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MS90728-91L — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MS90728-91L: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL FASTENER, head_style: HEXAGON, head_height: 0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.126 INCHES MINIMUM AND 1.314 INCHES MAXIMUM IN, fastener_length: 1.938 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-198-4665, 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
MS90728-91L
NSN: 5306-01-198-4665
FSC: 5306 — Bolts
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL FASTENER
head_styleHEXAGON
head_height0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
thread_class2A A
thread_length1.126 INCHES MINIMUM AND 1.314 INCHES MAXIMUM IN
fastener_length1.938 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM FASTENER
locking_featurePATCH OR STRIP THREADS
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentZINC AND CHROMATE FASTENER
width_between_flats0.612 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
NSN5306-01-198-4665
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS90728-91L · 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: 0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.938 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633 TY 2 SC 3 ASSN STD SINGLE TREATMENT RESPONSE FASTENER
•
THREAD LENGTH: 1.126 INCHES MINIMUM AND 1.314 INCHES MAXIMUM IN
•
HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM FASTENER
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE J429,GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A354,GRADE BD ASSN STD SINGLE MATERIAL RESPONSE FASTENER
•
NOMINAL THREAD DIAMETER: 0.438 INCHES IN
•
FEATURES PROVIDED: FINISHED HEAD
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
FASTENER LENGTH1.938 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633 TY 2 SC 3 ASSN STD SINGLE TREATMENT RESPONSE FASTENER
THREAD LENGTH1.126 INCHES MINIMUM AND 1.314 INCHES MAXIMUM IN
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM FASTENER
MATERIAL DOCUMENT AND CLASSIFICATIONSAE J429,GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A354,GRADE BD ASSN STD SINGLE MATERIAL RESPONSE FASTENER
NOMINAL THREAD DIAMETER0.438 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
SUBSTITUTES & CROSS-REFERENCES 2
ASME B18.2.1Reference document
Same NSN cross-reference
Reference document — Secondary reference
B1821BH044C200LReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS90728-91L?
MS90728-91L is a BOLT,MACHINE.
What parts can replace MS90728-91L?
There are 2 known substitutes for MS90728-91L: ASME B18.2.1, B1821BH044C200L. Substitute compatibility should be verified for your specific system.
What is the NSN for MS90728-91L?
MS90728-91L is cataloged in the U.S. Government catalog under NSN 5306-01-198-4665. This indicates validated use in U.S. government and defense supply chains.
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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.