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BACN10HY4M — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

BACN10HY4M: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL COMP 8740 NUT, nut_style: DOUBLE HEXAGON, nut_height: 0.263 INCHES NOMINAL IN, lubrication: DRY FILM LUBRICANT, temp_rating: 450.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-959-4688, 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
BACN10HY4M
NSN: 5310-00-959-4688
NIINs: 009594688, 014346615
FSC: 5310 — Nuts and Washers
CAGE: 15655 — MASONITE CORP COMMERCIAL DIV (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 NUT
nut_styleDOUBLE HEXAGON
nut_height0.263 INCHES NOMINAL IN
lubricationDRY FILM LUBRICANT
temp_rating450.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
overall_height0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
hardness_rating35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
washer_thickness0.072 INCHES MINIMUM AND 0.087 INCHES MAXIMUM IN
NSN5310-00-959-4688
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: BACN10HY4M · 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
•
WASHER OUTSIDE DIAMETER: 0.460 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.274 INCHES MINIMUM AND 0.284 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE NUT
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.274 INCHES MINIMUM AND 0.294 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER0.460 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.274 INCHES MINIMUM AND 0.284 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE NUT
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NUT HEIGHT0.263 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
SUBSTITUTES & CROSS-REFERENCES 6
BACHN10HY4MReference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
BACN10FZ4Reference document
Same NSN cross-reference
Reference document — Secondary reference
TLN1000-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
LH6094-048Reference document
Same NSN cross-reference
Reference document — Secondary reference
55342-428Reference document
Same NSN cross-reference
Reference document — Secondary reference
BACN10HYReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is BACN10HY4M?
BACN10HY4M is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace BACN10HY4M?
There are 6 known substitutes for BACN10HY4M: BACHN10HY4M, BACN10FZ4, TLN1000-4 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BACN10HY4M?
BACN10HY4M is cataloged in the U.S. Government catalog under NSN 5310-00-959-4688. 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.