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PartsTable / COMPONENT / 13257-1
13257-1 ✓ 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 ASSEMBLY is a the manufacturer industrial component. Key specifications include length: 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT, material: ALUMINUM ALLOY 2024, overall_width: 2.500 INCHES NOMINAL IN, heat_treatment: T-4 SOLUTION HEAT TREATED, overall_height: 2.500 INCHES NOMINAL IN, first_tip_style: RIGHT QUARTER RADIUS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-076-5756, 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
13257-1
NSN: 5315-00-076-5756
FSC: 5315
CAGE: 06481 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP (USA)
SPECIFICATIONS
length10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT
materialALUMINUM ALLOY 2024
overall_width2.500 INCHES NOMINAL IN
heat_treatmentT-4 SOLUTION HEAT TREATED
overall_height2.500 INCHES NOMINAL IN
first_tip_styleRIGHT QUARTER RADIUS
first_tip_radius0.125 INCHES NOMINAL IN
second_tip_styleUPPER RADIUS
basic_shape_styleANGLE
left_inside_angle90.0 DEGREES NOMINAL
second_tip_radius0.125 INCHES NOMINAL IN
fabrication_methodEXTRUDED
NSN5315-00-076-5756
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 13257-1 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
3998Interchangeable
interchangeable cross-reference
interchangeable
HA24Interchangeable
interchangeable cross-reference
interchangeable
QQ-A-200/3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 13257-1?
13257-1 is a PIN ASSEMBLY.
What parts can replace 13257-1?
There are 3 known substitutes for 13257-1: 3998, HA24, QQ-A-200/3. Substitute compatibility should be verified for your specific system.
Is 13257-1 still available?
13257-1 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