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4048153 — BOLT,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

4048153: BOLT,EXTERNALLY RELIEVED BODY.

The BOLT,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: NICKEL OVERALL, thread_class: 3A A, thread_length: 0.445 INCHES NOMINAL IN, fastener_length: 1.890 INCHES MINIMUM AND 1.910 INCHES MAXIMUM IN, thread_direction: RIGHT-HAND, nominal_thread_diameter: 0.312 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-026-6875, 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
4048153
NSN: 5306-01-026-6875
FSC: 5306 — Bolts
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialNICKEL OVERALL
thread_class3A A
thread_length0.445 INCHES NOMINAL IN
fastener_length1.890 INCHES MINIMUM AND 1.910 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.312 INCHES IN
first_diameter_from_head0.335 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN
third_diameter_from_head0.318 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
thread_quantity_per_inch24
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF)
fourth_diameter_from_head0.247 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
second_diameter_from_head0.247 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
NSN5306-01-026-6875
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4048153 · 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: 0.247 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.890 INCHES MINIMUM AND 1.910 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.445 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: PWA92 FSCM 77445 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
FIRST DIAMETER FROM HEAD: 0.335 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER: 1.050 INCHES MINIMUM AND 1.070 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER: 1.135 INCHES MINIMUM AND 1.155 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
FOURTH DIAMETER FROM HEAD0.247 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
FASTENER LENGTH1.890 INCHES MINIMUM AND 1.910 INCHES MAXIMUM IN
THREAD LENGTH0.445 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONPWA92 FSCM 77445 MFR REF SINGLE MATERIAL RESPONSE OVERALL
FIRST DIAMETER FROM HEAD0.335 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER1.050 INCHES MINIMUM AND 1.070 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.312 INCHES IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER1.135 INCHES MINIMUM AND 1.155 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
SECOND DIAMETER FROM HEAD0.247 INCHES MINIMUM AND 0.251 INCHES MAXIMUM 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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4048153?
4048153 is a BOLT,EXTERNALLY RELIEVED BODY.
What is the NSN for 4048153?
4048153 is cataloged in the U.S. Government catalog under NSN 5306-01-026-6875. 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.