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64127W4 — Technical Data Sheet

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— · 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

The WASHER,SPECIAL is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System under NSN 5310-00-911-0959, 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
64127W4
NSN: 5310-00-911-0959
FSC: 5310
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
Part Number64127W4
NSN5310-00-911-0959
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 64127W4 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
76-1104InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
KC65W010-118InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
K284InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
7611 ITEM NO 4InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
7611InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 64127W4?
64127W4 is a WASHER,SPECIAL.
What parts can replace 64127W4?
There are 5 known substitutes for 64127W4: 76-1104, KC65W010-118, K284 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 64127W4?
64127W4 is cataloged in the Federal Logistics Information System under NSN 5310-00-911-0959. 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: October 2026