PartsTable
Technical Data Sheet
Download PDF

90298A634 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

90298A634: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL PROPERTY CLASS 18.8 OVERALL, head_style: KNURLED NO. 1, head_height: 0.250 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.5625 INCHES NOMINAL IN, thread_length: 0.500 INCHES NOMINAL IN.

This part is cataloged in the U.S. Government catalog under NSN 5305-01-629-5552, 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
90298A634
NSN: 5305-01-629-5552
FSC: 5305 — Screws
CAGE: 2V507 — MCMASTER-CARR SUPPLY COMPANY (USA)
SPECIFICATIONS
materialSTEEL PROPERTY CLASS 18.8 OVERALL
head_styleKNURLED NO. 1
head_height0.250 INCHES NOMINAL IN
thread_class3A A
head_diameter0.5625 INCHES NOMINAL IN
thread_length0.500 INCHES NOMINAL IN
shoulder_shapeROUND ALL SHOULDERS
fastener_length3.00 INCHES NOMINAL IN
shoulder_length2.495 INCHES MINIMUM AND 2.505 INCHES MAXIMUM ALL SHOULDERS IN
thread_directionRIGHT-HAND
shoulder_diameter0.371 INCHES MINIMUM AND 0.375 INCHES MAXIMUM ALL SHOULDERS IN
width_across_flats0.1875 INCHES NOMINAL IN
NSN5305-01-629-5552
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 90298A634 · 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
•
WIDTH ACROSS FLATS: 0.1875 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.250 INCHES NOMINAL IN
•
FASTENER LENGTH: 3.00 INCHES NOMINAL IN
•
SHOULDER LENGTH: 2.495 INCHES MINIMUM AND 2.505 INCHES MAXIMUM ALL SHOULDERS IN
•
SHOULDER DIAMETER: 0.371 INCHES MINIMUM AND 0.375 INCHES MAXIMUM ALL SHOULDERS IN
•
THREAD LENGTH: 0.500 INCHES NOMINAL IN
•
SHOULDER SHAPE: ROUND ALL SHOULDERS
•
NOMINAL THREAD DIAMETER: 0.3125 INCHES IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.1875 INCHES NOMINAL IN
HEAD HEIGHT0.250 INCHES NOMINAL IN
FASTENER LENGTH3.00 INCHES NOMINAL IN
SHOULDER LENGTH2.495 INCHES MINIMUM AND 2.505 INCHES MAXIMUM ALL SHOULDERS IN
SHOULDER DIAMETER0.371 INCHES MINIMUM AND 0.375 INCHES MAXIMUM ALL SHOULDERS IN
THREAD LENGTH0.500 INCHES NOMINAL IN
SHOULDER SHAPEROUND ALL SHOULDERS
NOMINAL THREAD DIAMETER0.3125 INCHES IN
HEAD STYLEKNURLED NO. 1
THREAD DIRECTIONRIGHT-HAND
SUBSTITUTES & CROSS-REFERENCES 1
73136Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 90298A634?
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 90298A634?
90298A634 is a SCREW,SHOULDER.
What parts can replace 90298A634?
There is 1 known substitute for 90298A634: 73136. Substitute compatibility should be verified for your specific system.
What is the NSN for 90298A634?
90298A634 is cataloged in the U.S. Government catalog under NSN 5305-01-629-5552. 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 — 90298A634

✓ 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.