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12446871-18 — INSERT,SCREW THREAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

12446871-18: INSERT,SCREW THREAD.

The INSERT,SCREW THREAD is a the manufacturer industrial component. Key specifications include length: 0.439 INCHES NOMINAL IN, material: STEEL OVERALL, thread_class: 2B, thread_length: 0.405 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN, flange_diameter: 0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN, flange_thickness: 0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-570-8646, 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
12446871-18
NSN: 5325-01-570-8646
FSC: 5325 — Fastening Devices
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
length0.439 INCHES NOMINAL IN
materialSTEEL OVERALL
thread_class2B
thread_length0.405 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
flange_diameter0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
flange_thickness0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
special_featuresGRIP RANGE .020-.080
style_designatorFLANGE
thread_directionRIGHT-HAND
surface_treatmentTIN AND ZINC OVERALL
width_across_flats0.265 INCHES NOMINAL IN
nominal_thread_size0.138 INCHES IN
NSN5325-01-570-8646
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12446871-18 · 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
•
FLANGE DIAMETER: 0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.265 INCHES NOMINAL IN
•
LENGTH: 0.439 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: BPS-TZ-327 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
FLANGE THICKNESS: 0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.405 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: FLANGE
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A108 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.265 INCHES NOMINAL IN
LENGTH0.439 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONBPS-TZ-327 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
FLANGE THICKNESS0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
THREAD LENGTH0.405 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
STYLE DESIGNATORFLANGE
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A108 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.138 INCHES IN
SUBSTITUTES & CROSS-REFERENCES 1
12446871Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 12446871-18?
12446871-18 is a INSERT,SCREW THREAD.
What parts can replace 12446871-18?
There is 1 known substitute for 12446871-18: 12446871. Substitute compatibility should be verified for your specific system.
What is the NSN for 12446871-18?
12446871-18 is cataloged in the U.S. Government catalog under NSN 5325-01-570-8646. 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.