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91771A561 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91771A561: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: DEE, screw_material: STEEL CORROSION RESISTING, fastener_length: 1.000 INCHES NOMINAL IN, special_features: NEXT HIGHER ASSEMBLY HYDRAULIC PUMP TEST RIG, thread_direction: RIGHT-HAND, internal_drive_style: CROSS RECESS TYPE II. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-543-0484, 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
91771A561
NSN: 5305-01-543-0484
FSC: 5305 — Screws
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
head_styleDEE
screw_materialSTEEL CORROSION RESISTING
fastener_length1.000 INCHES NOMINAL IN
special_featuresNEXT HIGHER ASSEMBLY HYDRAULIC PUMP TEST RIG
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE II
end_item_identificationEUROFIGHTER
part_name_assigned_by_controlling_agencyNONSTICK-COATED FLAT HEAD PHILLIPS
NSN5305-01-543-0484
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91771A561 · 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
•
HEAD STYLE: DEE
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL CORROSION RESISTING
•
COLOR: GRAY/GREY
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE II
TECHNICAL CHARACTERISTICS
FASTENER LENGTH1.000 INCHES NOMINAL IN
HEAD STYLEDEE
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL CORROSION RESISTING
COLORGRAY/GREY
SPECIAL FEATURESNEXT HIGHER ASSEMBLY HYDRAULIC PUMP TEST RIG
INTERNAL DRIVE STYLECROSS RECESS TYPE II
PART NAME ASSIGNED BY CONTROLLING AGENCYNONSTICK-COATED FLAT HEAD PHILLIPS
END ITEM IDENTIFICATIONEUROFIGHTER
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
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FREQUENTLY ASKED QUESTIONS
What is 91771A561?
91771A561 is a SCREW,MACHINE.
What is the NSN for 91771A561?
91771A561 is cataloged in the U.S. Government catalog under NSN 5305-01-543-0484. 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.