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Technical Data Sheet
PartsTable / COMPONENT / 1A9726
1A9726 ✓ 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 STRAINER,SEDIMENT is a the manufacturer industrial component. Key specifications include end_item_identification: C17 AIRCRAFT ENGINE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-290-6128, 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
1A9726
NSN: 5315-00-290-6128
FSC: 5315
CAGE: 95201 — NAPCO INTERNATIONAL LLC DBA NAPCO INTERNATIONAL INC (USA)
SPECIFICATIONS
end_item_identificationC17 AIRCRAFT ENGINE
NSN5315-00-290-6128
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1A9726 · 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
•
HEAD STYLE: FLAT
•
CHAMFER LENGTH: 0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
•
DIAMETER: 0.319 INCHES MINIMUM AND 0.321 INCHES MAXIMUM IN
•
PIN HEAD DIAMETER: 0.433 INCHES MINIMUM AND 0.443 INCHES MAXIMUM IN
•
HEIGHT: 0.089 INCHES MINIMUM AND 0.099 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
•
UNDER HEAD LENGTH: 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1015 OR STEEL COMP 1120 OR STEEL COMP 1112 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEFLAT
CHAMFER LENGTH0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
DIAMETER0.319 INCHES MINIMUM AND 0.321 INCHES MAXIMUM IN
PIN HEAD DIAMETER0.433 INCHES MINIMUM AND 0.443 INCHES MAXIMUM IN
HEIGHT0.089 INCHES MINIMUM AND 0.099 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
UNDER HEAD LENGTH0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1015 OR STEEL COMP 1120 OR STEEL COMP 1112 OVERALL
STYLE DESIGNATORSTRAIGHT
PIN CHAMFER ANGLE45.0 DEGREES NOMINAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
55257Interchangeable
interchangeable cross-reference
interchangeable
683RH-1/2-1/2SInterchangeable
interchangeable cross-reference
interchangeable
SF-16Interchangeable
interchangeable cross-reference
interchangeable
55257-000Interchangeable
interchangeable cross-reference
interchangeable
RNA6905Interchangeable
interchangeable cross-reference
interchangeable
516 3206Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1A9726?
1A9726 is a STRAINER,SEDIMENT.
What parts can replace 1A9726?
There are 11 known substitutes for 1A9726: 55257, 683RH-1/2-1/2S, SF-16 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1A9726?
1A9726 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-290-6128. 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