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PartsTable / COMPONENT / 40027-10
40027-10 ✓ 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 WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL, stock_size: 0.250 IN. DIA IN, inside_width: 1.000 INCHES NOMINAL IN, inside_height: 1.190 INCHES NOMINAL IN, mounting_method: BOLT, special_features: THDS 1/4-28 UNF 3A A.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-367-8636, 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
40027-10
NSN: 5310-00-367-8636
FSC: 5310
CAGE: 98500 — AGC ACQUISITION LLC DIV AGC ACQUISITON LLC (USA)
SPECIFICATIONS
materialSTEEL
stock_size0.250 IN. DIA IN
inside_width1.000 INCHES NOMINAL IN
inside_height1.190 INCHES NOMINAL IN
mounting_methodBOLT
special_featuresTHDS 1/4-28 UNF 3A A
fabrication_methodFORGED
straight_side_formNONROLLER
NSN5310-00-367-8636
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 40027-10 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS6350 ASSN STD 1ST MATERIAL RESPONSE OR AMS6355 ASSN STD 2ND MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 4130 OR STEEL COMP 8630 OVERALL
•
CRITICALITY CODE JUSTIFICATION: FEAT
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONAMS6350 ASSN STD 1ST MATERIAL RESPONSE OR AMS6355 ASSN STD 2ND MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 4130 OR STEEL COMP 8630 OVERALL
SPECIAL FEATURESPER AMS5635 AND AMS 6355
CRITICALITY CODE JUSTIFICATIONFEAT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
74201816-1Interchangeable
interchangeable cross-reference
interchangeable
40027-10Interchangeable
interchangeable cross-reference
interchangeable
40149Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40027-10?
40027-10 is a WASHER,KEY.
What parts can replace 40027-10?
There are 3 known substitutes for 40027-10: 74201816-1, 40027-10, 40149. Substitute compatibility should be verified for your specific system.
What is the NSN for 40027-10?
40027-10 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-367-8636. 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