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BACB3OUS8P21 — BOLT,SHEAR

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

BACB3OUS8P21: BOLT,SHEAR.

The BOLT,SHEAR is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 718 OVERALL, head_style: SPLINE EXTENDED WASHER, grip_length: 1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM IN, head_height: 0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN, thread_class: AAL, grip_diameter: 0.4985 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-446-3143, 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
BACB3OUS8P21
NSN: 5306-01-446-3143
FSC: 5306 — Bolts
CAGE: 27624 — SPS TECHNOLOGIES LLC DBA PB FASTENERS DIV PB FASTENERS (USA)
SPECIFICATIONS
materialNICKEL ALLOY 718 OVERALL
head_styleSPLINE EXTENDED WASHER
grip_length1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM IN
head_height0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
thread_classAAL
grip_diameter0.4985 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN
thread_length0.910 INCHES NOMINAL IN
surface_finish32.0 MICROINCHES THREADS
fastener_length2.207 INCHES MINIMUM AND 2.237 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
features_providedDRY FILM LUBRICANT
surface_treatmentCADMIUM AND CHROMATE OVERALL
NSN5306-01-446-3143
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BACB3OUS8P21 · 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
•
EXTENDED WASHER THICKNESS: 0.113 INCHES MINIMUM AND 0.123 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.207 INCHES MINIMUM AND 2.237 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416, TY2, CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 0.808 INCHES MINIMUM AND 0.838 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES THREADS
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE FINISH32.0 MICROINCHES BEARING SURFACE OF HEAD
EXTENDED WASHER THICKNESS0.113 INCHES MINIMUM AND 0.123 INCHES MAXIMUM IN
HEAD HEIGHT0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
FASTENER LENGTH2.207 INCHES MINIMUM AND 2.237 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416, TY2, CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER0.808 INCHES MINIMUM AND 0.838 INCHES MAXIMUM IN
THREAD LENGTH0.910 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
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
BACB30US8P21Same 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 BACB3OUS8P21?
BACB3OUS8P21 is a BOLT,SHEAR.
What parts can replace BACB3OUS8P21?
There is 1 known substitute for BACB3OUS8P21: BACB30US8P21. Substitute compatibility should be verified for your specific system.
What is the NSN for BACB3OUS8P21?
BACB3OUS8P21 is cataloged in the U.S. Government catalog under NSN 5306-01-446-3143. 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.