-8-5Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
2114-8-5Reference document
Same NSN cross-reference
Reference document — Secondary reference
2114-25-5Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is N4-8-5?
N4-8-5 is a STUD,TURNLOCK FASTENER.
What parts can replace N4-8-5?
There are 3 known substitutes for N4-8-5: C694-8-5, 2114-8-5, 2114-25-5. Substitute compatibility should be verified for your specific system.
What is the NSN for N4-8-5?
N4-8-5 is cataloged in the U.S. Government catalog under NSN 5325-00-916-9359. 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.