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P38263 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

P38263: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include thread_class: 3A A, screw_material: STEEL, fastener_length: 1.438 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, nominal_thread_diameter: 0.507 INCHES IN, thread_series_designator: UNIFIED NATIONAL JOINT FINE (UNJF). This part is cataloged in the U.S.

Government catalog under NSN 5305-01-538-7964, 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
P38263
NSN: 5305-01-538-7964
FSC: 5305 — Screws
CAGE: U1604 — MARTIN-BAKER AIRCRAFT COMPANY LIMITED (GBR)
SPECIFICATIONS
thread_class3A A
screw_materialSTEEL
fastener_length1.438 INCHES NOMINAL IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.507 INCHES IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF)
part_name_assigned_by_controlling_agencyBOLT,100" FLUSH HEAD SELF LOCKING OPTIONAL
screw_material_document_and_classificationMS14191 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5305-01-538-7964
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: P38263 · 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: 1.438 INCHES NOMINAL IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: MS14191 MIL SPEC SINGLE MATERIAL RESPONSE
•
NOMINAL THREAD DIAMETER: 0.507 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL
•
THREAD CLASS: 3A A
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF)
TECHNICAL CHARACTERISTICS
FASTENER LENGTH1.438 INCHES NOMINAL IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONMS14191 MIL SPEC SINGLE MATERIAL RESPONSE
NOMINAL THREAD DIAMETER0.507 INCHES IN
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL
PART NAME ASSIGNED BY CONTROLLING AGENCYBOLT,100" FLUSH HEAD SELF LOCKING OPTIONAL
THREAD CLASS3A A
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF)
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
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 P38263?
P38263 is a SCREW,MACHINE.
What is the NSN for P38263?
P38263 is cataloged in the U.S. Government catalog under NSN 5305-01-538-7964. 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.