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2166576 — PIN,GROOVED,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2166576: PIN,GROOVED,HEADLESS.

The PIN,GROOVED,HEADLESS is a the manufacturer industrial component. Key specifications include diameter: 0.1705 INCHES MINIMUM AND 0.1710 INCHES MAXIMUM IN, material: STEEL COMP 420 OVERALL, overall_length: 0.915 INCHES MINIMUM AND 0.923 INCHES MAXIMUM IN, surface_finish: 32.0 MICROINCHES OUTSIDE DIAMETER, undercut_width: 0.035 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN, first_end_style: CHAMFERED. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-989-4655, 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
2166576
NSN: 5315-00-989-4655
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
diameter0.1705 INCHES MINIMUM AND 0.1710 INCHES MAXIMUM IN
materialSTEEL COMP 420 OVERALL
overall_length0.915 INCHES MINIMUM AND 0.923 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES OUTSIDE DIAMETER
undercut_width0.035 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
first_end_styleCHAMFERED
hardness_rating50.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM OVERALL
effective_length0.818 INCHES NOMINAL IN
second_end_styleROUND
style_designatorGROOVE
surface_treatmentPASSIVATE OVERALL
undercut_diameter0.130 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
NSN5315-00-989-4655
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2166576 · 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
•
SURFACE FINISH: 32.0 MICROINCHES OUTSIDE DIAMETER
•
UNDERCUT WIDTH: 0.035 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
•
FIRST END TAPER LENGTH: 0.031 INCHES NOMINAL IN
•
UNDERCUT DIAMETER: 0.130 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
•
FIRST END LOCATION: SHANK END
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-STD-171,FINISH 5.4.1 MIL STD SINGLE TREATMENT RESPONSE OVERALL
•
FIRST END STYLE: CHAMFERED
•
HARDNESS RATING: 50.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES OUTSIDE DIAMETER
UNDERCUT WIDTH0.035 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
FIRST END TAPER LENGTH0.031 INCHES NOMINAL IN
UNDERCUT DIAMETER0.130 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
FIRST END LOCATIONSHANK END
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-STD-171,FINISH 5.4.1 MIL STD SINGLE TREATMENT RESPONSE OVERALL
FIRST END STYLECHAMFERED
HARDNESS RATING50.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM OVERALL
STYLE DESIGNATORGROOVE
DIAMETER0.1705 INCHES MINIMUM AND 0.1710 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES 2
5315009894655Reference document
Same NSN cross-reference
Reference document — Informative reference only
588.10-300000-008Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2166576?
2166576 is a PIN,GROOVED,HEADLESS.
What parts can replace 2166576?
There are 2 known substitutes for 2166576: 5315009894655, 588.10-300000-008. Substitute compatibility should be verified for your specific system.
What is the NSN for 2166576?
2166576 is cataloged in the U.S. Government catalog under NSN 5315-00-989-4655. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.