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NK505C4-12 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

NK505C4-12: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, head_style: FLAT COUNTERSUNK, thread_class: 2A A, head_diameter: 0.225 INCHES NOMINAL IN, thread_length: 0.683 INCHES MINIMUM IN, fastener_length: 0.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-883-2718, 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
NK505C4-12
NSN: 5305-00-883-2718
FSC: 5305 — Screws
CAGE: 26233 — NYLOK LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
head_styleFLAT COUNTERSUNK
thread_class2A A
head_diameter0.225 INCHES NOMINAL IN
thread_length0.683 INCHES MINIMUM IN
fastener_length0.750 INCHES NOMINAL IN
locking_featurePELLET THREADS
thread_directionRIGHT-HAND
countersink_angle82.0 DEGREES NOMINAL
surface_treatmentPASSIVATE OVERALL
internal_drive_styleSLOT
nominal_thread_diameter0.112 INCHES IN
NSN5305-00-883-2718
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: NK505C4-12 · 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
•
FASTENER LENGTH: 0.750 INCHES NOMINAL IN
•
THREAD LENGTH: 0.683 INCHES MINIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.112 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
•
LOCKING FEATURE: PELLET THREADS
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
FASTENER LENGTH0.750 INCHES NOMINAL IN
THREAD LENGTH0.683 INCHES MINIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.112 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
LOCKING FEATUREPELLET THREADS
SURFACE TREATMENTPASSIVATE OVERALL
INTERNAL DRIVE STYLESLOT
COUNTERSINK ANGLE82.0 DEGREES NOMINAL
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES 1
M32CR440-12ESame 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 NK505C4-12?
NK505C4-12 is a SCREW,CAP,SOCKET HEAD.
What parts can replace NK505C4-12?
There is 1 known substitute for NK505C4-12: M32CR440-12E. Substitute compatibility should be verified for your specific system.
What is the NSN for NK505C4-12?
NK505C4-12 is cataloged in the U.S. Government catalog under NSN 5305-00-883-2718. 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.