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P04391 — SCREW,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

P04391: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 316 OVERALL, head_style: FLAT CHAMFER, grip_length: 0.500 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN, head_height: 0.188 INCHES NOMINAL IN, thread_class: 2A A, grip_diameter: 0.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-580-0802, 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
P04391
NSN: 5305-01-580-0802
FSC: 5305 — Screws
CAGE: 0YJB5 — GENERAL ATOMICS AERONAUTICAL SYSTEMS, INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 316 OVERALL
head_styleFLAT CHAMFER
grip_length0.500 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
head_height0.188 INCHES NOMINAL IN
thread_class2A A
grip_diameter0.250 INCHES NOMINAL IN
head_diameter0.375 INCHES NOMINAL IN
thread_length0.250 INCHES NOMINAL IN
fastener_length0.750 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
hardness_rating55.0 ROCKWELL B NOMINAL OVERALL
thread_directionRIGHT-HAND
internal_drive_styleFOUR SPANNER
NSN5305-01-580-0802
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: P04391 · 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
•
HEAD HEIGHT: 0.188 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.750 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.250 INCHES NOMINAL IN
•
HARDNESS RATING: 55.0 ROCKWELL B NOMINAL OVERALL
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HAND
•
GRIP LENGTH: 0.500 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.188 INCHES NOMINAL IN
FASTENER LENGTH0.750 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
THREAD LENGTH0.250 INCHES NOMINAL IN
HARDNESS RATING55.0 ROCKWELL B NOMINAL OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH0.500 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
GRIP DIAMETER0.250 INCHES NOMINAL IN
MINIMUM TENSILE STRENGTH70000 POUNDS PER SQUARE INCH LBS
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 1
91829A537Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is P04391?
P04391 is a SCREW,CLOSE TOLERANCE.
What parts can replace P04391?
There is 1 known substitute for P04391: 91829A537. Substitute compatibility should be verified for your specific system.
What is the NSN for P04391?
P04391 is cataloged in the U.S. Government catalog under NSN 5305-01-580-0802. 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.