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Technical Data Sheet
PartsTable / COMPONENT / AN4-25
AN4-25 ✓ 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,EYE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, shank_length: 0.641 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.391 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN, overall_length: 1.359 INCHES MINIMUM AND 1.406 INCHES MAXIMUM IN, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-151-1144, 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
AN4-25
NSN: 5306-00-151-1144
FSC: 5306
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
shank_length0.641 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN
thread_class3A A
thread_length0.391 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
overall_length1.359 INCHES MINIMUM AND 1.406 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
eye_outside_width0.438 INCHES NOMINAL IN
shoulder_diameter0.438 INCHES NOMINAL IN
surface_treatmentCADMIUM AND DICHROMATE OVERALL
shoulder_thickness0.062 INCHES NOMINAL IN
eye_inside_diameter0.188 INCHES MINIMUM AND 0.191 INCHES MAXIMUM IN
eye_stock_thickness0.089 INCHES MINIMUM AND 0.099 INCHES MAXIMUM IN
NSN5306-00-151-1144
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AN4-25 · 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 CLASS: 3A A
•
WIDTH BETWEEN FLATS: 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
•
THREAD SERIES DESIGNATOR: UNF
•
SHANK UNTHREADED HOLE DIAMETER: 0.076 INCHES MINIMUM FIRST HOLE IN
•
THREAD DIRECTION: RIGHT-HAND
•
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER: 2.500 INCHES NOMINAL FIRST HOLE IN
•
THREAD QUANTITY PER INCH: 28
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-6812 MIL SPEC ALL MATERIAL RESPONSES OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3A A
WIDTH BETWEEN FLATS0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORUNF
SHANK UNTHREADED HOLE DIAMETER0.076 INCHES MINIMUM FIRST HOLE IN
THREAD DIRECTIONRIGHT-HAND
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER2.500 INCHES NOMINAL FIRST HOLE IN
THREAD QUANTITY PER INCH28
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-6812 MIL SPEC ALL MATERIAL RESPONSES OVERALL
HEAD STYLEHEXAGON
GRIP LENGTH2.188 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
AN42-5Interchangeable
interchangeable cross-reference
interchangeable
V34530PC69Interchangeable
interchangeable cross-reference
interchangeable
P501768Interchangeable
interchangeable cross-reference
interchangeable
CAL9017PC1Interchangeable
interchangeable cross-reference
interchangeable
02045-0009Interchangeable
interchangeable cross-reference
interchangeable
A1003Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN4-25?
AN4-25 is a BOLT,EYE.
What parts can replace AN4-25?
There are 16 known substitutes for AN4-25: AN42-5, V34530PC69, P501768 and 13 more. Substitute compatibility should be verified for your specific system.
Is AN4-25 still available?
AN4-25 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