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PartsTable / COMPONENT / KY-1537
KY-1537 ✓ 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 KEY,MACHINE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY K-500 OVERALL, overall_width: 0.190 INCHES NOMINAL IN, overall_height: 0.190 INCHES NOMINAL IN, overall_length: 1.132 INCHES NOMINAL IN, style_designator: PLAIN, material_document_and_classification: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE 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 5315-01-416-5492, 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
KY-1537
NSN: 5315-01-416-5492
FSC: 5315
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialNICKEL ALLOY K-500 OVERALL
overall_width0.190 INCHES NOMINAL IN
overall_height0.190 INCHES NOMINAL IN
overall_length1.132 INCHES NOMINAL IN
style_designatorPLAIN
material_document_and_classificationQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5315-01-416-5492
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: KY-1537 · 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
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: NICKEL ALLOY K-500 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT0.190 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALNICKEL ALLOY K-500 OVERALL
OVERALL WIDTH0.190 INCHES NOMINAL IN
OVERALL LENGTH1.132 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
P-157Interchangeable
interchangeable cross-reference
interchangeable
PL-1581 ITEM NO. 7Interchangeable
interchangeable cross-reference
interchangeable
PL-1581Interchangeable
interchangeable cross-reference
interchangeable
KL1537Interchangeable
Same NIIN cross-reference
interchangeable
PL-1537 PIECE 7Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is KY-1537?
KY-1537 is a KEY,MACHINE.
What parts can replace KY-1537?
There are 5 known substitutes for KY-1537: P-157, PL-1581 ITEM NO. 7, PL-1581 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for KY-1537?
KY-1537 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-416-5492. 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