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91309A541 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91309A541: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_height: 0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.850 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN, special_features: ZINC PLATED, thread_direction: RIGHT-HAND, width_between_flats: 0.880 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-471-1725, 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
91309A541
NSN: 5305-01-471-1725
FSC: 5305 — Screws
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
head_height0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
thread_class2A A
thread_length0.850 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
special_featuresZINC PLATED
thread_directionRIGHT-HAND
width_between_flats0.880 INCHES NOMINAL IN
end_item_identification6115014594514
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch20
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-471-1725
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91309A541 · 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: 0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.850 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.880 INCHES NOMINAL IN
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
THREAD LENGTH0.850 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.880 INCHES NOMINAL IN
SPECIAL FEATURESZINC PLATED
THREAD CLASS2A A
END ITEM IDENTIFICATION6115014594514
THREAD QUANTITY PER INCH20
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
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 91309A541?
91309A541 is a SCREW,MACHINE.
What is the NSN for 91309A541?
91309A541 is cataloged in the U.S. Government catalog under NSN 5305-01-471-1725. 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.