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KW12129 ✓ 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

The WASHER,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.212 INCHES MINIMUM AND 0.214 INCHES MAXIMUM IN, surface_finish: 100.0 MICROINCHES ALL SURFACES, shoulder_height: 0.055 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN, outside_diameter: 1.184 INCHES MINIMUM AND 1.186 INCHES MAXIMUM IN, style_designator: SHOULDERED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-808-2127, 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
KW12129
NSN: 5310-00-808-2127
FSC: 5310
CAGE: 02250 — CURTISS-WRIGHT CONTROLS INTEGRATED SENSING, INC. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.212 INCHES MINIMUM AND 0.214 INCHES MAXIMUM IN
surface_finish100.0 MICROINCHES ALL SURFACES
shoulder_height0.055 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
outside_diameter1.184 INCHES MINIMUM AND 1.186 INCHES MAXIMUM IN
style_designatorSHOULDERED
shoulder_diameter0.906 INCHES MINIMUM AND 0.916 INCHES MAXIMUM IN
surface_treatmentANODIZE OVERALL
material_document_and_classificationAMS 6322 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6323 ASSN STD 2ND MATERIAL RESPONSE OVERALL
NSN5310-00-808-2127
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: KW12129 · 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
•
SHOULDER HEIGHT: 0.055 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6322 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6323 ASSN STD 2ND MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: ANODIZE OVERALL
•
STYLE DESIGNATOR: SHOULDERED
•
SURFACE FINISH: 100.0 MICROINCHES ALL SURFACES
•
MATERIAL: STEEL OVERALL
•
SHOULDER DIAMETER: 0.906 INCHES MINIMUM AND 0.916 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.212 INCHES MINIMUM AND 0.214 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SHOULDER HEIGHT0.055 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6322 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6323 ASSN STD 2ND MATERIAL RESPONSE OVERALL
SURFACE TREATMENTANODIZE OVERALL
STYLE DESIGNATORSHOULDERED
SURFACE FINISH100.0 MICROINCHES ALL SURFACES
MATERIALSTEEL OVERALL
SHOULDER DIAMETER0.906 INCHES MINIMUM AND 0.916 INCHES MAXIMUM IN
HOLE DIAMETER0.212 INCHES MINIMUM AND 0.214 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.184 INCHES MINIMUM AND 1.186 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
9N18186Interchangeable
interchangeable cross-reference
interchangeable
160920Interchangeable
interchangeable cross-reference
interchangeable
125-3788Interchangeable
interchangeable cross-reference
interchangeable
150 29/64Interchangeable
interchangeable cross-reference
interchangeable
D102 1151Interchangeable
interchangeable cross-reference
interchangeable
206 29/64Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is KW12129?
KW12129 is a WASHER,SHOULDERED.
What parts can replace KW12129?
There are 15 known substitutes for KW12129: 9N18186, 160920, 125-3788 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for KW12129?
KW12129 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-808-2127. 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