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PartsTable / COMPONENT / LL57U40J6
LL57U40J6 ✓ 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 SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: FLAT CHAMFER, head_height: 0.109 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.178 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN, thread_length: 0.370 INCHES MINIMUM 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 5305-00-060-2540, 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
LL57U40J6
NSN: 5305-00-060-2540
FSC: 5305
CAGE: 03038 — LONG-LOK, LLC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleFLAT CHAMFER
head_height0.109 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.178 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN
thread_length0.370 INCHES MINIMUM IN
fastener_length0.370 INCHES NOMINAL IN
locking_featureSTRIP THREADS
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.078 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
internal_drive_styleHEXAGON
NSN5305-00-060-2540
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: LL57U40J6 · 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
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
HEAD DIAMETER: 0.178 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.370 INCHES NOMINAL IN
•
THREAD CLASS: 3A A
•
THREAD DIRECTION: RIGHT-HAND
•
HEAD STYLE: FLAT CHAMFER
•
HEAD HEIGHT: 0.109 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.370 INCHES MINIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL CORROSION RESISTING OVERALL
HEAD DIAMETER0.178 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN
FASTENER LENGTH0.370 INCHES NOMINAL IN
THREAD CLASS3A A
THREAD DIRECTIONRIGHT-HAND
HEAD STYLEFLAT CHAMFER
HEAD HEIGHT0.109 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN
THREAD LENGTH0.370 INCHES MINIMUM IN
PART NAME ASSIGNED BY CONTROLLING AGENCYSCREW,CAP,SOCKET HEAD
LOCKING FEATURESTRIP THREADS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
2585164Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-18240Interchangeable
interchangeable cross-reference
interchangeable
FFS92Interchangeable
interchangeable cross-reference
interchangeable
AN426AD6-28Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-18240Interchangeable
interchangeable cross-reference
interchangeable
MS21090-0619Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is LL57U40J6?
LL57U40J6 is a SCREW,CAP,SOCKET HEAD.
What parts can replace LL57U40J6?
There are 20 known substitutes for LL57U40J6: 2585164, MIL-DTL-18240, FFS92 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for LL57U40J6?
LL57U40J6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-060-2540. 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