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AN509-8R5 — Technical Data Sheet

✓ 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,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.283 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN, thread_length: 0.235 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, screw_material: STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740, fastener_length: 0.328 INCHES MINIMUM AND 0.375 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 5305-00-180-1433, 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
AN509-8R5
NSN: 5305-00-180-1433
FSC: 5305
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
thread_class3A A
head_diameter0.283 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
thread_length0.235 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
screw_materialSTEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740
fastener_length0.328 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
countersink_angle99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.164 INCHES IN
screw_surface_treatmentCADMIUM
NSN5305-00-180-1433
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AN509-8R5 · 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
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
THREAD CLASS: 3A A
•
SCREW MATERIAL: STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740
•
THREAD LENGTH: 0.235 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
COUNTERSINK ANGLE: 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
•
THREAD QUANTITY PER INCH: 32
•
FASTENER LENGTH: 0.328 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD CLASS3A A
SCREW MATERIALSTEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740
THREAD LENGTH0.235 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
THREAD QUANTITY PER INCH32
FASTENER LENGTH0.328 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
HEAD DIAMETER0.283 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTCADMIUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
32-01046-1Same_fsc
same_fsc cross-reference
same_fsc
NAS1741-3R20Same_fsc
same_fsc cross-reference
same_fsc
0010476Same_fsc
same_fsc cross-reference
same_fsc
MILS7839Interchangeable
Same NIIN cross-reference
interchangeable
NASM7839Interchangeable
Screw,machine
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN509-8R5?
AN509-8R5 is a SCREW,MACHINE.
What parts can replace AN509-8R5?
There are 5 known substitutes for AN509-8R5: 32-01046-1, NAS1741-3R20, 0010476 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AN509-8R5?
AN509-8R5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-180-1433. 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: September 2026