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M63CR420-165 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

M63CR420-165: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 305 FASTENER, head_style: BUTTON, head_height: 0.419 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.122 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN, thread_length: 0.868 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-274-1256, 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
M63CR420-165
NSN: 5305-01-274-1256
FSC: 5305 — Screws
CAGE: 17910 — NYLOK LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 305 FASTENER
head_styleBUTTON
head_height0.419 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.122 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN
thread_length0.868 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
fastener_length0.968 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
hardness_rating80.0 ROCKWELL B MINIMUM FASTENER
locking_featurePELLET THREADS
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE FASTENER
width_across_flats0.1562 INCHES MINIMUM AND 0.1582 INCHES MAXIMUM IN
NSN5305-01-274-1256
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: M63CR420-165 · 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
•
WIDTH ACROSS FLATS: 0.1562 INCHES MINIMUM AND 0.1582 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.419 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.968 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
•
THREAD LENGTH: 0.868 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
•
HARDNESS RATING: 80.0 ROCKWELL B MINIMUM FASTENER
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A493 ASSN STD ALL MATERIAL RESPONSES FASTENER
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.1562 INCHES MINIMUM AND 0.1582 INCHES MAXIMUM IN
HEAD HEIGHT0.419 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
FASTENER LENGTH0.968 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
THREAD LENGTH0.868 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
HARDNESS RATING80.0 ROCKWELL B MINIMUM FASTENER
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A493 ASSN STD ALL MATERIAL RESPONSES FASTENER
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEBUTTON
THREAD DIRECTIONRIGHT-HAND
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES 3
13234155Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
TN33CR040J12PSReference document
Same NSN cross-reference
Reference document — Secondary reference
38031K-4C-16Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is M63CR420-165?
M63CR420-165 is a SCREW,CAP,SOCKET HEAD.
What parts can replace M63CR420-165?
There are 3 known substitutes for M63CR420-165: 13234155, TN33CR040J12PS, 38031K-4C-16. Substitute compatibility should be verified for your specific system.
What is the NSN for M63CR420-165?
M63CR420-165 is cataloged in the U.S. Government catalog under NSN 5305-01-274-1256. 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.