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BACB30ST5-27 — BOLT,SHEAR

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

BACB30ST5-27: BOLT,SHEAR.

The BOLT,SHEAR is a the manufacturer industrial component. Key specifications include material: STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 FASTENER, head_style: DISHED HEXAGON, grip_length: 1.678 INCHES MINIMUM AND 1.698 INCHES MAXIMUM IN, head_height: 0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.3113 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-236-1637, 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
BACB30ST5-27
NSN: 5306-01-236-1637
FSC: 5306 — Bolts
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 FASTENER
head_styleDISHED HEXAGON
grip_length1.678 INCHES MINIMUM AND 1.698 INCHES MAXIMUM IN
head_height0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.3113 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN
thread_length0.439 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
fastener_length2.534 INCHES MINIMUM AND 2.564 INCHES MAXIMUM IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM FASTENER
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_between_flats0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
NSN5306-01-236-1637
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BACB30ST5-27 · 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
•
HEAD HEIGHT: 0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.534 INCHES MINIMUM AND 2.564 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.439 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM FASTENER
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
HEAD STYLE: DISHED HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
FASTENER LENGTH2.534 INCHES MINIMUM AND 2.564 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.439 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM FASTENER
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEDISHED HEXAGON
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH1.678 INCHES MINIMUM AND 1.698 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.492 INCHES MINIMUM AND 0.502 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 1
SPS75227-5Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 BACB30ST5-27?
BACB30ST5-27 is a BOLT,SHEAR.
What parts can replace BACB30ST5-27?
There is 1 known substitute for BACB30ST5-27: SPS75227-5. Substitute compatibility should be verified for your specific system.
What is the NSN for BACB30ST5-27?
BACB30ST5-27 is cataloged in the U.S. Government catalog under NSN 5306-01-236-1637. 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.