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Technical Data Sheet
PartsTable / COMPONENT / BH00783-6
BH00783-6 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL COMP 4130 OR STEEL COMP 4340 OR STEEL COMP 8740 NUT, nut_style: DOUBLE HEXAGON, temp_rating: 250.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), overall_height: 0.443 INCHES MINIMUM AND 0.463 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-124-5793, 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
BH00783-6
NSN: 5310-01-124-5793
FSC: 5310
CAGE: 27238 — BRISTOL INDUSTRIES, LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OR STEEL COMP 4340 OR STEEL COMP 8740 NUT
nut_styleDOUBLE HEXAGON
temp_rating250.0 FAHRENHEIT MAXIMUM DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
overall_height0.443 INCHES MINIMUM AND 0.463 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
washer_thickness0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE OVERALL EXCEPT INSERT
width_across_flats0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
nominal_thread_size0.375 INCHES IN
NSN5310-01-124-5793
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: BH00783-6 · 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
•
THREAD DIRECTION: RIGHT-HAND
•
WASHER THICKNESS: 0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
•
THREAD QUANTITY PER INCH: 24
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL EXCEPT INSERT
•
MATERIAL: STEEL COMP 4130 OR STEEL COMP 4340 OR STEEL COMP 8740 NUT
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE NUT
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
WIDTH ACROSS FLATS: 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
WASHER THICKNESS0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH24
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL EXCEPT INSERT
MATERIALSTEEL COMP 4130 OR STEEL COMP 4340 OR STEEL COMP 8740 NUT
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE NUT
NOMINAL THREAD SIZE0.375 INCHES IN
WIDTH ACROSS FLATS0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
NUT STYLEDOUBLE HEXAGON
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
244241R91Interchangeable
interchangeable cross-reference
interchangeable
AF3-1Interchangeable
interchangeable cross-reference
interchangeable
42716Interchangeable
interchangeable cross-reference
interchangeable
08-0K43Interchangeable
interchangeable cross-reference
interchangeable
4356DMInterchangeable
interchangeable cross-reference
interchangeable
3-3716Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BH00783-6?
BH00783-6 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace BH00783-6?
There are 8 known substitutes for BH00783-6: 244241R91, AF3-1, 42716 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BH00783-6?
BH00783-6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-124-5793. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026