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1074251 — BOLT,INTERNAL WRENCHING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1074251: BOLT,INTERNAL WRENCHING.

The BOLT,INTERNAL WRENCHING is a the manufacturer industrial component. Key specifications include head_style: FLAT CHAMFER, head_height: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, thread_length: 0.219 INCHES NOMINAL IN, fastener_length: 4.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-590-5986, 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
1074251
NSN: 5306-00-590-5986
FSC: 5306 — Bolts
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
head_styleFLAT CHAMFER
head_height0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
thread_length0.219 INCHES NOMINAL IN
fastener_length4.250 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_across_flats0.188 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.250 INCHES IN
first_diameter_from_head0.375 INCHES NOMINAL IN
third_diameter_from_head0.250 INCHES NOMINAL IN
NSN5306-00-590-5986
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1074251 · 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
•
FOURTH DIAMETER FROM HEAD: 0.177 INCHES MINIMUM AND 0.182 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.188 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
FASTENER LENGTH: 4.250 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.219 INCHES NOMINAL IN
•
FIRST DIAMETER FROM HEAD: 0.375 INCHES NOMINAL IN
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER: 1.281 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FOURTH DIAMETER FROM HEAD0.177 INCHES MINIMUM AND 0.182 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.188 INCHES NOMINAL IN
HEAD HEIGHT0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
FASTENER LENGTH4.250 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.219 INCHES NOMINAL IN
FIRST DIAMETER FROM HEAD0.375 INCHES NOMINAL IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER1.281 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER1.406 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-004-7044 5306-00-007-6129 5306-00-008-7899 5306-00-009-4739 5306-00-118-7332 5306-00-151-1777 5306-00-255-4507 5306-01-101-2459
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 1074251?
1074251 is a BOLT,INTERNAL WRENCHING.
What is the NSN for 1074251?
1074251 is cataloged in the U.S. Government catalog under NSN 5306-00-590-5986. 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.