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BACB30US6K31 — BOLT,SHEAR

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

BACB30US6K31: BOLT,SHEAR.

The BOLT,SHEAR is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 718 OVERALL, head_style: DOUBLE HEXAGON W/HOLE, grip_length: 1.9275 INCHES MINIMUM AND 1.9475 INCHES MAXIMUM IN, head_height: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.4360 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-436-1348, 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
BACB30US6K31
NSN: 5306-01-436-1348
NIINs: 014361348, 017301980
FSC: 5306 — Bolts
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialNICKEL ALLOY 718 OVERALL
head_styleDOUBLE HEXAGON W/HOLE
grip_length1.9275 INCHES MINIMUM AND 1.9475 INCHES MAXIMUM IN
head_height0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.4360 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN
thread_length0.733 INCHES NOMINAL IN
fastener_length2.6555 INCHES MINIMUM AND 2.6855 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentALUMINUM OVERALL
width_between_flats0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
nominal_thread_diameter0.4375 INCHES IN
NSN5306-01-436-1348
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BACB30US6K31 · 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: 0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.6555 INCHES MINIMUM AND 2.6855 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: BMS10-85, TYPE 1, CAGEC 81205 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.733 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.4375 INCHES IN
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
HEAD HEIGHT0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
FASTENER LENGTH2.6555 INCHES MINIMUM AND 2.6855 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONBMS10-85, TYPE 1, CAGEC 81205 MFR REF SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
THREAD LENGTH0.733 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.4375 INCHES IN
HEAD STYLEDOUBLE HEXAGON W/HOLE
THREAD DIRECTIONRIGHT-HAND
SUBSTITUTES & CROSS-REFERENCES 1
BACB30US7K31Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 BACB30US6K31?
BACB30US6K31 is a BOLT,SHEAR.
What parts can replace BACB30US6K31?
There is 1 known substitute for BACB30US6K31: BACB30US7K31. Substitute compatibility should be verified for your specific system.
What is the NSN for BACB30US6K31?
BACB30US6K31 is cataloged in the U.S. Government catalog under NSN 5306-01-436-1348. 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.