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BS0A-6440-12 — NUT,PLAIN,CLINCH

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

BS0A-6440-12: NUT,PLAIN,CLINCH.

The NUT,PLAIN,CLINCH is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 7075 OVERALL, nut_style: CLINCHCLINCH, nut_height: 0.370 INCHES MINIMUM AND 0.370 INCHES MINIMUM AND 0.378 INCHES MAXIMUM0.378 INCHES MAXIMUM IN, thread_class: 2B2B, thread_series: UNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC), pilot_diameter: 0.212 INCHES MINIMUM AND 0.212 INCHES MINIMUM AND 0.217 INCHES MAXIMUM0.217 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-249-2794, 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
BS0A-6440-12
NSN: 5310-01-249-2794
FSC: 5310 — Nuts and Washers
CAGE: 46384 — PENN ENGINEERING & MANUFACTURING CORP (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 7075 OVERALL
nut_styleCLINCHCLINCH
nut_height0.370 INCHES MINIMUM AND 0.370 INCHES MINIMUM AND 0.378 INCHES MAXIMUM0.378 INCHES MAXIMUM IN
thread_class2B2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC)
pilot_diameter0.212 INCHES MINIMUM AND 0.212 INCHES MINIMUM AND 0.217 INCHES MAXIMUM0.217 INCHES MAXIMUM IN
thread_directionRIGHT-HANDRIGHT-HAND
width_across_flats0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
nominal_thread_size0.112 INCHES0.112 INCHES IN
thread_quantity_per_inch4040
material_document_and_classificationQQ-A-250/12,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECTNAVY SPECIAL PROJECT
NSN5310-01-249-2794
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: BS0A-6440-12 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/12,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HANDRIGHT-HAND
•
NOMINAL THREAD SIZE: 0.112 INCHES0.112 INCHES IN
•
PILOT DIAMETER: 0.212 INCHES MINIMUM AND 0.212 INCHES MINIMUM AND 0.217 INCHES MAXIMUM0.217 INCHES MAXIMUM IN
•
NUT HEIGHT: 0.370 INCHES MINIMUM AND 0.370 INCHES MINIMUM AND 0.378 INCHES MAXIMUM0.378 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/12,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HANDRIGHT-HAND
NOMINAL THREAD SIZE0.112 INCHES0.112 INCHES IN
PILOT DIAMETER0.212 INCHES MINIMUM AND 0.212 INCHES MINIMUM AND 0.217 INCHES MAXIMUM0.217 INCHES MAXIMUM IN
NUT HEIGHT0.370 INCHES MINIMUM AND 0.370 INCHES MINIMUM AND 0.378 INCHES MAXIMUM0.378 INCHES MAXIMUM IN
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECTNAVY SPECIAL PROJECT
NUT STYLECLINCHCLINCH
THREAD CLASS2B2B
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 BS0A-6440-12?
BS0A-6440-12 is a NUT,PLAIN,CLINCH.
What is the NSN for BS0A-6440-12?
BS0A-6440-12 is cataloged in the U.S. Government catalog under NSN 5310-01-249-2794. 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.