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Technical Data Sheet
PartsTable / COMPONENT / L-12
L-12 ✓ 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 HEATER,WATER,LIQUID FUEL is a the manufacturer industrial component. Key specifications include cushion: NOT INCLUDED, material: COPPER OVERALL, thickness: 0.240 INCHES NOMINAL IN, body_style: FLEXIBLE KEYWAY INSERT TYPE, THROUGH BORE, bore_shape: STRAIGHT, temp_rating: -35.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-011-6121, 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
L-12
NSN: 5310-00-011-6121
FSC: 5310
CAGE: 72540 — DAYTON-WALTHER CORP (USA)
SPECIFICATIONS
cushionNOT INCLUDED
materialCOPPER OVERALL
thickness0.240 INCHES NOMINAL IN
body_styleFLEXIBLE KEYWAY INSERT TYPE, THROUGH BORE
bore_shapeSTRAIGHT
temp_rating-35.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF
mounting_padNOT INCLUDED
thread_class2A FIRST END A
bore_diameter0.2500 INCHES NOMINAL IN
overall_width0.375 INCHES NOMINAL IN
overall_length0.812 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL PIPE SECOND END
NSN5310-00-011-6121
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: L-12 · 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 19
103323Interchangeable
interchangeable cross-reference
interchangeable
92-8Interchangeable
interchangeable cross-reference
interchangeable
116121Interchangeable
interchangeable cross-reference
interchangeable
1-2 RInterchangeable
Wash34
interchangeable
120384Interchangeable
Wash34
interchangeable
W-1050-HInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is L-12?
L-12 is a HEATER,WATER,LIQUID FUEL.
What parts can replace L-12?
There are 19 known substitutes for L-12: 103323, 92-8, 116121 and 16 more. Substitute compatibility should be verified for your specific system.
Is L-12 still available?
L-12 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