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PartsTable / COMPONENT / 91290A856
91290A856 ✓ 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 SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include color: BLACK OVERALL, material: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 20.0 MILLIMETERS NOMINAL MM, head_diameter: 30.0 MILLIMETERS NOMINAL MM, thread_length: 52.0 MILLIMETERS MINIMUM AND 64.5 MILLIMETERS MAXIMUM MM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-625-0958, 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
91290A856
NSN: 5305-01-625-0958
FSC: 5305
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
colorBLACK OVERALL
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height20.0 MILLIMETERS NOMINAL MM
head_diameter30.0 MILLIMETERS NOMINAL MM
thread_length52.0 MILLIMETERS MINIMUM AND 64.5 MILLIMETERS MAXIMUM MM
fastener_length80.0 MILLIMETERS NOMINAL MM
thread_directionRIGHT-HAND
surface_treatmentOXIDE OVERALL
width_across_flats17.0 MILLIMETERS NOMINAL MM
internal_drive_styleHEXAGON
end_item_identification2355-22-622-7966
NSN5305-01-625-0958
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91290A856 · 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 SERIES DESIGNATOR: M
•
COLOR: BLACK OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
HEAD DIAMETER: 30.0 MILLIMETERS NOMINAL MM
•
WIDTH ACROSS FLATS: 17.0 MILLIMETERS NOMINAL MM
•
NOMINAL THREAD DIAMETER: 20.0 MILLIMETERS MM
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORM
COLORBLACK OVERALL
THREAD DIRECTIONRIGHT-HAND
END ITEM IDENTIFICATION2355-22-622-7966
HEAD DIAMETER30.0 MILLIMETERS NOMINAL MM
PART NAME ASSIGNED BY CONTROLLING AGENCYSOCKET HEAD CAP SCREW
WIDTH ACROSS FLATS17.0 MILLIMETERS NOMINAL MM
NOMINAL THREAD DIAMETER20.0 MILLIMETERS MM
HEAD STYLEFLAT CHAMFER
EXTERNAL THREAD TOLERANCE CLASS6G G
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
169671CInterchangeable
interchangeable cross-reference
interchangeable
552842Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 91290A856?
91290A856 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 91290A856?
There are 2 known substitutes for 91290A856: 169671C, 552842. Substitute compatibility should be verified for your specific system.
What is the NSN for 91290A856?
91290A856 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-625-0958. 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