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SOS-6440-8 — NUT,PLAIN,CLINCH

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

SOS-6440-8: NUT,PLAIN,CLINCH.

The NUT,PLAIN,CLINCH is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: CLINCH, nut_height: 0.250 INCHES NOMINAL IN, pilot_diameter: 0.212 INCHES NOMINAL IN, width_across_flats: 0.250 INCHES NOMINAL IN, nominal_thread_size: 0.112 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-554-8889, 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
SOS-6440-8
NSN: 5310-01-554-8889
FSC: 5310 — Nuts and Washers
CAGE: 46384 — PENN ENGINEERING & MANUFACTURING CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleCLINCH
nut_height0.250 INCHES NOMINAL IN
pilot_diameter0.212 INCHES NOMINAL IN
width_across_flats0.250 INCHES NOMINAL IN
nominal_thread_size0.112 INCHES IN
drilled_hole_diameter0.213 INCHES NOMINAL IN
thread_quantity_per_inch40.0
part_name_assigned_by_controlling_agencyTHRU-HOLE THREADED STANDOFFS
NSN5310-01-554-8889
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SOS-6440-8 · 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
•
WIDTH ACROSS FLATS: 0.250 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.112 INCHES IN
•
PILOT DIAMETER: 0.212 INCHES NOMINAL IN
•
NUT HEIGHT: 0.250 INCHES NOMINAL IN
•
DRILLED HOLE DIAMETER: 0.213 INCHES NOMINAL IN
•
NUT STYLE: CLINCH
•
THREAD QUANTITY PER INCH: 40.0
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.250 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.112 INCHES IN
PILOT DIAMETER0.212 INCHES NOMINAL IN
NUT HEIGHT0.250 INCHES NOMINAL IN
DRILLED HOLE DIAMETER0.213 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYTHRU-HOLE THREADED STANDOFFS
NUT STYLECLINCH
THREAD QUANTITY PER INCH40.0
MATERIALSTEEL OVERALL
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

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 SOS-6440-8?
SOS-6440-8 is a NUT,PLAIN,CLINCH.
What is the NSN for SOS-6440-8?
SOS-6440-8 is cataloged in the U.S. Government catalog under NSN 5310-01-554-8889. 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.