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A51B19019-1 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

A51B19019-1: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: PAN NO. 2, head_height: 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN, thread_length: 0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN, screw_material: STEEL.

This part is cataloged in the U.S. Government catalog under NSN 5305-01-336-9604, 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
A51B19019-1
NSN: 5305-01-336-9604
FSC: 5305 — Screws
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
head_stylePAN NO. 2
head_height0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
thread_length0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
screw_materialSTEEL
fastener_length0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE III
nominal_thread_diameter0.138 INCHES IN
screw_surface_treatmentCADMIUM AND CHROMATE
minimum_tensile_strength60000 POUNDS PER SQUARE INCH LBS
NSN5305-01-336-9604
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: A51B19019-1 · 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
•
HEAD HEIGHT: 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: CADMIUM AND CHROMATE
•
FASTENER LENGTH: 0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
•
HEAD STYLE: PAN NO. 2
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTCADMIUM AND CHROMATE
FASTENER LENGTH0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
THREAD LENGTH0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.138 INCHES IN
HEAD STYLEPAN NO. 2
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL
MINIMUM TENSILE STRENGTH60000 POUNDS PER SQUARE INCH LBS
INTERNAL DRIVE STYLECROSS RECESS TYPE III
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: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51B19019-1?
A51B19019-1 is a SCREW,MACHINE.
What is the NSN for A51B19019-1?
A51B19019-1 is cataloged in the U.S. Government catalog under NSN 5305-01-336-9604. 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.