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S235A163-20 — SCREW,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

S235A163-20: SCREW,EXTERNALLY RELIEVED BODY.

The SCREW,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include head_style: PAN, head_height: 0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.307 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, thread_length: 0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN, fastener_length: 0.844 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-216-9055, 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
S235A163-20
NSN: 5305-01-216-9055
FSC: 5305 — Screws
CAGE: 78711 — TELEPHONICS CORP (USA)
SPECIFICATIONS
head_stylePAN
head_height0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.307 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
thread_length0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
fastener_length0.844 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.164 INCHES IN
first_diameter_from_head0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
thread_quantity_per_inch32
NSN5305-01-216-9055
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: S235A163-20 · 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: 0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.844 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
FIRST DIAMETER FROM HEAD: 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
•
HEAD STYLE: PAN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
FASTENER LENGTH0.844 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
FIRST DIAMETER FROM HEAD0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.164 INCHES IN
HEAD STYLEPAN
THREAD DIRECTIONRIGHT-HAND
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.516 INCHES MINIMUM AND 0.579 INCHES MAXIMUM IN
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

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 S235A163-20?
S235A163-20 is a SCREW,EXTERNALLY RELIEVED BODY.
What is the NSN for S235A163-20?
S235A163-20 is cataloged in the U.S. Government catalog under NSN 5305-01-216-9055. 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.