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Technical Data Sheet
PartsTable / COMPONENT / AN173H24A
AN173H24A ✓ 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 head_height: 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.406 INCHES MINIMUM IN, fastener_length: 2.531 INCHES NOMINAL IN, minimum_tensile_strength: 125000 POUNDS PER SQUARE INCH LBS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-156-2457, 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
AN173H24A
NSN: 5306-00-156-2457
FSC: 5306
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
head_height0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
thread_class3A A
thread_length0.406 INCHES MINIMUM IN
fastener_length2.531 INCHES NOMINAL IN
minimum_tensile_strength125000 POUNDS PER SQUARE INCH LBS
NSN5306-00-156-2457
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AN173H24A · 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
•
FASTENER LENGTH: 2.531 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.406 INCHES MINIMUM IN
•
THREAD CLASS: 3A A
•
MINIMUM TENSILE STRENGTH: 125000 POUNDS PER SQUARE INCH LBS
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH2.531 INCHES NOMINAL IN
HEAD HEIGHT0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
THREAD LENGTH0.406 INCHES MINIMUM IN
THREAD CLASS3A A
MINIMUM TENSILE STRENGTH125000 POUNDS PER SQUARE INCH LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
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 AN173H24A?
AN173H24A is a BOLT,CLOSE TOLERANCE.
What parts can replace AN173H24A?
There are 19 known substitutes for AN173H24A: AN75A25, B6812, MS20074-05-25 and 16 more. Substitute compatibility should be verified for your specific system.
Is AN173H24A still available?
AN173H24A 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