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A15D3550-1 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

A15D3550-1: BOLT,CLOSE TOLERANCE.

The BOLT,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, grip_length: 0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN, head_height: 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.2482 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN, thread_length: 0.390 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-021-8358, 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
A15D3550-1
NSN: 5306-01-021-8358
FSC: 5306 — Bolts
CAGE: 77272 — THE BOEING COMPANY (USA)
SPECIFICATIONS
head_styleHEXAGON
grip_length0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
head_height0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.2482 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN
thread_length0.390 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES BEARING SURFACE OF HEAD
fastener_length0.700 INCHES MINIMUM AND 0.720 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_between_flats0.438 INCHES NOMINAL IN
nominal_thread_diameter0.250 INCHES IN
NSN5306-01-021-8358
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: A15D3550-1 · 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 GRIP
•
HEAD HEIGHT: 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.700 INCHES MINIMUM AND 0.720 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: BAC5751 METHOD 2,FSCM 77272 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.390 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE FINISH32.0 MICROINCHES BEARING SURFACE OF HEAD
HEAD HEIGHT0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
FASTENER LENGTH0.700 INCHES MINIMUM AND 0.720 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONBAC5751 METHOD 2,FSCM 77272 MFR REF SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.390 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.250 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

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 A15D3550-1?
A15D3550-1 is a BOLT,CLOSE TOLERANCE.
What is the NSN for A15D3550-1?
A15D3550-1 is cataloged in the U.S. Government catalog under NSN 5306-01-021-8358. 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.