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Technical Data Sheet
PartsTable / COMPONENT / 12861-899-45
12861-899-45 ✓ 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. Key specifications include diameter: 0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN, material: STEEL EJECTOR SPRING, drive_type: SLOTTED, eyelet_length: 0.532 INCHES NOMINAL IN, surface_treatment: CADMIUM AND CHROMATE OVERALL, stud_assembly_style: STUD ASSEMBLY. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-639-5054, 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
12861-899-45
NSN: 5325-00-639-5054
FSC: 5325
CAGE: 94756 — THE BOEING COMPANY DIV LEGACY BOEING HB1 (USA)
SPECIFICATIONS
diameter0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN
materialSTEEL EJECTOR SPRING
drive_typeSLOTTED
eyelet_length0.532 INCHES NOMINAL IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
stud_assembly_styleSTUD ASSEMBLY
securing_device_typeSPRING
eyelet_outside_diameter0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
turnlock_stud_head_styleFLAT COUNTERSUNK
material_accommodated_thickness0.411 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
material_document_and_classificationQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE EJECTOR SPRING
surface_treatment_document_and_classificationQQ-P-416,TY 2 CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL
NSN5325-00-639-5054
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12861-899-45 · 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
•
MATERIAL: STEEL COMP 4037 STUD
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE PIN
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2 CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 4037 STUD
MATERIALSTEEL COMP 1009 OR STEEL COMP 1050 OR STEEL COMP 1112 EYELET
MATERIALSTEEL PIN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE PIN
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE EJECTOR SPRING
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2 CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL
MATERIALSTEEL EJECTOR SPRING
DIAMETER0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN
MATERIAL ACCOMMODATED THICKNESS0.411 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
AN6-20Interchangeable
interchangeable cross-reference
interchangeable
400213Interchangeable
interchangeable cross-reference
interchangeable
SIA-1360Interchangeable
interchangeable cross-reference
interchangeable
40S5-13Interchangeable
interchangeable cross-reference
interchangeable
1142005-13Interchangeable
interchangeable cross-reference
interchangeable
BACS21X13RInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12861-899-45?
12861-899-45 is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace 12861-899-45?
There are 11 known substitutes for 12861-899-45: AN6-20, 400213, SIA-1360 and 8 more. Substitute compatibility should be verified for your specific system.
Is 12861-899-45 still available?
12861-899-45 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026