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PartsTable / COMPONENT / 11176256-4
11176256-4 ✓ 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 8740 OR STEEL COMP H11 OVERALL, nut_style: DOUBLE HEXAGON, temp_rating: 500.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNF, overall_height: 0.355 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 5310-00-463-9227, 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
11176256-4
NSN: 5310-00-463-9227
FSC: 5310
CAGE: 17773 — BALLISTIC MISSILE DEFENSE SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OR STEEL COMP H11 OVERALL
nut_styleDOUBLE HEXAGON
temp_rating500.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
overall_height0.355 INCHES MAXIMUM IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
washer_thickness0.070 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
width_across_flats0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
NSN5310-00-463-9227
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 11176256-4 · 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
•
MATERIAL: STEEL COMP 8740 OR STEEL COMP H11 OVERALL
•
THREAD CLASS: 3B
•
WASHER THICKNESS: 0.070 INCHES NOMINAL IN
•
WASHER OUTSIDE DIAMETER: 0.649 INCHES MAXIMUM IN
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM
•
WIDTH ACROSS FLATS: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 8740 OR STEEL COMP H11 OVERALL
THREAD CLASS3B
WASHER THICKNESS0.070 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER0.649 INCHES MAXIMUM IN
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM
WIDTH ACROSS FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
NOMINAL THREAD SIZE0.375 INCHES IN
SURFACE TREATMENTCADMIUM OVERALL
THREAD DIRECTIONRIGHT-HAND
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6322 ASSN STD 1ST MATERIAL RESPONSE OR AISI ASSN STD 1ST MATERIAL RESPONSE OR AMS6485 ASSN STD 2ND MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
VN406-A-064Interchangeable
interchangeable cross-reference
interchangeable
H23-6Interchangeable
interchangeable cross-reference
interchangeable
BACN10B-L6LInterchangeable
interchangeable cross-reference
interchangeable
F12LH6881-064Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 11176256-4?
11176256-4 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace 11176256-4?
There are 4 known substitutes for 11176256-4: VN406-A-064, H23-6, BACN10B-L6L and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 11176256-4?
11176256-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-463-9227. 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