PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 12861-899-31
12861-899-31 ✓ 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 PIN, drive_type: SLOTTED, eyelet_length: 0.292 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 5325-00-290-8235, 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
12861-899-31
NSN: 5325-00-290-8235
FSC: 5325
CAGE: 94756 — THE BOEING COMPANY DIV LEGACY BOEING HB1 (USA)
SPECIFICATIONS
diameter0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN
materialSTEEL PIN
drive_typeSLOTTED
eyelet_length0.292 INCHES NOMINAL IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
stud_assembly_styleSTUD ASSEMBLY
eyelet_outside_diameter0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
turnlock_stud_head_styleFLAT COUNTERSUNK
material_accommodated_thickness0.171 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
material_document_and_classificationQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE PIN
surface_treatment_document_and_classificationQQ-P-416,TY 2 CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL
distance_from_engaging_member_to_largest_bearing_surface_of_head0.543 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN
NSN5325-00-290-8235
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12861-899-31 · 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
•
DRIVE TYPE: SLOTTED
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2 CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE EJECTOR SPRING
•
STUD ASSEMBLY STYLE: STUD ASSEMBLY
•
MATERIAL: STEEL EYELET
•
EYELET LENGTH: 0.292 INCHES NOMINAL IN
•
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD: 0.543 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
DRIVE TYPESLOTTED
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2 CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE EJECTOR SPRING
STUD ASSEMBLY STYLESTUD ASSEMBLY
MATERIALSTEEL EYELET
MATERIALSTEEL EJECTOR SPRING
EYELET LENGTH0.292 INCHES NOMINAL IN
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD0.543 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN
MATERIALSTEEL PIN
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
SL4732PC54Interchangeable
interchangeable cross-reference
interchangeable
HL-40025Interchangeable
interchangeable cross-reference
interchangeable
SL4639PC54Interchangeable
interchangeable cross-reference
interchangeable
40025Interchangeable
interchangeable cross-reference
interchangeable
A17672Interchangeable
interchangeable cross-reference
interchangeable
173079Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12861-899-31?
12861-899-31 is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace 12861-899-31?
There are 26 known substitutes for 12861-899-31: SL4732PC54, HL-40025, SL4639PC54 and 23 more. Substitute compatibility should be verified for your specific system.
Is 12861-899-31 still available?
12861-899-31 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026