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PartsTable / COMPONENT / AN520-4-6
AN520-4-6 ✓ 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: ROUND, head_height: 0.086 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.193 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN, thread_length: 0.333 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, screw_material: STEEL OR STEEL COMP 1010. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-151-0259, 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
AN520-4-6
NSN: 5305-00-151-0259
FSC: 5305
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
head_styleROUND
head_height0.086 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.193 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
thread_length0.333 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
screw_materialSTEEL OR STEEL COMP 1010
fastener_length0.375 INCHES NOMINAL IN
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.112 INCHES IN
screw_surface_treatmentCADMIUM
minimum_tensile_strength55000 POUNDS PER SQUARE INCH LBS
thread_quantity_per_inch48
NSN5305-00-151-0259
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AN520-4-6 · 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: 0.193 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
•
THREAD SERIES DESIGNATOR: UNF
•
MINIMUM TENSILE STRENGTH: 55000 POUNDS PER SQUARE INCH LBS
•
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE
•
HEAD STYLE: ROUND
•
FASTENER LENGTH: 0.375 INCHES NOMINAL IN
•
SCREW SURFACE TREATMENT: CADMIUM
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
TECHNICAL CHARACTERISTICS (FLIS)
HEAD DIAMETER0.193 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORUNF
MINIMUM TENSILE STRENGTH55000 POUNDS PER SQUARE INCH LBS
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE
HEAD STYLEROUND
FASTENER LENGTH0.375 INCHES NOMINAL IN
SCREW SURFACE TREATMENTCADMIUM
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
HEAD HEIGHT0.086 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.112 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
FFS92ANDTYPE1ANDSTYLE1Interchangeable
interchangeable cross-reference
interchangeable
AN520C6-22Interchangeable
interchangeable cross-reference
interchangeable
29360-3Interchangeable
interchangeable cross-reference
interchangeable
AN520-4-4Interchangeable
interchangeable cross-reference
interchangeable
AN520-4-12Interchangeable
interchangeable cross-reference
interchangeable
AN520B3R4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN520-4-6?
AN520-4-6 is a SCREW,MACHINE.
What parts can replace AN520-4-6?
There are 17 known substitutes for AN520-4-6: FFS92ANDTYPE1ANDSTYLE1, AN520C6-22, 29360-3 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AN520-4-6?
AN520-4-6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-151-0259. 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