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BACS21EE6FR — STUD ASSEMBLY,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

BACS21EE6FR: STUD ASSEMBLY,TURNLOCK FASTENER.

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.388 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN, material: STEEL COMP 4037 STUD, drive_type: CROSS RECESS, eyelet_length: 0.328 INCHES NOMINAL IN, stud_head_height: 0.069 INCHES MINIMUM AND 0.076 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-067-5716, 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
BACS21EE6FR
NSN: 5325-00-067-5716
FSC: 5325 — Fastening Devices
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
diameter0.388 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN
materialSTEEL COMP 4037 STUD
drive_typeCROSS RECESS
eyelet_length0.328 INCHES NOMINAL IN
stud_head_height0.069 INCHES MINIMUM AND 0.076 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
stud_assembly_styleSTUD ASSEMBLY
eyelet_outside_diameter0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
turnlock_stud_head_styleSTUD HEAD
material_accommodated_thickness0.150 INCHES MINIMUM AND 0.569 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE EYELET
surface_treatment_document_and_classificationQQ-P-416,CL 2,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5325-00-067-5716
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BACS21EE6FR · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,CL 2,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EYELET OUTSIDE DIAMETER: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
DRIVE TYPE: CROSS RECESS
•
MATERIAL ACCOMMODATED THICKNESS: 0.150 INCHES MINIMUM AND 0.569 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE PIN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,CL 2,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EYELET OUTSIDE DIAMETER0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
DRIVE TYPECROSS RECESS
MATERIAL ACCOMMODATED THICKNESS0.150 INCHES MINIMUM AND 0.569 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE PIN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A322 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A331 ASSN STD 2ND MATERIAL RESPONSE STUD
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE EJECTOR SPRING
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE EYELET
DIAMETER0.388 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN
STUD HEAD HEIGHT0.069 INCHES MINIMUM AND 0.076 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 9
27S3-06Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
532002-5Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
1127004-6Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
18509574-6Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2703-6Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
2753-6Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is BACS21EE6FR?
BACS21EE6FR is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace BACS21EE6FR?
There are 9 known substitutes for BACS21EE6FR: 27S3-06, 532002-5, 1127004-6 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BACS21EE6FR?
BACS21EE6FR is cataloged in the U.S. Government catalog under NSN 5325-00-067-5716. 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.