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PartsTable / MRO / K129-1
K129-1 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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 NETWORK,PHASE CHANGING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OR COPPER ALLOY CASE, duty_type: CONTINUOUS, time_delay: 0.013 SECONDS NOMINAL FIXED OPERATE TIME, storage_type: GENERAL PURPOSE WAREHOUSE, thread_class: 2A SINGLE MOUNTING FACILITY A, overall_width: 0.910 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-227-4881, 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
MRO→ MRO_GENERAL→ K129-1
NSN: 5310-00-227-4881
FSC: 5310
CAGE: 18965 — DYNAMIC AIR ENGINEERING, INC. (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OR COPPER ALLOY CASE
duty_typeCONTINUOUS
time_delay0.013 SECONDS NOMINAL FIXED OPERATE TIME
storage_typeGENERAL PURPOSE WAREHOUSE
thread_class2A SINGLE MOUNTING FACILITY A
coil_quantity1
overall_width0.910 INCHES MAXIMUM IN
thread_length0.312 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
overall_height1.593 INCHES NOMINAL IN
overall_length1.156 INCHES MAXIMUM IN
fragility_factorMODERATELY RUGGED
special_featuresENCASED;1.757 IN. NOM BODY LG;1.757 IN. NOM BODY WD;FOUR 0.190-32 UNF THD MTG STUDS SPACED 1.125 IN C TO C IN
NSN5310-00-227-4881
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: K129-1 · 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 10
EWC5431Interchangeable
interchangeable cross-reference
interchangeable
K1291Interchangeable
interchangeable cross-reference
interchangeable
215821Interchangeable
interchangeable cross-reference
interchangeable
921560-1Interchangeable
interchangeable cross-reference
interchangeable
KHS17D11-24VDCInterchangeable
interchangeable cross-reference
interchangeable
25220115Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is K129-1?
K129-1 is a NETWORK,PHASE CHANGING. It is classified as a MRO (MRO_GENERAL).
What parts can replace K129-1?
There are 10 known substitutes for K129-1: EWC5431, K1291, 215821 and 7 more. Substitute compatibility should be verified for your specific system.
Is K129-1 still available?
K129-1 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026