91771A999 — SCREW,MACHINE

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

91771A999: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK UNDERCUT, thread_class: 2A A, thread_length: 1.000 INCHES NOMINAL IN, screw_material: STEEL CORROSION RESISTING, fastener_length: 1.000 INCHES NOMINAL IN, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-559-9568, 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

91771A999

NSN: 5305-01-559-9568
FSC: 5305 — Screws
CAGE: 2V507 — MCMASTER-CARR SUPPLY COMPANY (USA)

SPECIFICATIONS

head_style	FLAT COUNTERSUNK UNDERCUT
thread_class	2A A
thread_length	1.000 INCHES NOMINAL IN
screw_material	STEEL CORROSION RESISTING
fastener_length	1.000 INCHES NOMINAL IN
thread_direction	RIGHT-HAND
countersink_angle	82.0 DEGREES NOMINAL
internal_drive_style	CROSS RECESS TYPE II
nominal_thread_diameter	0.164 INCHES IN
thread_quantity_per_inch	32
thread_series_designator	UNIFIED NATIONAL COARSE (UNC)
NSN	5305-01-559-9568

COMPONENT DIAGRAM

KEY FEATURES

•

FASTENER LENGTH: 1.000 INCHES NOMINAL IN

•

THREAD LENGTH: 1.000 INCHES NOMINAL IN

•

NOMINAL THREAD DIAMETER: 0.164 INCHES IN

•

HEAD STYLE: FLAT COUNTERSUNK UNDERCUT

•

THREAD DIRECTION: RIGHT-HAND

•

SCREW MATERIAL: STEEL CORROSION RESISTING

•

INTERNAL DRIVE STYLE: CROSS RECESS TYPE II

•

COUNTERSINK ANGLE: 82.0 DEGREES NOMINAL

TECHNICAL CHARACTERISTICS

FASTENER LENGTH	1.000 INCHES NOMINAL IN
THREAD LENGTH	1.000 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER	0.164 INCHES IN
HEAD STYLE	FLAT COUNTERSUNK UNDERCUT
THREAD DIRECTION	RIGHT-HAND
SCREW MATERIAL	STEEL CORROSION RESISTING
INTERNAL DRIVE STYLE	CROSS RECESS TYPE II
COUNTERSINK ANGLE	82.0 DEGREES NOMINAL
THREAD CLASS	2A A
THREAD QUANTITY PER INCH	32

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

91771A999-10-32X4.25Reference 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 91771A999?

91771A999 is a SCREW,MACHINE.

What parts can replace 91771A999?

There is 1 known substitute for 91771A999: 91771A999-10-32X4.25. Substitute compatibility should be verified for your specific system.

What is the NSN for 91771A999?

91771A999 is cataloged in the U.S. Government catalog under NSN 5305-01-559-9568. This indicates validated use in U.S. government and defense supply chains.

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