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PartsTable / COMPONENT / 57A1372
57A1372 ✓ 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 material: STEEL COMP 4042 OR STEEL COMP 8637 OR STEEL COMP 8740 OVERALL, head_style: DOUBLE HEXAGON EXTENDED WASHER, grip_length: 1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN, head_height: 0.438 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 0.525 INCHES MINIMUM AND 1.125 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 5306-00-916-2405, 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
57A1372
NSN: 5306-00-916-2405
FSC: 5306
CAGE: 24692 — HARTZELL PROPELLER LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 4042 OR STEEL COMP 8637 OR STEEL COMP 8740 OVERALL
head_styleDOUBLE HEXAGON EXTENDED WASHER
grip_length1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
head_height0.438 INCHES NOMINAL IN
thread_class3A A
thread_length0.525 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
fastener_length2.125 INCHES NOMINAL IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentCADMIUM OVERALL
width_between_flats0.438 INCHES NOMINAL IN
NSN5306-00-916-2405
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 57A1372 · 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
•
EXTENDED WASHER DIAMETER: 0.625 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 20
•
FASTENER LENGTH: 2.125 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD CLASS: 3A A
•
THREAD SERIES DESIGNATOR: UNF
•
HEAD HEIGHT: 0.438 INCHES NOMINAL IN
•
GRIP LENGTH: 1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
EXTENDED WASHER DIAMETER0.625 INCHES NOMINAL IN
THREAD QUANTITY PER INCH20
FASTENER LENGTH2.125 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS3A A
THREAD SERIES DESIGNATORUNF
HEAD HEIGHT0.438 INCHES NOMINAL IN
GRIP LENGTH1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
FEATURES PROVIDEDFINISHED HEAD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
MS35922-43Interchangeable
interchangeable cross-reference
interchangeable
B16.22Interchangeable
interchangeable cross-reference
interchangeable
3664-85REVBPC38Interchangeable
interchangeable cross-reference
interchangeable
A1372Interchangeable
interchangeable cross-reference
interchangeable
LD-12Interchangeable
interchangeable cross-reference
interchangeable
968.29.11.310Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 57A1372?
57A1372 is a BOLT,MACHINE.
What parts can replace 57A1372?
There are 6 known substitutes for 57A1372: MS35922-43, B16.22, 3664-85REVBPC38 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 57A1372?
57A1372 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-916-2405. 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