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PartsTable / COMPONENT / HL19797
HL19797 ✓ 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: STEEL COMP W110 OVERALL, overall_width: 0.188 INCHES NOMINAL IN, overall_height: 0.125 INCHES NOMINAL IN, overall_length: 0.870 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN, hardness_rating: 98.0 ROCKWELL B MAXIMUM OVERALL, style_designator: PLAIN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-054-3211, 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
HL19797
NSN: 5315-00-054-3211
FSC: 5315
CAGE: 79575 — WICO-PRESTOLITE CO THE DIV OF ELTRA CORP (USA)
SPECIFICATIONS
materialSTEEL COMP W110 OVERALL
overall_width0.188 INCHES NOMINAL IN
overall_height0.125 INCHES NOMINAL IN
overall_length0.870 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
hardness_rating98.0 ROCKWELL B MAXIMUM OVERALL
style_designatorPLAIN
starting_edge_shapeSTRAIGHT
material_document_and_classificationQQ-S-0077,GR 3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5315-00-054-3211
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: HL19797 · 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
•
HARDNESS RATING: 98.0 ROCKWELL B MAXIMUM OVERALL
•
STARTING EDGE SHAPE: STRAIGHT
•
MATERIAL: STEEL COMP W110 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-0077,GR 3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
STYLE DESIGNATOR: PLAIN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH0.188 INCHES NOMINAL IN
HARDNESS RATING98.0 ROCKWELL B MAXIMUM OVERALL
OVERALL LENGTH0.870 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
OVERALL HEIGHT0.125 INCHES NOMINAL IN
STARTING EDGE SHAPESTRAIGHT
MATERIALSTEEL COMP W110 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-0077,GR 3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATORPLAIN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
4662Interchangeable
interchangeable cross-reference
interchangeable
256-0179-010Interchangeable
interchangeable cross-reference
interchangeable
30X562Interchangeable
interchangeable cross-reference
interchangeable
12X199Interchangeable
interchangeable cross-reference
interchangeable
3064686Interchangeable
interchangeable cross-reference
interchangeable
E2876PC195Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HL19797?
HL19797 is a KEY,MACHINE.
What parts can replace HL19797?
There are 17 known substitutes for HL19797: 4662, 256-0179-010, 30X562 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HL19797?
HL19797 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-054-3211. 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