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Technical Data Sheet
PartsTable / COMPONENT / BACS21X11S
BACS21X11S ✓ 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

STUD ASSEMBLY,TURNLOCK FASTENER. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-727-9945, 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
BACS21X11S
NSN: 5325-00-727-9945
FSC: 5325
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
Part NumberBACS21X11S
NSN5325-00-727-9945
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BACS21X11S · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
BACS21X10Interchangeable
interchangeable cross-reference
interchangeable
4002-10Interchangeable
interchangeable cross-reference
interchangeable
BACS21X10SInterchangeable
interchangeable cross-reference
interchangeable
4002-10SInterchangeable
interchangeable cross-reference
interchangeable
BACS21XInterchangeable
interchangeable cross-reference
interchangeable
BACS21X10CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BACS21X11S?
BACS21X11S is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace BACS21X11S?
There are 11 known substitutes for BACS21X11S: BACS21X10, 4002-10, BACS21X10S and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BACS21X11S?
BACS21X11S is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-727-9945. 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