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PartsTable / COMPONENT / AM421S4400-1022157PC160
AM421S4400-1022157PC160 ✓ 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 COMP 304 OVERALL, hole_diameter: 1.131 INCHES MINIMUM AND 1.151 INCHES MAXIMUM IN, outside_diameter: 1.312 INCHES NOMINAL IN, special_features: NONMAGNETIC, style_designator: KEY, surface_treatment: PASSIVATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-584-7204, 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
AM421S4400-1022157PC160
NSN: 5310-00-584-7204
FSC: 5310
CAGE: 81601 — NORFOLK NAVAL SHIPYARD (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
hole_diameter1.131 INCHES MINIMUM AND 1.151 INCHES MAXIMUM IN
outside_diameter1.312 INCHES NOMINAL IN
special_featuresNONMAGNETIC
style_designatorKEY
surface_treatmentPASSIVATE OVERALL
material_thickness0.047 INCHES NOMINAL IN
external_key_quantity16
external_straight_key_width0.156 INCHES NOMINAL IN
overall_distance_including_keys1.687 INCHES NOMINAL IN
material_document_and_classificationMIL-S-5059,1/4 HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-584-7204
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AM421S4400-1022157PC160 · 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
•
HOLE DIAMETER: 1.131 INCHES MINIMUM AND 1.151 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 1.687 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 1.312 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5059,1/4 HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 304 OVERALL
•
EXTERNAL KEY QUANTITY: 16
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER1.131 INCHES MINIMUM AND 1.151 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS1.687 INCHES NOMINAL IN
OUTSIDE DIAMETER1.312 INCHES NOMINAL IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059,1/4 HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 304 OVERALL
EXTERNAL KEY QUANTITY16
SPECIAL FEATURESNONMAGNETIC
SURFACE TREATMENTPASSIVATE OVERALL
MATERIAL THICKNESS0.047 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
0042-6Interchangeable
interchangeable cross-reference
interchangeable
485970-1Interchangeable
interchangeable cross-reference
interchangeable
88748-1Interchangeable
interchangeable cross-reference
interchangeable
CERAMIGOLDInterchangeable
interchangeable cross-reference
interchangeable
6834-00040Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AM421S4400-1022157PC160?
AM421S4400-1022157PC160 is a WASHER,KEY.
What parts can replace AM421S4400-1022157PC160?
There are 5 known substitutes for AM421S4400-1022157PC160: 0042-6, 485970-1, 88748-1 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AM421S4400-1022157PC160?
AM421S4400-1022157PC160 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-584-7204. 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