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21212541-556 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

21212541-556: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5305-01-166-2140, 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
21212541-556
NSN: 5305-01-166-2140
FSC: 5305 — Screws
CAGE: S3465 — BAE SYSTEMS HAGGLUNDS AB (SWE)
SPECIFICATIONS
Part Number21212541-556
NSN5305-01-166-2140
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 21212541-556 · 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
SUBSTITUTES & CROSS-REFERENCES 3
HE010508Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
90562-991Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
010508Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21212541-556?
21212541-556 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 21212541-556?
There are 3 known substitutes for 21212541-556: HE010508, 90562-991, 010508. Substitute compatibility should be verified for your specific system.
What is the NSN for 21212541-556?
21212541-556 is cataloged in the U.S. Government catalog under NSN 5305-01-166-2140. This indicates validated use in U.S. government and defense supply chains.
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