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Technical Data Sheet
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AN4H44 ✓ 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,MACHINE is a the manufacturer industrial component. Key specifications include hole_type: DRILLED, head_style: HEXAGON, grip_length: 4.046 INCHES MINIMUM AND 4.078 INCHES MAXIMUM IN, head_height: 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN, thread_class: 3A A, hole_diameter: 0.046 INCHES MINIMUM AND 0.056 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-282-2352, 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
AN4H44
NSN: 5306-01-282-2352
FSC: 5306
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4130 OR STEEL COMP 4037 OVERALL
hole_typeDRILLED
head_styleHEXAGON
grip_length4.046 INCHES MINIMUM AND 4.078 INCHES MAXIMUM IN
head_height0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
thread_class3A A
hole_diameter0.046 INCHES MINIMUM AND 0.056 INCHES MAXIMUM IN
hole_quantity1
thread_length0.437 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
fastener_length4.515 INCHES MINIMUM AND 4.562 INCHES MAXIMUM IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
NSN5306-01-282-2352
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AN4H44 · 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 LENGTH: 0.437 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
•
WIDTH BETWEEN FLATS: 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
HOLE TYPE: DRILLED
•
GRIP LENGTH: 4.046 INCHES MINIMUM AND 4.078 INCHES MAXIMUM IN
•
THREAD SERIES DESIGNATOR: UNF
•
THREAD CLASS: 3A A
•
FASTENER LENGTH: 4.515 INCHES MINIMUM AND 4.562 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH0.437 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HOLE TYPEDRILLED
GRIP LENGTH4.046 INCHES MINIMUM AND 4.078 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORUNF
THREAD CLASS3A A
FASTENER LENGTH4.515 INCHES MINIMUM AND 4.562 INCHES MAXIMUM IN
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER4.358 INCHES MINIMUM AND 4.390 INCHES MAXIMUM FIRST HOLE IN
HOLE QUANTITY1
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
AN4-44Upgraded Successor
successor cross-reference
successor
411177-44Interchangeable
interchangeable cross-reference
interchangeable
7901971-009Interchangeable
interchangeable cross-reference
interchangeable
5306PL0818284Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN4H44?
AN4H44 is a BOLT,MACHINE.
What parts can replace AN4H44?
There are 4 known substitutes for AN4H44: AN4-44, 411177-44, 7901971-009 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AN4H44?
AN4H44 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-282-2352. 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