PartsTable
Technical Data Sheet
Download PDF

63A141974P9 — SCREW,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

63A141974P9: SCREW,EXTERNALLY RELIEVED BODY.

The SCREW,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: KNURLED NO. 1, head_height: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM IN, thread_length: 0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN.

This part is cataloged in the U.S. Government catalog under NSN 5305-01-352-3296, 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
63A141974P9
NSN: 5305-01-352-3296
FSC: 5305 — Screws
CAGE: 16331 — LOCKHEED MARTIN CORPORATION DIV ROTARY AND MISSION SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleKNURLED NO. 1
head_height0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM IN
thread_length0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
fastener_length2.610 INCHES MINIMUM AND 2.640 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
internal_drive_styleSLOT
nominal_thread_diameter0.250 INCHES IN
first_diameter_from_head0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
NSN5305-01-352-3296
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 63A141974P9 · 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: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.610 INCHES MINIMUM AND 2.640 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTMA380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTMA555 ASSN STD SINGLE MATERIAL RESPONSE OR ASTMA581 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
FIRST DIAMETER FROM HEAD: 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: KNURLED NO. 1
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
FASTENER LENGTH2.610 INCHES MINIMUM AND 2.640 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTMA380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTMA555 ASSN STD SINGLE MATERIAL RESPONSE OR ASTMA581 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FIRST DIAMETER FROM HEAD0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEKNURLED NO. 1
THREAD DIRECTIONRIGHT-HAND
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER1.875 INCHES NOMINAL IN
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 2
66666-2508Reference document
Same NSN cross-reference
Reference document — Secondary reference
66666-25089Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy 63A141974P9?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 63A141974P9?
63A141974P9 is a SCREW,EXTERNALLY RELIEVED BODY.
What parts can replace 63A141974P9?
There are 2 known substitutes for 63A141974P9: 66666-2508, 66666-25089. Substitute compatibility should be verified for your specific system.
What is the NSN for 63A141974P9?
63A141974P9 is cataloged in the U.S. Government catalog under NSN 5305-01-352-3296. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 63A141974P9

✓ 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.