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Technical Data Sheet
PartsTable / COMPONENT / 74399
74399 ✓ 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

COMMUNICATION-IDENTIFICATION-NAV. Key specifications include material: STEEL OVERALL, corner_shape: CHAMFERED OUTSIDE LEFT CORNER, overall_length: 0.5900 INCHES MINIMUM AND 0.5950 INCHES MAXIMUM IN, hardness_rating: 60.0 ROCKWELL C NOMINAL OVERALL, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, body_inside_diameter: 0.4390 INCHES MINIMUM AND 0.4420 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-206-9837, 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
74399
NSN: 5305-00-206-9837
FSC: 5305
CAGE: 64959 — AMERICAN TELEPHONE AND TELEGRAPH CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
corner_shapeCHAMFERED OUTSIDE LEFT CORNER
overall_length0.5900 INCHES MINIMUM AND 0.5950 INCHES MAXIMUM IN
hardness_rating60.0 ROCKWELL C NOMINAL OVERALL
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
body_inside_diameter0.4390 INCHES MINIMUM AND 0.4420 INCHES MAXIMUM IN
body_outside_diameter1.0520 INCHES MINIMUM AND 1.0720 INCHES MAXIMUM IN
lubricant_accommodation_styleGROOVED CIRCULAR
surface_groove_location_and_quantity1 INTERNAL
NSN5305-00-206-9837
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 74399 · 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 BETWEEN FLATS: 0.250 INCHES NOMINAL IN
•
FIRST DIAMETER FROM HEAD: 0.125 INCHES NOMINAL IN
•
THREAD CLASS: 3A A
•
MATERIAL: STEEL OVERALL
•
FASTENER LENGTH: 0.766 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER: 0.188 INCHES NOMINAL IN
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER: 0.578 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH BETWEEN FLATS0.250 INCHES NOMINAL IN
FIRST DIAMETER FROM HEAD0.125 INCHES NOMINAL IN
THREAD CLASS3A A
MATERIALSTEEL OVERALL
FASTENER LENGTH0.766 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.138 INCHES IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.188 INCHES NOMINAL IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER0.578 INCHES NOMINAL IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
2411 1-35/64Interchangeable
interchangeable cross-reference
interchangeable
74399Interchangeable
interchangeable cross-reference
interchangeable
29285Interchangeable
interchangeable cross-reference
interchangeable
367376-1Interchangeable
interchangeable cross-reference
interchangeable
1-1375-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 74399?
74399 is a COMMUNICATION-IDENTIFICATION-NAV.
What parts can replace 74399?
There are 5 known substitutes for 74399: 2411 1-35/64, 74399, 29285 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 74399?
74399 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-206-9837. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026