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BACB30LE5K21 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

BACB30LE5K21: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, head_style: DOUBLE HEXAGON EXTENDED WASHER, grip_length: 1.312 INCHES NOMINAL IN, head_height: 0.290 INCHES NOMINAL IN, thread_class: 3A A, grip_diameter: 0.312 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-574-8382, 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
BACB30LE5K21
NSN: 5306-01-574-8382
NIINs: 015748382, 016693934
FSC: 5306 — Bolts
CAGE: 06725 — SPS TECHNOLOGIES, LLC DBA AIR INDUSTRIES COMPANY DIV AIR INDUSTRIES COMPANY (USA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
head_styleDOUBLE HEXAGON EXTENDED WASHER
grip_length1.312 INCHES NOMINAL IN
head_height0.290 INCHES NOMINAL IN
thread_class3A A
grip_diameter0.312 INCHES MAXIMUM IN
thread_length0.593 INCHES NOMINAL IN
fastener_length1.405 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentALUMINUM OVERALL
width_between_flats0.418 INCHES MINIMUM AND 0.434 INCHES MAXIMUM IN
end_item_identificationKC-46 AIRCRAFT
NSN5306-01-574-8382
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BACB30LE5K21 · 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 THICKNESS: 0.050 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.290 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.405 INCHES NOMINAL IN
•
EXTENDED WASHER DIAMETER: 0.580 INCHES NOMINAL IN
•
THREAD LENGTH: 0.593 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON EXTENDED WASHER
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.050 INCHES NOMINAL IN
HEAD HEIGHT0.290 INCHES NOMINAL IN
FASTENER LENGTH1.405 INCHES NOMINAL IN
EXTENDED WASHER DIAMETER0.580 INCHES NOMINAL IN
THREAD LENGTH0.593 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEDOUBLE HEXAGON EXTENDED WASHER
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH1.312 INCHES NOMINAL IN
WIDTH BETWEEN FLATS0.418 INCHES MINIMUM AND 0.434 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is BACB30LE5K21?
BACB30LE5K21 is a BOLT,MACHINE.
What is the NSN for BACB30LE5K21?
BACB30LE5K21 is cataloged in the U.S. Government catalog under NSN 5306-01-574-8382. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.