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4000009-S-8 — NUT,PLAIN,SPLINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4000009-S-8: NUT,PLAIN,SPLINE.

The NUT,PLAIN,SPLINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1018 OVERALL, nut_style: SPLINE, nut_height: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, nut_diameter: 0.309 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN, pilot_length: 0.065 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN, thread_class: 2B. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-275-3302, 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
4000009-S-8
NSN: 5310-01-275-3302
FSC: 5310 — Nuts and Washers
CAGE: 51506 — ACCURATE SCREW MACHINE CORP DIV ACCURATE SCREW MACHINE CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 1018 OVERALL
nut_styleSPLINE
nut_height0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
nut_diameter0.309 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
pilot_length0.065 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
pilot_diameter0.226 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
nominal_thread_size0.164 INCHES IN
counterbore_diameter0.186 INCHES MINIMUM AND 0.190 INCHES MAXIMUM BOSS IN
NSN5310-01-275-3302
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4000009-S-8 · 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 TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A108,GRADE 1018 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NUT COUNTERBORE DEPTH: 0.214 INCHES MINIMUM AND 0.224 INCHES MAXIMUM BOSS IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.164 INCHES IN
•
NUT DIAMETER: 0.309 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
•
COUNTERBORE DIAMETER: 0.186 INCHES MINIMUM AND 0.190 INCHES MAXIMUM BOSS IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A108,GRADE 1018 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NUT COUNTERBORE DEPTH0.214 INCHES MINIMUM AND 0.224 INCHES MAXIMUM BOSS IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.164 INCHES IN
NUT DIAMETER0.309 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
COUNTERBORE DIAMETER0.186 INCHES MINIMUM AND 0.190 INCHES MAXIMUM BOSS IN
PILOT DIAMETER0.226 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
PILOT LENGTH0.065 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
A3029159Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
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 4000009-S-8?
4000009-S-8 is a NUT,PLAIN,SPLINE.
What parts can replace 4000009-S-8?
There is 1 known substitute for 4000009-S-8: A3029159. Substitute compatibility should be verified for your specific system.
What is the NSN for 4000009-S-8?
4000009-S-8 is cataloged in the U.S. Government catalog under NSN 5310-01-275-3302. This indicates validated use in U.S. government and defense supply chains.
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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.