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Technical Data Sheet
PartsTable / COMPONENT / 519577
519577 ✓ 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 BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8740 OVERALL, hole_type: DRILLED, head_style: HEXAGON, head_height: 0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN, thread_class: 3A A, hole_diameter: 0.062 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-913-8631, 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
519577
NSN: 5306-00-913-8631
FSC: 5306
CAGE: 11449 — TURBO POWER & MARINE SYSTEM INC SUB OF UNITED TECHNOLOGIES CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OVERALL
hole_typeDRILLED
head_styleHEXAGON
head_height0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
thread_class3A A
hole_diameter0.062 INCHES NOMINAL IN
hole_quantity2
thread_length0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
fastener_length0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
NSN5306-00-913-8631
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 519577 · 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
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
WIDTH BETWEEN FLATS: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
•
THREAD QUANTITY PER INCH: C8
•
HOLE QUANTITY: 2
•
FEATURES PROVIDED: FINISHED HEAD
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF)
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD DIAMETER0.250 INCHES IN
WIDTH BETWEEN FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
HEAD HEIGHT0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
THREAD QUANTITY PER INCHC8
HOLE QUANTITY2
FEATURES PROVIDEDFINISHED HEAD
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF)
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
MATERIALSTEEL COMP 8740 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
168A2434AXP04NCInterchangeable
interchangeable cross-reference
interchangeable
21346Interchangeable
interchangeable cross-reference
interchangeable
5117163Interchangeable
interchangeable cross-reference
interchangeable
168Interchangeable
interchangeable cross-reference
interchangeable
644881-1Interchangeable
interchangeable cross-reference
interchangeable
547470-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 519577?
519577 is a BOLT,MACHINE.
What parts can replace 519577?
There are 15 known substitutes for 519577: 168A2434AXP04NC, 21346, 5117163 and 12 more. Substitute compatibility should be verified for your specific system.
Is 519577 still available?
519577 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026