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Technical Data Sheet
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91603A420 — BOLT,HOOK

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91603A420: BOLT,HOOK.

The BOLT,HOOK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 2A A, thread_length: 4.000 INCHES MINIMUM AND 5.000 INCHES MAXIMUM IN, shank_diameter: 1.000 INCHES NOMINAL IN, special_features: RIGHT 90 DEGREE ANGLE, style_designator: RIGHT ANGLE BEND. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-619-7985, 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
91603A420
NSN: 5306-01-619-7985
FSC: 5306 — Bolts
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class2A A
thread_length4.000 INCHES MINIMUM AND 5.000 INCHES MAXIMUM IN
shank_diameter1.000 INCHES NOMINAL IN
special_featuresRIGHT 90 DEGREE ANGLE
style_designatorRIGHT ANGLE BEND
thread_directionRIGHT-HAND
hook_inside_width3.500 INCHES NOMINAL IN
surface_treatmentZINC OVERALL
nominal_thread_diameter1.000 INCHES IN
minimum_tensile_strength58000 POUNDS PER SQUARE INCH LBS
thread_quantity_per_inch8
NSN5306-01-619-7985
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91603A420 · 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
•
SHANK DIAMETER: 1.000 INCHES NOMINAL IN
•
EXTERNAL THREAD TOLERANCE CLASS: 2A A
•
DISTANCE FROM INSIDE OF BEND TO SHANK END: 14.000 INCHES NOMINAL IN
•
THREAD LENGTH: 4.000 INCHES MINIMUM AND 5.000 INCHES MAXIMUM IN
•
HOOK INSIDE WIDTH: 3.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: RIGHT ANGLE BEND
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A36 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 1.000 INCHES IN
TECHNICAL CHARACTERISTICS
SHANK DIAMETER1.000 INCHES NOMINAL IN
EXTERNAL THREAD TOLERANCE CLASS2A A
DISTANCE FROM INSIDE OF BEND TO SHANK END14.000 INCHES NOMINAL IN
THREAD LENGTH4.000 INCHES MINIMUM AND 5.000 INCHES MAXIMUM IN
HOOK INSIDE WIDTH3.500 INCHES NOMINAL IN
STYLE DESIGNATORRIGHT ANGLE BEND
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A36 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER1.000 INCHES IN
THREAD DIRECTIONRIGHT-HAND
SPECIAL FEATURESRIGHT 90 DEGREE ANGLE
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91603A420?
91603A420 is a BOLT,HOOK.
What is the NSN for 91603A420?
91603A420 is cataloged in the U.S. Government catalog under NSN 5306-01-619-7985. This indicates validated use in U.S. government and defense supply chains.
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