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443997 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

443997: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, head_style: HEXAGON EXTENDED WASHER, head_height: 0.485 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN, thread_length: 0.353 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN, surface_finish: 32.0 MICROINCHES THREADS, fastener_length: 0.415 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-448-7500, 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
443997
NSN: 5306-00-448-7500
FSC: 5306 — Bolts
CAGE: 93907 — TEXTRON FASTENING SYSTEMS DBA DECORAH OPERATIONS TFS (USA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
head_styleHEXAGON EXTENDED WASHER
head_height0.485 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN
thread_length0.353 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES THREADS
fastener_length0.415 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
hardness_rating24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
precious_materialSILVER
surface_treatmentSILVER OVERALL
width_between_flats0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
NSN5306-00-448-7500
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 443997 · 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 FINISH: 32.0 MICROINCHES THREADS
•
EXTENDED WASHER THICKNESS: 0.195 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.485 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.415 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 0.340 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
•
PRECIOUS MATERIAL: SILVER
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES THREADS
SURFACE FINISH63.0 MICROINCHES BEARING SURFACE OF HEAD
EXTENDED WASHER THICKNESS0.195 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
HEAD HEIGHT0.485 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN
FASTENER LENGTH0.415 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER0.340 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
PRECIOUS MATERIALSILVER
THREAD LENGTH0.353 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN
HARDNESS RATING24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
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 443997?
443997 is a BOLT,MACHINE.
What is the NSN for 443997?
443997 is cataloged in the U.S. Government catalog under NSN 5306-00-448-7500. 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.