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803-5959303-X-91 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

803-5959303-X-91: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.685 INCHES MINIMUM AND 0.762 INCHES MAXIMUM IN, thread_length: 0.875 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN, screw_material: TITANIUM ALLOY UNS R56400, fastener_length: 1.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-334-2895, 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
803-5959303-X-91
NSN: 5305-01-334-2895
FSC: 5305 — Screws
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
thread_class3A A
head_diameter0.685 INCHES MINIMUM AND 0.762 INCHES MAXIMUM IN
thread_length0.875 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
screw_materialTITANIUM ALLOY UNS R56400
fastener_length1.000 INCHES NOMINAL IN
locking_featurePATCH OR PELLET OR STRIP
thread_directionRIGHT-HAND
countersink_angle80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
internal_drive_styleSLOT
nominal_thread_diameter0.375 INCHES IN
locking_feature_materialPLASTIC POLYAMIDE NYLON
NSN5305-01-334-2895
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 803-5959303-X-91 · 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: 1.000 INCHES NOMINAL IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B348,GR 5 ASSN STD SINGLE MATERIAL RESPONSE
•
THREAD LENGTH: 0.875 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
•
LOCKING FEATURE MATERIAL: PLASTIC POLYAMIDE NYLON
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
•
LOCKING FEATURE: PATCH OR PELLET OR STRIP
TECHNICAL CHARACTERISTICS
FASTENER LENGTH1.000 INCHES NOMINAL IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONASTM B348,GR 5 ASSN STD SINGLE MATERIAL RESPONSE
THREAD LENGTH0.875 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
LOCKING FEATURE MATERIALPLASTIC POLYAMIDE NYLON
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
LOCKING FEATUREPATCH OR PELLET OR STRIP
SCREW MATERIALTITANIUM ALLOY UNS R56400
INTERNAL DRIVE STYLESLOT
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 2
524-6603688-VHBA-102Reference document
Same NSN cross-reference
Reference document — Secondary reference
5959303-91Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 803-5959303-X-91?
803-5959303-X-91 is a SCREW,MACHINE.
What parts can replace 803-5959303-X-91?
There are 2 known substitutes for 803-5959303-X-91: 524-6603688-VHBA-102, 5959303-91. Substitute compatibility should be verified for your specific system.
What is the NSN for 803-5959303-X-91?
803-5959303-X-91 is cataloged in the U.S. Government catalog under NSN 5305-01-334-2895. 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.