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Technical Data Sheet
PartsTable / COMPONENT / A-9664
A-9664 ✓ 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,STRAIGHT,HEADED is a the manufacturer industrial component. Key specifications include height: 0.031 INCHES NOMINAL IN, diameter: 0.140 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING OVERALL, head_style: FLAT, chamfer_length: 0.125 INCHES NOMINAL IN, style_designator: STRAIGHT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-664-2663, 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
A-9664
NSN: 5315-00-664-2663
FSC: 5315
CAGE: 55469 — ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES (USA)
SPECIFICATIONS
height0.031 INCHES NOMINAL IN
diameter0.140 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING OVERALL
head_styleFLAT
chamfer_length0.125 INCHES NOMINAL IN
style_designatorSTRAIGHT
pin_chamfer_angle20.0 DEGREES NOMINAL
pin_head_diameter0.250 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
under_head_length1.000 INCHES NOMINAL IN
NSN5315-00-664-2663
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A-9664 · 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: 1.000 INCHES NOMINAL IN
•
CHAMFER LENGTH: 0.125 INCHES NOMINAL IN
•
HEIGHT: 0.031 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT
•
PIN CHAMFER ANGLE: 20.0 DEGREES NOMINAL
•
HEAD STYLE: FLAT
•
DIAMETER: 0.140 INCHES NOMINAL IN
•
PIN HEAD DIAMETER: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
UNDER HEAD LENGTH1.000 INCHES NOMINAL IN
CHAMFER LENGTH0.125 INCHES NOMINAL IN
HEIGHT0.031 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT
PIN CHAMFER ANGLE20.0 DEGREES NOMINAL
HEAD STYLEFLAT
DIAMETER0.140 INCHES NOMINAL IN
PIN HEAD DIAMETER0.250 INCHES NOMINAL IN
MATERIALSTEEL CORROSION RESISTING OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
A570Interchangeable
interchangeable cross-reference
interchangeable
MIL-T-26922Interchangeable
interchangeable cross-reference
interchangeable
A/M24T-8()Interchangeable
interchangeable cross-reference
interchangeable
7023590Interchangeable
interchangeable cross-reference
interchangeable
26231Interchangeable
interchangeable cross-reference
interchangeable
52230Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-9664?
A-9664 is a PIN,STRAIGHT,HEADED.
What parts can replace A-9664?
There are 13 known substitutes for A-9664: A570, MIL-T-26922, A/M24T-8() and 10 more. Substitute compatibility should be verified for your specific system.
Is A-9664 still available?
A-9664 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