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701257 — BOLT,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

701257: BOLT,EXTERNALLY RELIEVED BODY.

The BOLT,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, head_style: DEE, head_height: 0.200 INCHES NOMINAL IN, head_diameter: 0.705 INCHES MINIMUM AND 0.709 INCHES MAXIMUM IN, thread_length: 0.410 INCHES MINIMUM IN, fastener_length: 2.690 INCHES MINIMUM AND 2.700 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-926-5633, 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
701257
NSN: 5306-00-926-5633
FSC: 5306 — Bolts
CAGE: 03104 — TELEDYNE BROWN ENGINEERING, INC. DBA TELEDYNE TURBINE ENGINES DIV TELEDYNE TURBINE ENGINES (USA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
head_styleDEE
head_height0.200 INCHES NOMINAL IN
head_diameter0.705 INCHES MINIMUM AND 0.709 INCHES MAXIMUM IN
thread_length0.410 INCHES MINIMUM IN
fastener_length2.690 INCHES MINIMUM AND 2.700 INCHES MAXIMUM IN
hardness_rating248.0 BRINELL STANDARD MINIMUM AND 341.0 BRINELL STANDARD MAXIMUM OVERALL
special_featuresSIXTH DIA FROM HEAD 0.4720 IN. MIN DIA TO 0.4724 IN. MAX DIA AND LOCATED 2.170 IN. FROM THE BEARING SURFACE IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.469 INCHES IN
fifth_diameter_from_head0.402 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
first_diameter_from_head0.402 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
NSN5306-00-926-5633
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 701257 · 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: 0.472 INCHES NOMINAL IN
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIFTH DIAMETER: 1.790 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.200 INCHES NOMINAL IN
•
FASTENER LENGTH: 2.690 INCHES MINIMUM AND 2.700 INCHES MAXIMUM IN
•
DISTANCE FROM CENTERLINE TO FLAT: 0.293 INCHES MINIMUM AND 0.298 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.410 INCHES MINIMUM IN
•
HARDNESS RATING: 248.0 BRINELL STANDARD MINIMUM AND 341.0 BRINELL STANDARD MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
FOURTH DIAMETER FROM HEAD0.472 INCHES NOMINAL IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIFTH DIAMETER1.790 INCHES NOMINAL IN
HEAD HEIGHT0.200 INCHES NOMINAL IN
FASTENER LENGTH2.690 INCHES MINIMUM AND 2.700 INCHES MAXIMUM IN
DISTANCE FROM CENTERLINE TO FLAT0.293 INCHES MINIMUM AND 0.298 INCHES MAXIMUM IN
THREAD LENGTH0.410 INCHES MINIMUM IN
HARDNESS RATING248.0 BRINELL STANDARD MINIMUM AND 341.0 BRINELL STANDARD MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FIRST DIAMETER FROM HEAD0.402 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER0.430 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 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 701257?
701257 is a BOLT,EXTERNALLY RELIEVED BODY.
What is the NSN for 701257?
701257 is cataloged in the U.S. Government catalog under NSN 5306-00-926-5633. 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.