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91478A638 — SCREW,LAG

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91478A638: SCREW,LAG.

The SCREW,LAG is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, fastener_length: 3.500 INCHES NOMINAL IN, surface_treatment: ZINC OVERALL, end_item_identification: 4940-01-445-0086, nonmachine_thread_style: GIMLET POINT (TYPE A, AB OR BA). This part is cataloged in the U.S.

Government catalog under NSN 5305-01-499-2858, 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
91478A638
NSN: 5305-01-499-2858
FSC: 5305 — Screws
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
fastener_length3.500 INCHES NOMINAL IN
special_featuresCAGE 05047 AMERICAN SOCIETY OF MECHANICAL ENGINEERS, 2 PARK AVE FL 6 NEW YORK NY 10016-5611; PH. 800-843-2763: CAGE IS A SPECIFICATION AND HOLDS THE DESIGN CONTROL.
surface_treatmentZINC OVERALL
end_item_identification4940-01-445-0086
nonmachine_thread_styleGIMLET POINT (TYPE A, AB OR BA)
nonmachine_nominal_thread_diameter0.375 INCHES IN
NSN5305-01-499-2858
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91478A638 · 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
•
NONMACHINE NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
FASTENER LENGTH: 3.500 INCHES NOMINAL IN
•
NONMACHINE THREAD STYLE: GIMLET POINT (TYPE A, AB OR BA)
•
HEAD STYLE: HEXAGON
•
SURFACE TREATMENT: ZINC OVERALL
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
NONMACHINE NOMINAL THREAD DIAMETER0.375 INCHES IN
FASTENER LENGTH3.500 INCHES NOMINAL IN
NONMACHINE THREAD STYLEGIMLET POINT (TYPE A, AB OR BA)
HEAD STYLEHEXAGON
SPECIAL FEATURESCAGE 05047 AMERICAN SOCIETY OF MECHANICAL ENGINEERS, 2 PARK AVE FL 6 NEW YORK NY 10016-5611; PH. 800-843-2763: CAGE IS A SPECIFICATION AND HOLDS THE DESIGN CONTROL.
SURFACE TREATMENTZINC OVERALL
END ITEM IDENTIFICATION4940-01-445-0086
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
22267Same 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
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FREQUENTLY ASKED QUESTIONS
What is 91478A638?
91478A638 is a SCREW,LAG.
What parts can replace 91478A638?
There is 1 known substitute for 91478A638: 22267. Substitute compatibility should be verified for your specific system.
What is the NSN for 91478A638?
91478A638 is cataloged in the U.S. Government catalog under NSN 5305-01-499-2858. This indicates validated use in U.S. government and defense supply chains.
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