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PartsTable / COMPONENT / LS12906-42
LS12906-42 ✓ 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,FLAT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 260 OR COPPER ALLOY 268 OVERALL, thickness: 0.032 INCHES NOMINAL IN, hole_diameter: 0.125 INCHES NOMINAL IN, overall_diameter: 0.307 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN, test_data_document: 36659-LCP 72-1238 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.)., special_test_features: MAX MAGNETIC CONTAMINATION PERMITTED 0.8 GAMMA AT 1.0 IN. IN.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-169-8268, 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
LS12906-42
NSN: 5310-01-169-8268
FSC: 5310
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
materialCOPPER ALLOY 260 OR COPPER ALLOY 268 OVERALL
thickness0.032 INCHES NOMINAL IN
hole_diameter0.125 INCHES NOMINAL IN
overall_diameter0.307 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
test_data_document36659-LCP 72-1238 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
special_test_featuresMAX MAGNETIC CONTAMINATION PERMITTED 0.8 GAMMA AT 1.0 IN. IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
criticality_code_justificationSPCL
material_document_and_classificationQQ-B-613 FED SPEC ALL MATERIAL RESPONSES OVERALL
reference_number_differentiating_characteristicsAS DIFFERENTIATED BY TEST FOR MAGNETIC CONTAMINATION
NSN5310-01-169-8268
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: LS12906-42 · 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
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: AS DIFFERENTIATED BY TEST FOR MAGNETIC CONTAMINATION
•
THICKNESS: 0.032 INCHES NOMINAL IN
•
CRITICALITY CODE JUSTIFICATION: SPCL
•
TEST DATA DOCUMENT: 36659-LCP 72-1238 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SPECIAL TEST FEATURES: MAX MAGNETIC CONTAMINATION PERMITTED 0.8 GAMMA AT 1.0 IN. IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
OVERALL DIAMETER: 0.307 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSAS DIFFERENTIATED BY TEST FOR MAGNETIC CONTAMINATION
THICKNESS0.032 INCHES NOMINAL IN
CRITICALITY CODE JUSTIFICATIONSPCL
TEST DATA DOCUMENT36659-LCP 72-1238 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SPECIAL TEST FEATURESMAX MAGNETIC CONTAMINATION PERMITTED 0.8 GAMMA AT 1.0 IN. IN
CENTER HOLE SHAPE STYLEROUND
OVERALL DIAMETER0.307 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
HOLE DIAMETER0.125 INCHES NOMINAL IN
MATERIALCOPPER ALLOY 260 OR COPPER ALLOY 268 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
MS15795-904Interchangeable
interchangeable cross-reference
interchangeable
MS15795-64Interchangeable
interchangeable cross-reference
interchangeable
AN960B4Interchangeable
interchangeable cross-reference
interchangeable
FFW92Interchangeable
interchangeable cross-reference
interchangeable
8176678Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is LS12906-42?
LS12906-42 is a WASHER,FLAT.
What parts can replace LS12906-42?
There are 5 known substitutes for LS12906-42: MS15795-904, MS15795-64, AN960B4 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for LS12906-42?
LS12906-42 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-169-8268. 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