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21532041-1 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

21532041-1: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include thread_direction: RIGHT-HAND, end_item_identification: ALCO 251 DIESEL ENGINE, nominal_thread_diameter: 0.875 INCHES IN, thread_series_designator: UN, part_name_assigned_by_controlling_agency: CAPSCREW, CYLINDER BLOCK TO BASE. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-470-5243, 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
21532041-1
NSN: 5305-01-470-5243
FSC: 5305 — Screws
CAGE: 7PZX0 — FAIRBANKS MORSE, LLC (USA)
SPECIFICATIONS
thread_directionRIGHT-HAND
end_item_identificationALCO 251 DIESEL ENGINE
nominal_thread_diameter0.875 INCHES IN
thread_quantity_per_inch9
thread_series_designatorUN
part_name_assigned_by_controlling_agencyCAPSCREW, CYLINDER BLOCK TO BASE
NSN5305-01-470-5243
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 21532041-1 · 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
•
NOMINAL THREAD DIAMETER: 0.875 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 9
•
THREAD SERIES DESIGNATOR: UN
TECHNICAL CHARACTERISTICS
NOMINAL THREAD DIAMETER0.875 INCHES IN
THREAD DIRECTIONRIGHT-HAND
PART NAME ASSIGNED BY CONTROLLING AGENCYCAPSCREW, CYLINDER BLOCK TO BASE
END ITEM IDENTIFICATIONALCO 251 DIESEL ENGINE
THREAD QUANTITY PER INCH9
THREAD SERIES DESIGNATORUN
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21532041-1?
21532041-1 is a SCREW,CAP,HEXAGON HEAD.
What is the NSN for 21532041-1?
21532041-1 is cataloged in the U.S. Government catalog under NSN 5305-01-470-5243. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.