PartsTable
Technical Data Sheet
Download PDF

91771A546 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91771A546: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK, head_diameter: 0.477 INCHES NOMINAL IN, screw_material: STEEL, fastener_length: 1.500 INCHES NOMINAL IN, special_features: HEAD HEIGHT .153; 1/4"-20 THREAD, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-545-8232, 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
91771A546
NSN: 5305-01-545-8232
FSC: 5305 — Screws
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
head_diameter0.477 INCHES NOMINAL IN
screw_materialSTEEL
fastener_length1.500 INCHES NOMINAL IN
special_featuresHEAD HEIGHT .153; 1/4"-20 THREAD
thread_directionRIGHT-HAND
countersink_angle82.0 RADIANS NOMINAL
end_item_identificationNSN: 1940-01-526-0770
part_name_assigned_by_controlling_agency18-8 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW
NSN5305-01-545-8232
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91771A546 · 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: 1.500 INCHES NOMINAL IN
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL
•
COUNTERSINK ANGLE: 82.0 RADIANS NOMINAL
TECHNICAL CHARACTERISTICS
FASTENER LENGTH1.500 INCHES NOMINAL IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL
SPECIAL FEATURESHEAD HEIGHT .153; 1/4"-20 THREAD
COUNTERSINK ANGLE82.0 RADIANS NOMINAL
PART NAME ASSIGNED BY CONTROLLING AGENCY18-8 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW
END ITEM IDENTIFICATIONNSN: 1940-01-526-0770
HEAD DIAMETER0.477 INCHES NOMINAL IN
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: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy 91771A546?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 91771A546?
91771A546 is a SCREW,MACHINE.
What is the NSN for 91771A546?
91771A546 is cataloged in the U.S. Government catalog under NSN 5305-01-545-8232. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 91771A546

✓ 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.