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Technical Data Sheet
PartsTable / COMPONENT / 540-6-4
540-6-4 ✓ Verified by PartsTable
Silverlit · 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 TERMINAL,LUG is a Silverlit industrial component. Key specifications include material: STEEL OVERALL, head_style: SQUARE, head_height: 0.250 INCHES NOMINAL IN, current_type: DC, terminal_type: STUD, overall_length: 130.750 INCHES NOMINAL 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 5305-00-282-8991, 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
540-6-4
NSN: 5305-00-282-8991
FSC: 5305
CAGE: 80049 — DEPARTMENT OF THE AIR FORCE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleSQUARE
head_height0.250 INCHES NOMINAL IN
current_typeDC
terminal_typeSTUD
overall_length130.750 INCHES NOMINAL IN
voltage_rating10.0 VOLTS MINIMUM AND 12.0 VOLTS MAXIMUM
fastener_length2.000 INCHES NOMINAL IN
mounting_methodBRACKET(S)
actuation_methodFLOAT
special_features3,000 LBS. LBS
terminal_quantity3
NSN5305-00-282-8991
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 540-6-4 · Silverlit ⚠ 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: 2.000 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.250 INCHES NOMINAL IN
•
HEAD STYLE: SQUARE
•
MATERIAL: STEEL OVERALL
•
WIDTH BETWEEN FLATS: 0.562 INCHES NOMINAL IN
•
NONMACHINE THREAD STYLE: FETTER DRIVE (TYPE DR)
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH2.000 INCHES NOMINAL IN
HEAD HEIGHT0.250 INCHES NOMINAL IN
HEAD STYLESQUARE
MATERIALSTEEL OVERALL
WIDTH BETWEEN FLATS0.562 INCHES NOMINAL IN
NONMACHINE THREAD STYLEFETTER DRIVE (TYPE DR)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
54064Interchangeable
interchangeable cross-reference
interchangeable
XM-36460-120-0360-O-LInterchangeable
interchangeable cross-reference
interchangeable
SS20829BInterchangeable
interchangeable cross-reference
interchangeable
B-3353Interchangeable
interchangeable cross-reference
interchangeable
Y00016611Interchangeable
interchangeable cross-reference
interchangeable
FFB561ANDTYPE1ANDGRADECInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 540-6-4?
540-6-4 is a TERMINAL,LUG manufactured by Silverlit.
What parts can replace 540-6-4?
There are 6 known substitutes for 540-6-4: 54064, XM-36460-120-0360-O-L, SS20829B and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 540-6-4?
540-6-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-282-8991. 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