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PartsTable / COMPONENT / 1681416
1681416 ✓ 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,HEADED is a the manufacturer industrial component. Key specifications include height: 0.125 INCHES NOMINAL IN, diameter: 0.309 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN, material: STEEL OVERALL, head_style: PAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION), undercut_width: 0.052 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN, effective_length: 0.823 INCHES MINIMUM AND 0.833 INCHES MAXIMUM 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 5315-00-033-6022, 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
1681416
NSN: 5315-00-033-6022
FSC: 5315
CAGE: 27996 — HEIL ENVIRONMENTAL INDUSTRIES (USA)
SPECIFICATIONS
height0.125 INCHES NOMINAL IN
diameter0.309 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN
materialSTEEL OVERALL
head_stylePAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION)
undercut_width0.052 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN
effective_length0.823 INCHES MINIMUM AND 0.833 INCHES MAXIMUM IN
style_designatorGROOVE
features_providedCASEHARDENED
pin_head_diameter0.375 INCHES NOMINAL IN
under_head_length1.031 INCHES NOMINAL IN
undercut_diameter0.219 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN
NSN5315-00-033-6022
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1681416 · 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
•
PIN HEAD DIAMETER: 0.375 INCHES NOMINAL IN
•
HEIGHT: 0.125 INCHES NOMINAL IN
•
FEATURES PROVIDED: CASEHARDENED
•
UNDER HEAD LENGTH: 1.031 INCHES NOMINAL IN
•
DIAMETER: 0.309 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN
•
HEAD STYLE: PAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION)
•
MATERIAL: STEEL OVERALL
•
EFFECTIVE LENGTH: 0.823 INCHES MINIMUM AND 0.833 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
PIN HEAD DIAMETER0.375 INCHES NOMINAL IN
HEIGHT0.125 INCHES NOMINAL IN
FEATURES PROVIDEDCASEHARDENED
UNDER HEAD LENGTH1.031 INCHES NOMINAL IN
DIAMETER0.309 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN
HEAD STYLEPAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION)
MATERIALSTEEL OVERALL
EFFECTIVE LENGTH0.823 INCHES MINIMUM AND 0.833 INCHES MAXIMUM IN
STYLE DESIGNATORGROOVE
UNDERCUT WIDTH0.052 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
SP79020Interchangeable
interchangeable cross-reference
interchangeable
NASM24665Interchangeable
interchangeable cross-reference
interchangeable
MS24665-338Interchangeable
interchangeable cross-reference
interchangeable
H9362Interchangeable
interchangeable cross-reference
interchangeable
1829Interchangeable
interchangeable cross-reference
interchangeable
1871AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1681416?
1681416 is a PIN,GROOVED,HEADED.
What parts can replace 1681416?
There are 7 known substitutes for 1681416: SP79020, NASM24665, MS24665-338 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1681416?
1681416 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-033-6022. 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