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PartsTable / COMPONENT / RA6401-58
RA6401-58 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 0.125 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.250 INCHES NOMINAL IN, thread_length: 0.450 INCHES MINIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-282-3410, 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
RA6401-58
NSN: 5305-00-282-3410
FSC: 5305
CAGE: 93712 — ALLIANT DEFENSE ELECTRONICS SYSTEMS INC DBA LUNDY TECHNICAL CENTER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.125 INCHES NOMINAL IN
thread_class3A A
head_diameter0.250 INCHES NOMINAL IN
thread_length0.450 INCHES MINIMUM IN
fastener_length0.500 INCHES NOMINAL IN
hardness_rating38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.094 INCHES NOMINAL IN
internal_drive_styleHEXAGON
NSN5305-00-282-3410
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: RA6401-58 · 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
•
MATERIAL: STEEL OVERALL
•
THREAD QUANTITY PER INCH: 40
•
HEAD HEIGHT: 0.125 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
MINIMUM TENSILE STRENGTH: 1350 POUNDS PER SQUARE INCH LBS
•
HEAD STYLE: FLAT CHAMFER
•
THREAD LENGTH: 0.450 INCHES MINIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
THREAD QUANTITY PER INCH40
HEAD HEIGHT0.125 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MINIMUM TENSILE STRENGTH1350 POUNDS PER SQUARE INCH LBS
HEAD STYLEFLAT CHAMFER
THREAD LENGTH0.450 INCHES MINIMUM IN
HEAD DIAMETER0.250 INCHES NOMINAL IN
INTERNAL DRIVE STYLEHEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
40262Interchangeable
interchangeable cross-reference
interchangeable
701-050Interchangeable
interchangeable cross-reference
interchangeable
B1486Interchangeable
interchangeable cross-reference
interchangeable
PC375Interchangeable
interchangeable cross-reference
interchangeable
CMP82100-619Interchangeable
interchangeable cross-reference
interchangeable
CMP82100-611Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RA6401-58?
RA6401-58 is a SCREW,CAP,SOCKET HEAD.
What parts can replace RA6401-58?
There are 9 known substitutes for RA6401-58: 40262, 701-050, B1486 and 6 more. Substitute compatibility should be verified for your specific system.
Is RA6401-58 still available?
RA6401-58 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026