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MAS11731 ✓ 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 PIN,COTTER is a the manufacturer industrial component. Key specifications include diameter: 0.250 INCHES NOMINAL IN, material: STEEL OVERALL, style_designator: STANDARD, underloop_length: 2.000 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 5315-00-010-3422, 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
MAS11731
NSN: 5315-00-010-3422
FSC: 5315
CAGE: U7887 — NP AEROSPACE LIMITED (GBR)
SPECIFICATIONS
diameter0.250 INCHES NOMINAL IN
materialSTEEL OVERALL
style_designatorSTANDARD
underloop_length2.000 INCHES NOMINAL IN
NSN5315-00-010-3422
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MAS11731 · 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
•
MATERIAL: STEEL OVERALL
•
DIAMETER: 0.250 INCHES NOMINAL IN
•
UNDERLOOP LENGTH: 2.000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STANDARD
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
DIAMETER0.250 INCHES NOMINAL IN
UNDERLOOP LENGTH2.000 INCHES NOMINAL IN
STYLE DESIGNATORSTANDARD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 32
103408Interchangeable
interchangeable cross-reference
interchangeable
9X1123-16Interchangeable
interchangeable cross-reference
interchangeable
900810Interchangeable
interchangeable cross-reference
interchangeable
0900813-7Interchangeable
interchangeable cross-reference
interchangeable
103411Interchangeable
interchangeable cross-reference
interchangeable
804881Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MAS11731?
MAS11731 is a PIN,COTTER.
What parts can replace MAS11731?
There are 32 known substitutes for MAS11731: 103408, 9X1123-16, 900810 and 29 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MAS11731?
MAS11731 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-010-3422. 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