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Technical Data Sheet
PartsTable / COMPONENT / 903-12
903-12 ✓ 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

SOCKET,PLUG-IN ELECTRONIC COMPON. Key specifications include material: PLASTIC POLYCARBONATE TUBE, nut_style: HEXAGON, nut_height: 0.125 INCHES NOMINAL IN, flexibility: RIGID, corner_shape: SQUARE ALL CORNERS, hole_diameter: 0.141 INCHES NOMINAL0.141 INCHES NOMINAL 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 5310-00-085-3606, 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
903-12
NSN: 5310-00-085-3606
FSC: 5310
CAGE: 75915 — LITTELFUSE, INC. (USA)
SPECIFICATIONS
materialPLASTIC POLYCARBONATE TUBE
nut_styleHEXAGON
nut_height0.125 INCHES NOMINAL IN
flexibilityRIGID
corner_shapeSQUARE ALL CORNERS
hole_diameter0.141 INCHES NOMINAL0.141 INCHES NOMINAL IN
overall_width0.940 INCHES NOMINAL IN
thread_seriesUNS
exterior_colorCLEAR
inclosure_typeFULLY INCLOSED
overall_height0.125 INCHES NOMINAL0.125 INCHES NOMINAL IN
overall_length3.2000 INCHES NOMINAL IN
NSN5310-00-085-3606
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 903-12 · 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
KEY FEATURES
•
WIDTH ACROSS FLATS: 0.687 INCHES NOMINAL IN
•
BEARING SURFACE TYPE: FLAT
•
THREAD SERIES: UNS
•
THREAD QUANTITY PER INCH: 24
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
NUT STYLE: HEXAGON
•
SURFACE TREATMENT: CHROMATE ZINC OVERALL
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS0.687 INCHES NOMINAL IN
BEARING SURFACE TYPEFLAT
THREAD SERIESUNS
THREAD QUANTITY PER INCH24
NOMINAL THREAD SIZE0.500 INCHES IN
NUT STYLEHEXAGON
SURFACE TREATMENTCHROMATE ZINC OVERALL
MATERIALSTEEL OVERALL
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
44312Interchangeable
interchangeable cross-reference
interchangeable
84403Interchangeable
interchangeable cross-reference
interchangeable
A76093Interchangeable
interchangeable cross-reference
interchangeable
241-20026Interchangeable
interchangeable cross-reference
interchangeable
220-1103-00Interchangeable
interchangeable cross-reference
interchangeable
4182250-009Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 903-12?
903-12 is a SOCKET,PLUG-IN ELECTRONIC COMPON.
What parts can replace 903-12?
There are 20 known substitutes for 903-12: 44312, 84403, A76093 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 903-12?
903-12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-085-3606. 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