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PartsTable / COMPONENT / AN174H40
AN174H40 ✓ 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,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include hole_type: DRILLED, head_style: HEXAGON, grip_length: 3.546 INCHES MINIMUM AND 3.578 INCHES MAXIMUM IN, head_height: 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-151-1062, 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
AN174H40
NSN: 5306-00-151-1062
FSC: 5306
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4037 OR STEEL COMP 4130 OR STEEL COMP 4140 OVERALL
hole_typeDRILLED
head_styleHEXAGON
grip_length3.546 INCHES MINIMUM AND 3.578 INCHES MAXIMUM IN
head_height0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN
hole_diameter0.046 INCHES NOMINAL IN
hole_quantity1
thread_length0.437 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES BEARING SURFACE OF HEAD
fastener_length4.015 INCHES MINIMUM AND 4.062 INCHES MAXIMUM IN
NSN5306-00-151-1062
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AN174H40 · 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 HEIGHT: 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
•
WIDTH BETWEEN FLATS: 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
•
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER: 3.858 INCHES MINIMUM AND 3.890 INCHES MAXIMUM FIRST HOLE IN
•
THREAD DIRECTION: RIGHT-HAND
•
GRIP DIAMETER: 0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN
•
GRIP LENGTH: 3.546 INCHES MINIMUM AND 3.578 INCHES MAXIMUM IN
•
HEAD STYLE: HEXAGON
•
SHANK UNTHREADED HOLE DIAMETER: 0.076 INCHES NOMINAL FIRST HOLE IN
TECHNICAL CHARACTERISTICS (FLIS)
HEAD HEIGHT0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER3.858 INCHES MINIMUM AND 3.890 INCHES MAXIMUM FIRST HOLE IN
THREAD DIRECTIONRIGHT-HAND
GRIP DIAMETER0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN
GRIP LENGTH3.546 INCHES MINIMUM AND 3.578 INCHES MAXIMUM IN
HEAD STYLEHEXAGON
SHANK UNTHREADED HOLE DIAMETER0.076 INCHES NOMINAL FIRST HOLE IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
FASTENER LENGTH4.015 INCHES MINIMUM AND 4.062 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
AN75A25Upgraded Successor
successor cross-reference
successor
B6812Upgraded Successor
successor cross-reference
successor
MS20074-05-25Upgraded Successor
successor cross-reference
successor
AN75A34Upgraded Successor
successor cross-reference
successor
MS20074-05-34Upgraded Successor
successor cross-reference
successor
AN75A40Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN174H40?
AN174H40 is a BOLT,CLOSE TOLERANCE.
What parts can replace AN174H40?
There are 18 known substitutes for AN174H40: AN75A25, B6812, MS20074-05-25 and 15 more. Substitute compatibility should be verified for your specific system.
Is AN174H40 still available?
AN174H40 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