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8-10666-1 — PIN,SHOULDER,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

8-10666-1: PIN,SHOULDER,HEADLESS.

The PIN,SHOULDER,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, shank_length: 0.450 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.450 INCHES NOMINAL IN, overall_length: 1.310 INCHES MINIMUM AND 1.350 INCHES MAXIMUM IN, shank_diameter: 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-494-7644, 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
8-10666-1
NSN: 5315-00-494-7644
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 79U29 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OVERALL
shank_length0.450 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN
thread_class3A A
thread_length0.450 INCHES NOMINAL IN
overall_length1.310 INCHES MINIMUM AND 1.350 INCHES MAXIMUM IN
shank_diameter0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN
surface_finish125.000 MICROINCHES OVERALL
first_end_styleCHAMFERED
second_end_stylePOINTED
style_designatorSHOULDER
thread_directionRIGHT-HAND
first_end_locationLONG END
NSN5315-00-494-7644
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 8-10666-1 · 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
•
SHANK DIAMETER: 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN
•
SECOND SHANK DIAMETER: 0.250 INCHES NOMINAL IN
•
SURFACE FINISH: 125.000 MICROINCHES OVERALL
•
FIRST END TAPER LENGTH: 0.030 INCHES NOMINAL IN
•
FIRST END LOCATION: LONG END
•
SECOND END TAPER ANGLE: 60.0 DEGREES NOMINAL
•
THREAD LENGTH: 0.450 INCHES NOMINAL IN
•
FIRST END STYLE: CHAMFERED
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN
SECOND SHANK DIAMETER0.250 INCHES NOMINAL IN
SURFACE FINISH125.000 MICROINCHES OVERALL
FIRST END TAPER LENGTH0.030 INCHES NOMINAL IN
FIRST END LOCATIONLONG END
SECOND END TAPER ANGLE60.0 DEGREES NOMINAL
THREAD LENGTH0.450 INCHES NOMINAL IN
FIRST END STYLECHAMFERED
SHANK LENGTH0.450 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN
STYLE DESIGNATORSHOULDER
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 8-10666-1?
8-10666-1 is a PIN,SHOULDER,HEADLESS.
What is the NSN for 8-10666-1?
8-10666-1 is cataloged in the U.S. Government catalog under NSN 5315-00-494-7644. 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.