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BACB30ST7-31 — BOLT,SHEAR

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

BACB30ST7-31: 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: 1.923 INCHES MINIMUM AND 1.953 INCHES MAXIMUM IN, head_height: 0.219 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.4363 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-266-9207, 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
BACB30ST7-31
NSN: 5306-01-266-9207
FSC: 5306 — Bolts
CAGE: 80539 — SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP DIV AEROSPACE - SANTA ANA (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_length1.923 INCHES MINIMUM AND 1.953 INCHES MAXIMUM IN
head_height0.219 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.4363 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN
thread_length0.466 INCHES MINIMUM AND 0.476 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES THREADS
fastener_length2.801 INCHES MINIMUM AND 2.831 INCHES MAXIMUM IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM FASTENER
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE FASTENER
NSN5306-01-266-9207
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BACB30ST7-31 · 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 THREADS
•
HEAD HEIGHT: 0.219 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.801 INCHES MINIMUM AND 2.831 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.466 INCHES MINIMUM AND 0.476 INCHES MAXIMUM IN
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM FASTENER
•
SHANK UNTHREADED HOLE DIAMETER: 0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES THREADS
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE FINISH63.0 MICROINCHES BEARING SURFACE OF HEAD
HEAD HEIGHT0.219 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
FASTENER LENGTH2.801 INCHES MINIMUM AND 2.831 INCHES MAXIMUM IN
THREAD LENGTH0.466 INCHES MINIMUM AND 0.476 INCHES MAXIMUM IN
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM FASTENER
SHANK UNTHREADED HOLE DIAMETER0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE IN
NOMINAL THREAD DIAMETER0.438 INCHES IN
HEAD STYLEDISHED HEXAGON
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 BACB30ST7-31?
BACB30ST7-31 is a BOLT,SHEAR.
What is the NSN for BACB30ST7-31?
BACB30ST7-31 is cataloged in the U.S. Government catalog under NSN 5306-01-266-9207. 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.