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PartsTable / COMPONENT / 20T5012
20T5012 ✓ 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 PIN,GROOVED,HEADLESS is a the manufacturer industrial component. Key specifications include diameter: 0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN, material: STEEL OVERALL, overall_length: 2.500 INCHES NOMINAL IN, undercut_width: 0.3062 INCHES NOMINAL IN, hardness_rating: 28.5 ROCKWELL C MINIMUM AND 34.8 ROCKWELL C MAXIMUM OVERALL, undercut_radius: 0.156 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-664-4993, 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
20T5012
NSN: 5315-00-664-4993
FSC: 5315
CAGE: 81336 — CHIEF OF ENGINEERS DEPT OF ARMY (USA)
SPECIFICATIONS
diameter0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
materialSTEEL OVERALL
overall_length2.500 INCHES NOMINAL IN
undercut_width0.3062 INCHES NOMINAL IN
hardness_rating28.5 ROCKWELL C MINIMUM AND 34.8 ROCKWELL C MAXIMUM OVERALL
undercut_radius0.156 INCHES NOMINAL IN
effective_length1.062 INCHES NOMINAL IN
style_designatorGROOVE
undercut_diameter0.6094 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
NSN5315-00-664-4993
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 20T5012 · 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: GROOVE
•
EFFECTIVE LENGTH: 1.062 INCHES NOMINAL IN
•
UNDERCUT DIAMETER: 0.6094 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
•
UNDERCUT WIDTH: 0.3062 INCHES NOMINAL IN
•
HARDNESS RATING: 28.5 ROCKWELL C MINIMUM AND 34.8 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL: STEEL OVERALL
•
DIAMETER: 0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORGROOVE
EFFECTIVE LENGTH1.062 INCHES NOMINAL IN
UNDERCUT DIAMETER0.6094 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
UNDERCUT WIDTH0.3062 INCHES NOMINAL IN
HARDNESS RATING28.5 ROCKWELL C MINIMUM AND 34.8 ROCKWELL C MAXIMUM OVERALL
MATERIALSTEEL OVERALL
DIAMETER0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
OVERALL LENGTH2.500 INCHES NOMINAL IN
UNDERCUT RADIUS0.156 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
158-1Interchangeable
interchangeable cross-reference
interchangeable
158-0001-001Interchangeable
interchangeable cross-reference
interchangeable
28P29Interchangeable
interchangeable cross-reference
interchangeable
1587Interchangeable
interchangeable cross-reference
interchangeable
34465RInterchangeable
interchangeable cross-reference
interchangeable
8636029Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20T5012?
20T5012 is a PIN,GROOVED,HEADLESS.
What parts can replace 20T5012?
There are 15 known substitutes for 20T5012: 158-1, 158-0001-001, 28P29 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20T5012?
20T5012 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-664-4993. 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