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313721-6 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

313721-6: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: PAN NO. 2, thread_class: 2A A, head_diameter: 1.250 INCHES NOMINAL IN, thread_length: 1.250 INCHES NOMINAL IN, screw_material: STEEL CORROSION RESISTING, fastener_length: 1.625 INCHES NOMINAL IN.

This part is cataloged in the U.S. Government catalog under NSN 5305-01-090-6314, 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
313721-6
NSN: 5305-01-090-6314
FSC: 5305 — Screws
CAGE: 22915 — NORTHROP GRUMMAN CORP ELECTRONIC SYSTEMS DEFENSIVE SYSTEM DIV (USA)
SPECIFICATIONS
head_stylePAN NO. 2
thread_class2A A
head_diameter1.250 INCHES NOMINAL IN
thread_length1.250 INCHES NOMINAL IN
screw_materialSTEEL CORROSION RESISTING
fastener_length1.625 INCHES NOMINAL IN
nominal_thread_diameter0.750 INCHES IN
screw_surface_treatmentPASSIVATE
thread_quantity_per_inch16
thread_series_designatorUNF
screw_material_document_and_classificationQQ-S-764 TY 303 COND A FED SPEC SINGLE MATERIAL RESPONSE
NSN5305-01-090-6314
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 313721-6 · 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
•
SCREW SURFACE TREATMENT: PASSIVATE
•
FASTENER LENGTH: 1.625 INCHES NOMINAL IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764 TY 303 COND A FED SPEC SINGLE MATERIAL RESPONSE
•
THREAD LENGTH: 1.250 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
HEAD STYLE: PAN NO. 2
•
SCREW MATERIAL: STEEL CORROSION RESISTING
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS
SCREW SURFACE TREATMENTPASSIVATE
FASTENER LENGTH1.625 INCHES NOMINAL IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764 TY 303 COND A FED SPEC SINGLE MATERIAL RESPONSE
THREAD LENGTH1.250 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLEPAN NO. 2
SCREW MATERIALSTEEL CORROSION RESISTING
THREAD CLASS2A A
THREAD QUANTITY PER INCH16
THREAD SERIES DESIGNATORUNF
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 313721-6?
313721-6 is a SCREW,MACHINE.
What is the NSN for 313721-6?
313721-6 is cataloged in the U.S. Government catalog under NSN 5305-01-090-6314. 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.