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724-990128-657 — SCREW,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

724-990128-657: SCREW,EXTERNALLY RELIEVED BODY.

The SCREW,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OR STEEL COMP 303SE OVERALL, head_style: OVAL COUNTERSUNK, thread_class: 2A A, head_diameter: 0.244 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN, thread_length: 0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN, fastener_length: 0.875 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-159-5715, 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
724-990128-657
NSN: 5305-01-159-5715
FSC: 5305 — Screws
CAGE: 06540 — NEW HAVEN MFG CORP AMATOM ELECTRONIC HARDWARE DIV (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OR STEEL COMP 303SE OVERALL
head_styleOVAL COUNTERSUNK
thread_class2A A
head_diameter0.244 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN
thread_length0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
fastener_length0.875 INCHES NOMINAL IN
thread_directionRIGHT-HAND
countersink_angle81.0 DEGREES MINIMUM AND 83.0 DEGREES MAXIMUM
surface_treatmentPASSIVATE OVERALL
internal_drive_styleSLOT
nominal_thread_diameter0.138 INCHES IN
first_diameter_from_head0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
NSN5305-01-159-5715
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 724-990128-657 · 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: 0.875 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A581 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
FIRST DIAMETER FROM HEAD: 0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
•
HEAD STYLE: OVAL COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
FASTENER LENGTH0.875 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A581 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FIRST DIAMETER FROM HEAD0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.138 INCHES IN
HEAD STYLEOVAL COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.542 INCHES NOMINAL IN
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY1
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 2
6218-SS-0632Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
6218-SS-0632-7Reference 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 724-990128-657?
724-990128-657 is a SCREW,EXTERNALLY RELIEVED BODY.
What parts can replace 724-990128-657?
There are 2 known substitutes for 724-990128-657: 6218-SS-0632, 6218-SS-0632-7. Substitute compatibility should be verified for your specific system.
What is the NSN for 724-990128-657?
724-990128-657 is cataloged in the U.S. Government catalog under NSN 5305-01-159-5715. 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.