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63B301558P2 — SCREW,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

63B301558P2: SCREW,EXTERNALLY RELIEVED BODY.

The SCREW,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_height: 0.060 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.180 INCHES MINIMUM IN, fastener_length: 0.544 INCHES MINIMUM AND 0.575 INCHES MAXIMUM IN, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-255-3059, 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
63B301558P2
NSN: 5305-01-255-3059
FSC: 5305 — Screws
CAGE: 16331 — LOCKHEED MARTIN CORPORATION DIV ROTARY AND MISSION SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_height0.060 INCHES NOMINAL IN
thread_class2A A
thread_length0.180 INCHES MINIMUM IN
fastener_length0.544 INCHES MINIMUM AND 0.575 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_between_flats0.203 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
nominal_thread_diameter0.112 INCHES IN
first_diameter_from_head0.122 INCHES MINIMUM AND 0.124 INCHES MAXIMUM IN
thread_quantity_per_inch40
second_diameter_from_head0.085 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
NSN5305-01-255-3059
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 63B301558P2 · 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
•
HEAD HEIGHT: 0.060 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.544 INCHES MINIMUM AND 0.575 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-P-416 TYPE 11,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.180 INCHES MINIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI B112 ASSN STD SINGLE MATERIAL RESPONSE OR AISI C1215 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
FIRST DIAMETER FROM HEAD: 0.122 INCHES MINIMUM AND 0.124 INCHES MAXIMUM IN
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER: 0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.112 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.060 INCHES NOMINAL IN
FASTENER LENGTH0.544 INCHES MINIMUM AND 0.575 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-P-416 TYPE 11,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.180 INCHES MINIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAISI B112 ASSN STD SINGLE MATERIAL RESPONSE OR AISI C1215 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FIRST DIAMETER FROM HEAD0.122 INCHES MINIMUM AND 0.124 INCHES MAXIMUM IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.112 INCHES IN
THREAD DIRECTIONRIGHT-HAND
SECOND DIAMETER FROM HEAD0.085 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 63B301558P2?
63B301558P2 is a SCREW,EXTERNALLY RELIEVED BODY.
What is the NSN for 63B301558P2?
63B301558P2 is cataloged in the U.S. Government catalog under NSN 5305-01-255-3059. 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.