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ST3M753 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST3M753: BOLT,CLOSE TOLERANCE.

The BOLT,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: SPLINE EXTENDED WASHER, grip_length: 2.1875 INCHES NOMINAL IN, head_height: 0.312 INCHES NOMINAL IN, point_style: FLAT, point_length: 0.05 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-475-0638, 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
ST3M753
NSN: 5306-01-475-0638
NIINs: 014750638, 017053643, 017053645
FSC: 5306 — Bolts
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleSPLINE EXTENDED WASHER
grip_length2.1875 INCHES NOMINAL IN
head_height0.312 INCHES NOMINAL IN
point_styleFLAT
point_length0.05 INCHES NOMINAL IN
thread_class3A A
grip_diameter0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN
thread_length0.551 INCHES NOMINAL IN
fastener_length2.7385 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
NSN5306-01-475-0638
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST3M753 · 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
•
EXTENDED WASHER THICKNESS: 0.045 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.312 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.676 INCHES NOMINAL IN
•
EXTENDED WASHER DIAMETER: 0.580 INCHES NOMINAL IN
•
THREAD LENGTH: 0.551 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.3125 INCHES IN
•
HEAD STYLE: SPLINE EXTENDED WASHER
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.045 INCHES NOMINAL IN
HEAD HEIGHT0.312 INCHES NOMINAL IN
FASTENER LENGTH1.676 INCHES NOMINAL IN
EXTENDED WASHER DIAMETER0.580 INCHES NOMINAL IN
THREAD LENGTH0.551 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.3125 INCHES IN
HEAD STYLESPLINE EXTENDED WASHER
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH1.125 INCHES NOMINAL IN
HEAD MINOR DIAMETER0.375 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 7
HP7753-5-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
GS1032-5-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
AIC763-5-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
ST3M753-5-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
122897-5-18Reference document
Same NSN cross-reference
Reference document — Secondary reference
11829-5-15Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST3M753?
ST3M753 is a BOLT,CLOSE TOLERANCE.
What parts can replace ST3M753?
There are 7 known substitutes for ST3M753: HP7753-5-18, GS1032-5-18, AIC763-5-18 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST3M753?
ST3M753 is cataloged in the U.S. Government catalog under NSN 5306-01-475-0638. 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.