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Technical Data Sheet
PartsTable / COMPONENT / 10P381-2-12
10P381-2-12 ✓ 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 PIN,COTTER is a the manufacturer industrial component. Key specifications include diameter: 0.056 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN, material: STEEL COMP 302 OR STEEL COMP 304 OVERALL, point_type: EXTENDED PRONG SQUARE CUT, hardness_rating: 65.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 78.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM OVERALL, style_designator: STANDARD, underloop_length: 0.688 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-234-1854, 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
10P381-2-12
NSN: 5315-00-234-1854
FSC: 5315
CAGE: 0JRC1 — NORTHROP GRUMMAN TECHNICAL SERVICES, INC. DBA DEFENSE SYSTEMS SECTOR (USA)
SPECIFICATIONS
diameter0.056 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
materialSTEEL COMP 302 OR STEEL COMP 304 OVERALL
point_typeEXTENDED PRONG SQUARE CUT
hardness_rating65.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 78.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM OVERALL
style_designatorSTANDARD
underloop_length0.688 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
end_item_identificationMRAP RG-33 AND RG-33 AUV; MULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
material_document_and_classificationASTM A493 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5315-00-234-1854
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 10P381-2-12 · 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
•
DIAMETER: 0.056 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
•
POINT TYPE: EXTENDED PRONG SQUARE CUT
•
MATERIAL: STEEL COMP 302 OR STEEL COMP 304 OVERALL
•
STYLE DESIGNATOR: STANDARD
•
UNDERLOOP LENGTH: 0.688 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A493 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
HARDNESS RATING: 65.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 78.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
DIAMETER0.056 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
POINT TYPEEXTENDED PRONG SQUARE CUT
END ITEM IDENTIFICATIONMRAP RG-33 AND RG-33 AUV; MULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
MATERIALSTEEL COMP 302 OR STEEL COMP 304 OVERALL
STYLE DESIGNATORSTANDARD
UNDERLOOP LENGTH0.688 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A493 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HARDNESS RATING65.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 78.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
AN500-8-5Interchangeable
interchangeable cross-reference
interchangeable
31037S7Interchangeable
interchangeable cross-reference
interchangeable
A1647Interchangeable
interchangeable cross-reference
interchangeable
MS24665-153Interchangeable
interchangeable cross-reference
interchangeable
10353714Interchangeable
interchangeable cross-reference
interchangeable
5315PL1988112Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 10P381-2-12?
10P381-2-12 is a PIN,COTTER.
What parts can replace 10P381-2-12?
There are 14 known substitutes for 10P381-2-12: AN500-8-5, 31037S7, A1647 and 11 more. Substitute compatibility should be verified for your specific system.
Is 10P381-2-12 still available?
10P381-2-12 is currently cancelled.
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Last verified: July 2026