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3F31644-103 — PIN,GROOVED,HEADED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

3F31644-103: PIN,GROOVED,HEADED.

The PIN,GROOVED,HEADED is a the manufacturer industrial component. Key specifications include height: 0.100 INCHES NOMINAL IN, diameter: 0.493 INCHES MINIMUM AND 0.499 INCHES MAXIMUM IN, material: STEEL COMP 630 OVERALL, head_style: FLAT, undercut_width: 0.029 INCHES MINIMUM AND 0.032 INCHES MAXIMUM IN, first_end_style: CHAMFERED. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-905-0177, 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
3F31644-103
NSN: 5315-00-905-0177
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
height0.100 INCHES NOMINAL IN
diameter0.493 INCHES MINIMUM AND 0.499 INCHES MAXIMUM IN
materialSTEEL COMP 630 OVERALL
head_styleFLAT
undercut_width0.029 INCHES MINIMUM AND 0.032 INCHES MAXIMUM IN
first_end_styleCHAMFERED
effective_length2.020 INCHES NOMINAL IN
style_designatorGROOVE
pin_head_diameter0.750 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
under_head_length2.100 INCHES NOMINAL IN
undercut_diameter0.466 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
NSN5315-00-905-0177
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3F31644-103 · 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
•
UNDERCUT WIDTH: 0.029 INCHES MINIMUM AND 0.032 INCHES MAXIMUM IN
•
FIRST END TAPER LENGTH: 0.031 INCHES NOMINAL IN
•
UNDERCUT DIAMETER: 0.466 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
•
UNDER HEAD LENGTH: 2.100 INCHES NOMINAL IN
•
FIRST END STYLE: CHAMFERED
•
STYLE DESIGNATOR: GROOVE
•
PIN HEAD DIAMETER: 0.750 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
UNDERCUT WIDTH0.029 INCHES MINIMUM AND 0.032 INCHES MAXIMUM IN
FIRST END TAPER LENGTH0.031 INCHES NOMINAL IN
UNDERCUT DIAMETER0.466 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
UNDER HEAD LENGTH2.100 INCHES NOMINAL IN
FIRST END STYLECHAMFERED
STYLE DESIGNATORGROOVE
PIN HEAD DIAMETER0.750 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
DIAMETER0.493 INCHES MINIMUM AND 0.499 INCHES MAXIMUM IN
FIRST END TAPER ANGLE45.0 DEGREES NOMINAL
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

No substitute or cross-reference records for this part.

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 3F31644-103?
3F31644-103 is a PIN,GROOVED,HEADED.
What is the NSN for 3F31644-103?
3F31644-103 is cataloged in the U.S. Government catalog under NSN 5315-00-905-0177. 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.