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PartsTable / COMPONENT / AN509-516R18
AN509-516R18 ✓ 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: 0.569 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN, thread_length: 0.464 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN, screw_material: STEEL COMP 8630 OR STEEL COMP 4037, fastener_length: 1.156 INCHES MINIMUM AND 1.203 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-269-4208, 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
AN509-516R18
NSN: 5305-00-269-4208
FSC: 5305
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
thread_class3A A
head_diameter0.569 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
thread_length0.464 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
screw_materialSTEEL COMP 8630 OR STEEL COMP 4037
fastener_length1.156 INCHES MINIMUM AND 1.203 INCHES MAXIMUM IN
hardness_rating22.0 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_diameter0.312 INCHES IN
screw_surface_treatmentCADMIUM AND CHROMATE
NSN5305-00-269-4208
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AN509-516R18 · 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 DIAMETER: 0.569 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
•
MINIMUM TENSILE STRENGTH: 125000 POUNDS PER SQUARE INCH LBS
•
COUNTERSINK ANGLE: 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
HARDNESS RATING: 22.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
HEAD STYLE: FLAT COUNTERSUNK
•
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
HEAD DIAMETER0.569 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
MINIMUM TENSILE STRENGTH125000 POUNDS PER SQUARE INCH LBS
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
NOMINAL THREAD DIAMETER0.312 INCHES IN
HARDNESS RATING22.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
HEAD STYLEFLAT COUNTERSUNK
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6050 MIL SPEC 1ST MATERIAL RESPONSE OR AMS 6300 ASSN STD 2ND MATERIAL RESPONSE
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
P73137-211Interchangeable
interchangeable cross-reference
interchangeable
87C1-4Interchangeable
interchangeable cross-reference
interchangeable
P69104-60Interchangeable
interchangeable cross-reference
interchangeable
12F-12MS-12TN90-96Interchangeable
interchangeable cross-reference
interchangeable
12F-12MS-12TN90Interchangeable
interchangeable cross-reference
interchangeable
103169Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN509-516R18?
AN509-516R18 is a SCREW,MACHINE.
What parts can replace AN509-516R18?
There are 12 known substitutes for AN509-516R18: P73137-211, 87C1-4, P69104-60 and 9 more. Substitute compatibility should be verified for your specific system.
Is AN509-516R18 still available?
AN509-516R18 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