BACS21X11AR — STUD ASSEMBLY,TURNLOCK FASTENER

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

BACS21X11AR: STUD ASSEMBLY,TURNLOCK FASTENER.

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN, material: COPPER ALLOY EYELET, drive_type: CROSS RECESS, eyelet_length: 0.472 INCHES NOMINAL IN, stud_head_height: 0.092 INCHES NOMINAL IN, surface_treatment: CADMIUM AND CHROMATE EYELET. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-570-0499, 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

BACS21X11AR

NSN: 5325-00-570-0499
FSC: 5325 — Fastening Devices
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)

SPECIFICATIONS

diameter	0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN
material	COPPER ALLOY EYELET
drive_type	CROSS RECESS
eyelet_length	0.472 INCHES NOMINAL IN
stud_head_height	0.092 INCHES NOMINAL IN
surface_treatment	CADMIUM AND CHROMATE EYELET
stud_assembly_style	STUD ASSEMBLY
securing_device_type	WASHER
eyelet_outside_diameter	0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
turnlock_stud_head_style	STUD HEAD
material_accommodated_thickness	0.351 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
material_document_and_classification	AMS 5731 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5525 ASSN STD 2ND MATERIAL RESPONSE STUD
NSN	5325-00-570-0499

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE STUD

•

EYELET OUTSIDE DIAMETER: 0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN

•

DRIVE TYPE: CROSS RECESS

•

MATERIAL ACCOMMODATED THICKNESS: 0.351 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5731 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5525 ASSN STD 2ND MATERIAL RESPONSE STUD

•

DIAMETER: 0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN

•

STUD HEAD HEIGHT: 0.092 INCHES NOMINAL IN

TECHNICAL CHARACTERISTICS

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE STUD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE EYELET
EYELET OUTSIDE DIAMETER	0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
DRIVE TYPE	CROSS RECESS
MATERIAL ACCOMMODATED THICKNESS	0.351 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5731 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5525 ASSN STD 2ND MATERIAL RESPONSE STUD
DIAMETER	0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN
STUD HEAD HEIGHT	0.092 INCHES NOMINAL IN
SECURING DEVICE TYPE	WASHER
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD	0.723 INCHES MINIMUM AND 0.733 INCHES MAXIMUM IN

OTHER ITEMS IN FSC 5325 — Fastening Devices

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317

SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is BACS21X11AR?

BACS21X11AR is a STUD ASSEMBLY,TURNLOCK FASTENER.

What is the NSN for BACS21X11AR?

BACS21X11AR is cataloged in the U.S. Government catalog under NSN 5325-00-570-0499. This indicates validated use in U.S. government and defense supply chains.

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BACS21X11AR — STUD ASSEMBLY,TURNLOCK FASTENER

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