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Technical Data Sheet

1A4757 — Technical Data Sheet

✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 2330 OVERALL, head_style: HEXAGON, head_height: 0.562 INCHES NOMINAL IN, thread_length: 0.938 INCHES MINIMUM IN, fastener_length: 1.750 INCHES NOMINAL IN, hardness_rating: 24.2 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL. This part is cataloged in the Federal Logistics Information System under NSN 5306-00-263-8961, 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
1A4757
NSN: 5306-00-263-8961
FSC: 5306
CAGE: 95201 — NAPCO INTERNATIONAL LLC DBA NAPCO INTERNATIONAL INC (USA)
SPECIFICATIONS
materialSTEEL COMP 2330 OVERALL
head_styleHEXAGON
head_height0.562 INCHES NOMINAL IN
thread_length0.938 INCHES MINIMUM IN
fastener_length1.750 INCHES NOMINAL IN
hardness_rating24.2 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
width_between_flats0.610 INCHES MINIMUM AND 0.631 INCHES MAXIMUM IN
nominal_thread_diameter0.438 INCHES IN
thread_quantity_per_inch20
thread_series_designatorUNF
NSN5306-00-263-8961
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1A4757 · 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
•
THREAD QUANTITY PER INCH: 20
•
HEAD HEIGHT: 0.562 INCHES NOMINAL IN
•
NONSTANDARD THREAD PITCH DIAMETER: +0.4010 TO 0.4060 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SERIES DESIGNATOR: UNF
•
MINIMUM YIELD STRENGTH: 105000 POUNDS PER SQUARE INCH LBS
•
HARDNESS RATING: 24.2 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL: STEEL COMP 2330 OVERALL
TECHNICAL CHARACTERISTICS
THREAD QUANTITY PER INCH20
HEAD HEIGHT0.562 INCHES NOMINAL IN
NONSTANDARD THREAD PITCH DIAMETER+0.4010 TO 0.4060 INCHES IN
THREAD DIRECTIONRIGHT-HAND
THREAD SERIES DESIGNATORUNF
MINIMUM YIELD STRENGTH105000 POUNDS PER SQUARE INCH LBS
HARDNESS RATING24.2 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
MATERIALSTEEL COMP 2330 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FEATURES PROVIDEDFINISHED HEAD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
1601Upgraded SuccessorGOVERNMENT REGISTRY
successor cross-reference
successor
1711AUpgraded SuccessorGOVERNMENT REGISTRY
successor cross-reference
successor
2893RXInterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
1103MInterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
2UU01365InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
11756AInterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1A4757?
1A4757 is a BOLT,MACHINE.
What parts can replace 1A4757?
There are 10 known substitutes for 1A4757: 1601, 1711A, 2893RX and 7 more. Substitute compatibility should be verified for your specific system.
Is 1A4757 still available?
1A4757 is currently cancelled.
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