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3920338C1 — BOLT,SQUARE NECK

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3920338C1: BOLT,SQUARE NECK.

The BOLT,SQUARE NECK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, thread_class: 2A A, head_diameter: 0.47 INCHES NOMINAL IN, fastener_length: 0.50 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, end_item_identification: MRAP NAVISTAR DXM AMBULANCE. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-600-6859, 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
3920338C1
NSN: 5306-01-600-6859
FSC: 5306 — Bolts
CAGE: 338X5 — ND DEFENSE LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
thread_class2A A
head_diameter0.47 INCHES NOMINAL IN
fastener_length0.50 INCHES NOMINAL IN
thread_directionRIGHT-HAND
end_item_identificationMRAP NAVISTAR DXM AMBULANCE
thread_quantity_per_inch32
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
bottom_countersink_diameter0.19 INCHES NOMINAL IN
NSN5306-01-600-6859
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3920338C1 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FASTENER LENGTH: 0.50 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
BOTTOM COUNTERSINK DIAMETER: 0.19 INCHES NOMINAL IN
•
THREAD CLASS: 2A A
•
THREAD QUANTITY PER INCH: 32
•
MATERIAL: STEEL COMP 304 OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS
FASTENER LENGTH0.50 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
BOTTOM COUNTERSINK DIAMETER0.19 INCHES NOMINAL IN
THREAD CLASS2A A
END ITEM IDENTIFICATIONMRAP NAVISTAR DXM AMBULANCE
THREAD QUANTITY PER INCH32
MATERIALSTEEL COMP 304 OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
HEAD DIAMETER0.47 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
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 3920338C1?
3920338C1 is a BOLT,SQUARE NECK.
What is the NSN for 3920338C1?
3920338C1 is cataloged in the U.S. Government catalog under NSN 5306-01-600-6859. 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.