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12266025 — BOLT,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

12266025: BOLT,EXTERNALLY RELIEVED BODY.

The BOLT,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.328 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.670 INCHES NOMINAL IN, fastener_length: 3.576 INCHES MINIMUM AND 3.596 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-050-2077, 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
12266025
NSN: 5306-01-050-2077
FSC: 5306 — Bolts
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.328 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
thread_class3A A
thread_length0.670 INCHES NOMINAL IN
fastener_length3.576 INCHES MINIMUM AND 3.596 INCHES MAXIMUM IN
hardness_rating34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_between_flats0.928 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
nominal_thread_diameter0.500 INCHES IN
first_diameter_from_head0.390 INCHES MINIMUM AND 0.400 INCHES MAXIMUM IN
NSN5306-01-050-2077
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12266025 · 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
•
HEAD HEIGHT: 0.328 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
•
FASTENER LENGTH: 3.576 INCHES MINIMUM AND 3.596 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,CLASS 1,TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.670 INCHES NOMINAL IN
•
HARDNESS RATING: 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5626,COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6049,COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6098,COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-8503,COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
FIRST DIAMETER FROM HEAD: 0.390 INCHES MINIMUM AND 0.400 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.328 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
FASTENER LENGTH3.576 INCHES MINIMUM AND 3.596 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,CLASS 1,TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.670 INCHES NOMINAL IN
HARDNESS RATING34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5626,COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6049,COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6098,COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-8503,COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
FIRST DIAMETER FROM HEAD0.390 INCHES MINIMUM AND 0.400 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.500 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
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 1
666803-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 12266025?
12266025 is a BOLT,EXTERNALLY RELIEVED BODY.
What parts can replace 12266025?
There is 1 known substitute for 12266025: 666803-3. Substitute compatibility should be verified for your specific system.
What is the NSN for 12266025?
12266025 is cataloged in the U.S. Government catalog under NSN 5306-01-050-2077. 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.