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171549H01 — SCREW ASSEMBLY,PANEL

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

171549H01: SCREW ASSEMBLY,PANEL.

The SCREW ASSEMBLY,PANEL is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 7075 STAND-OFF, head_style: PAN, head_height: 0.100 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN, fastener_length: 0.355 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-362-4459, 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
171549H01
NSN: 5305-01-362-4459
FSC: 5305 — Screws
CAGE: 61742 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 7075 STAND-OFF
head_stylePAN
head_height0.100 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
fastener_length0.355 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE FASTENER
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.132 INCHES IN
thread_quantity_per_inch32
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-362-4459
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 171549H01 · 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: 0.100 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.355 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
•
MATERIAL ACCOMMODATED THICKNESS: 0.049 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A581 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5636 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
•
NOMINAL THREAD DIAMETER: 0.132 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.100 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
FASTENER LENGTH0.355 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-A-8625 MIL SPEC 2ND TREATMENT RESPONSE STAND-OFF
MATERIAL ACCOMMODATED THICKNESS0.049 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A581 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5636 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/9 FED SPEC SINGLE MATERIAL RESPONSE OR AMS 4122 ASSN STD SINGLE MATERIAL RESPONSE STAND-OFF
NOMINAL THREAD DIAMETER0.132 INCHES IN
HEAD STYLEPAN
THREAD DIRECTIONRIGHT-HAND
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES 2
DP-7950-6-A-7Reference document
Same NSN cross-reference
Reference document — Secondary reference
FT1255P-6-1-7Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 171549H01?
171549H01 is a SCREW ASSEMBLY,PANEL.
What parts can replace 171549H01?
There are 2 known substitutes for 171549H01: DP-7950-6-A-7, FT1255P-6-1-7. Substitute compatibility should be verified for your specific system.
What is the NSN for 171549H01?
171549H01 is cataloged in the U.S. Government catalog under NSN 5305-01-362-4459. 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.