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5312057 ✓ 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,SHOULDER,HEADED is a the manufacturer industrial component. Key specifications include height: 0.125 INCHES NOMINAL IN, material: COPPER ALLOY OVERALL, head_style: UNDERCUT UNIVERSAL, first_end_style: RADIUS, style_designator: SHOULDER, first_step_length: 0.031 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-383-9260, 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
5312057
NSN: 5315-00-383-9260
FSC: 5315
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
height0.125 INCHES NOMINAL IN
materialCOPPER ALLOY OVERALL
head_styleUNDERCUT UNIVERSAL
first_end_styleRADIUS
style_designatorSHOULDER
first_step_length0.031 INCHES NOMINAL IN
pin_head_diameter0.406 INCHES NOMINAL IN
third_step_length0.109 INCHES NOMINAL IN
under_head_length0.234 INCHES NOMINAL IN
second_step_length0.094 INCHES NOMINAL IN
first_step_diameter0.344 INCHES NOMINAL IN
third_step_diameter0.261 INCHES NOMINAL IN
NSN5315-00-383-9260
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5312057 · 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
•
UNDER HEAD LENGTH: 0.234 INCHES NOMINAL IN
•
PIN HEAD DIAMETER: 0.406 INCHES NOMINAL IN
•
SECOND STEP LENGTH: 0.094 INCHES NOMINAL IN
•
HEIGHT: 0.125 INCHES NOMINAL IN
•
THIRD STEP DIAMETER: 0.261 INCHES NOMINAL IN
•
FIRST END STYLE: RADIUS
•
FIRST STEP LENGTH: 0.031 INCHES NOMINAL IN
•
SECOND STEP DIAMETER: 0.275 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
UNDER HEAD LENGTH0.234 INCHES NOMINAL IN
PIN HEAD DIAMETER0.406 INCHES NOMINAL IN
SECOND STEP LENGTH0.094 INCHES NOMINAL IN
HEIGHT0.125 INCHES NOMINAL IN
THIRD STEP DIAMETER0.261 INCHES NOMINAL IN
FIRST END STYLERADIUS
FIRST STEP LENGTH0.031 INCHES NOMINAL IN
SECOND STEP DIAMETER0.275 INCHES NOMINAL IN
THIRD STEP LENGTH0.109 INCHES NOMINAL IN
HEAD STYLEUNDERCUT UNIVERSAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
18750-15Interchangeable
interchangeable cross-reference
interchangeable
673033Interchangeable
interchangeable cross-reference
interchangeable
307ND5059Interchangeable
interchangeable cross-reference
interchangeable
218-21671-3Interchangeable
interchangeable cross-reference
interchangeable
852802Interchangeable
interchangeable cross-reference
interchangeable
116-162Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5312057?
5312057 is a PIN,SHOULDER,HEADED.
What parts can replace 5312057?
There are 17 known substitutes for 5312057: 18750-15, 673033, 307ND5059 and 14 more. Substitute compatibility should be verified for your specific system.
Is 5312057 still available?
5312057 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