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PartsTable / COMPONENT / 913-491
913-491 ✓ 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 INSULATOR,PLATE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 3135 OVERALL, head_style: HEXAGON, head_height: 0.318 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.803 INCHES MINIMUM AND 0.823 INCHES MAXIMUM IN, fastener_length: 1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-752-1001, 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
913-491
NSN: 5306-00-752-1001
FSC: 5306
CAGE: 58275 — SASCO INC CANADIAN DIV
SPECIFICATIONS
materialSTEEL COMP 3135 OVERALL
head_styleHEXAGON
head_height0.318 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN
thread_class3A A
thread_length0.803 INCHES MINIMUM AND 0.823 INCHES MAXIMUM IN
fastener_length1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN
hardness_rating24.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
width_between_flats0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
nominal_thread_diameter0.500 INCHES IN
thread_quantity_per_inch20
NSN5306-00-752-1001
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 913-491 · 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 LENGTH: 0.803 INCHES MINIMUM AND 0.823 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN
•
WIDTH BETWEEN FLATS: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
•
FEATURES PROVIDED: FINISHED HEAD
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
THREAD SERIES DESIGNATOR: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD QUANTITY PER INCH: 20
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH0.803 INCHES MINIMUM AND 0.823 INCHES MAXIMUM IN
FASTENER LENGTH1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
FEATURES PROVIDEDFINISHED HEAD
NOMINAL THREAD DIAMETER0.500 INCHES IN
THREAD SERIES DESIGNATORUNF
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD QUANTITY PER INCH20
HARDNESS RATING24.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
MATERIALSTEEL COMP 3135 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
BT287Interchangeable
interchangeable cross-reference
interchangeable
K23019Interchangeable
interchangeable cross-reference
interchangeable
AR43634Interchangeable
interchangeable cross-reference
interchangeable
745352Interchangeable
interchangeable cross-reference
interchangeable
752100-1Interchangeable
interchangeable cross-reference
interchangeable
RYDSMSDInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 913-491?
913-491 is a INSULATOR,PLATE.
What parts can replace 913-491?
There are 9 known substitutes for 913-491: BT287, K23019, AR43634 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 913-491?
913-491 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-752-1001. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026