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91858A542 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91858A542: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK UNDERCUT, head_height: 0.140 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.462 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN, thread_length: 0.829 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN, screw_material: STEEL CORROSION RESISTING. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-469-5486, 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
91858A542
NSN: 5305-01-469-5486
FSC: 5305 — Screws
CAGE: 3A054 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK UNDERCUT
head_height0.140 INCHES NOMINAL IN
thread_class2A A
head_diameter0.462 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
thread_length0.829 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN
screw_materialSTEEL CORROSION RESISTING
fastener_length0.969 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN
special_featuresSLOT DEPTH .046 MINIMUM AND .070 MAXIMUM
thread_directionRIGHT-HAND
countersink_angle80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
internal_drive_styleSLOT
end_item_identification61150B697465
NSN5305-01-469-5486
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91858A542 · 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: 0.140 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.969 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR ASTMA276 ASSN STD 2ND MATERIAL RESPONSE
•
THREAD LENGTH: 0.829 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK UNDERCUT
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL CORROSION RESISTING
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.140 INCHES NOMINAL IN
FASTENER LENGTH0.969 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR ASTMA276 ASSN STD 2ND MATERIAL RESPONSE
THREAD LENGTH0.829 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEFLAT COUNTERSUNK UNDERCUT
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL CORROSION RESISTING
SPECIAL FEATURESSLOT DEPTH .046 MINIMUM AND .070 MAXIMUM
INTERNAL DRIVE STYLESLOT
SUBSTITUTES & CROSS-REFERENCES 2
202343Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
202343-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 91858A542?
91858A542 is a SCREW,MACHINE.
What parts can replace 91858A542?
There are 2 known substitutes for 91858A542: 202343, 202343-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 91858A542?
91858A542 is cataloged in the U.S. Government catalog under NSN 5305-01-469-5486. 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.