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544538 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

544538: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OR STEEL CORROSION RESISTING OVERALL, hole_type: DRILLED, head_style: FLAT CHAMFER, head_height: 0.140 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-920-1106, 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
544538
NSN: 5305-00-920-1106
FSC: 5305 — Screws
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OR STEEL CORROSION RESISTING OVERALL
hole_typeDRILLED
head_styleFLAT CHAMFER
head_height0.140 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
hole_diameter0.046 INCHES NOMINAL IN
hole_quantity4
thread_length0.380 INCHES NOMINAL IN
fastener_length0.365 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
hardness_rating100.0 ROCKWELL B MINIMUM OVERALL
thread_directionRIGHT-HAND
NSN5305-00-920-1106
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 544538 · 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
•
WIDTH ACROSS FLATS: 0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.140 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.365 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.380 INCHES NOMINAL IN
•
HARDNESS RATING: 100.0 ROCKWELL B MINIMUM OVERALL
•
HOLE CONFIGURATION STYLE: ROUND INTERNAL HEXAGON
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-7720 COND A MIL SPEC 1ST MATERIAL RESPONSE OR AMS 5639 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5640 ASSN STD 2ND MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
HEAD HEIGHT0.140 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
FASTENER LENGTH0.365 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
THREAD LENGTH0.380 INCHES NOMINAL IN
HARDNESS RATING100.0 ROCKWELL B MINIMUM OVERALL
HOLE CONFIGURATION STYLEROUND INTERNAL HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7720 COND A MIL SPEC 1ST MATERIAL RESPONSE OR AMS 5639 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5640 ASSN STD 2ND MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
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 544538?
544538 is a SCREW,CAP,SOCKET HEAD.
What is the NSN for 544538?
544538 is cataloged in the U.S. Government catalog under NSN 5305-00-920-1106. This indicates validated use in U.S. government and defense supply chains.
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