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BACB30LU2-12 — SCREW,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

BACB30LU2-12: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8740 OR STEEL COMP E4340 OR STEEL COMP 4340 OVERALL, head_style: FLAT COUNTERSUNK, grip_length: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.1625 INCHES MINIMUM AND 0.1635 INCHES MAXIMUM IN, head_diameter: 0.295 INCHES MINIMUM AND 0.334 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-048-3253, 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
BACB30LU2-12
NSN: 5305-01-048-3253
FSC: 5305 — Screws
CAGE: 06725 — SPS TECHNOLOGIES, LLC DBA AIR INDUSTRIES COMPANY DIV AIR INDUSTRIES COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OR STEEL COMP E4340 OR STEEL COMP 4340 OVERALL
head_styleFLAT COUNTERSUNK
grip_length0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.1625 INCHES MINIMUM AND 0.1635 INCHES MAXIMUM IN
head_diameter0.295 INCHES MINIMUM AND 0.334 INCHES MAXIMUM IN
thread_length0.320 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
fastener_length1.080 INCHES MINIMUM AND 1.110 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
countersink_angle100.0 DEGREES NOMINAL
surface_treatmentCADMIUM AND CHROMATE OVERALL
internal_drive_styleCROSS RECESS TYPE 1
NSN5305-01-048-3253
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BACB30LU2-12 · 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
•
FASTENER LENGTH: 1.080 INCHES MINIMUM AND 1.110 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.320 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
•
GRIP LENGTH: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
•
GRIP DIAMETER: 0.1625 INCHES MINIMUM AND 0.1635 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
TECHNICAL CHARACTERISTICS
FASTENER LENGTH1.080 INCHES MINIMUM AND 1.110 INCHES MAXIMUM IN
THREAD LENGTH0.320 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.164 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
GRIP DIAMETER0.1625 INCHES MINIMUM AND 0.1635 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
COUNTERSINK ANGLE100.0 DEGREES NOMINAL
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
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 BACB30LU2-12?
BACB30LU2-12 is a SCREW,CLOSE TOLERANCE.
What is the NSN for BACB30LU2-12?
BACB30LU2-12 is cataloged in the U.S. Government catalog under NSN 5305-01-048-3253. 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.