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BACB30NF5H27 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

BACB30NF5H27: BOLT,CLOSE TOLERANCE.

The BOLT,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4340 OR STEEL COMP 8740 OVERALL, hole_type: DRILLED, head_style: UNDERCUT HEXAGON, grip_length: 1.677 INCHES MINIMUM AND 1.697 INCHES MAXIMUM IN, head_height: 0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN, thread_class: 3A A. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-031-1446, 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
BACB30NF5H27
NSN: 5306-01-031-1446
FSC: 5306 — Bolts
CAGE: 06950 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 4340 OR STEEL COMP 8740 OVERALL
hole_typeDRILLED
head_styleUNDERCUT HEXAGON
grip_length1.677 INCHES MINIMUM AND 1.697 INCHES MAXIMUM IN
head_height0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN
hole_diameter0.070 INCHES NOMINAL IN
hole_quantity3
thread_length0.429 INCHES MINIMUM AND 0.479 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES BEARING SURFACE OF HEAD
fastener_length2.126 INCHES MINIMUM AND 2.156 INCHES MAXIMUM IN
NSN5306-01-031-1446
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BACB30NF5H27 · 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
•
SURFACE FINISH: 32.0 MICROINCHES BEARING SURFACE OF HEAD
•
HEAD HEIGHT: 0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.126 INCHES MINIMUM AND 2.156 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: Q-P-416,TY 2,CL 3 FED SPEC 13TH TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.429 INCHES MINIMUM AND 0.479 INCHES MAXIMUM IN
•
HOLE CONFIGURATION STYLE: HEXAGON CORNERS
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
HEAD STYLE: UNDERCUT HEXAGON
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES BEARING SURFACE OF HEAD
HEAD HEIGHT0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
FASTENER LENGTH2.126 INCHES MINIMUM AND 2.156 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQ-P-416,TY 2,CL 3 FED SPEC 13TH TREATMENT RESPONSE OVERALL
THREAD LENGTH0.429 INCHES MINIMUM AND 0.479 INCHES MAXIMUM IN
HOLE CONFIGURATION STYLEHEXAGON CORNERS
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEUNDERCUT HEXAGON
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH1.677 INCHES MINIMUM AND 1.697 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is BACB30NF5H27?
BACB30NF5H27 is a BOLT,CLOSE TOLERANCE.
What is the NSN for BACB30NF5H27?
BACB30NF5H27 is cataloged in the U.S. Government catalog under NSN 5306-01-031-1446. 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.