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ST3M753L4H21 — ST3M753L4H21

✓ Government record, cited
THE BOEING COMPANY DIV DEFENSE · BOLT SCREW
PRODUCT OVERVIEW

ST3M753L4H21: ST3M753L4H21.

The ST3M753L4H21 is a THE BOEING COMPANY DIV DEFENSE industrial component. This part is cataloged in the U.S. Government catalog under NSN 5306-01-453-3603, 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
ST3M753L4H21
NSN: 5306-01-453-3603
FSC: 5306 — Bolts
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
Part NumberST3M753L4H21
ManufacturerTHE BOEING COMPANY DIV DEFENSE
NSN5306-01-453-3603
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST3M753L4H21 · THE BOEING COMPANY DIV DEFENSE ⚠ 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: 0.036 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.250 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.780 INCHES MAXIMUM IN
•
EXTENDED WASHER DIAMETER: 0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.468 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: SPLINE EXTENDED WASHER
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.036 INCHES NOMINAL IN
HEAD HEIGHT0.250 INCHES NOMINAL IN
FASTENER LENGTH1.780 INCHES MAXIMUM IN
EXTENDED WASHER DIAMETER0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
THREAD LENGTH0.468 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLESPLINE EXTENDED WASHER
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH1.312 INCHES NOMINAL IN
HEAD MINOR DIAMETER0.297 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
11829L4H21Same 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 ST3M753L4H21?
ST3M753L4H21 is a ST3M753L4H21 manufactured by THE BOEING COMPANY DIV DEFENSE.
What parts can replace ST3M753L4H21?
There is 1 known substitute for ST3M753L4H21: 11829L4H21. Substitute compatibility should be verified for your specific system.
What is the NSN for ST3M753L4H21?
ST3M753L4H21 is cataloged in the U.S. Government catalog under NSN 5306-01-453-3603. This indicates validated use in U.S. government and defense supply chains.
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