PartsTable
Technical Data Sheet
ACA-1639 ✓ Verified by PartsTable
· BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,TAPPING is a the manufacturer industrial component. Key specifications include head_style: PAN, head_height: 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN, head_diameter: 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN, fastener_length: 0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN, features_provided: CASEHARDENED, surface_treatment: CADMIUM AND CHROMATE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-432-4163, 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
ACA-1639
NSN: 5305-00-432-4163
FSC: 5305
CAGE: 76912 — ORO MANUFACTURING CO (USA)
SPECIFICATIONS
materialSTEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1524 OVERALL
head_stylePAN
head_height0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
head_diameter0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
fastener_length0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
features_providedCASEHARDENED
surface_treatmentCADMIUM AND CHROMATE OVERALL
internal_drive_styleCROSS RECESS TYPE 1
nonmachine_thread_styleGIMLET POINT (TYPE A, AB OR BA)
nondefinitive_spec/std_dataA TYPE
nonmachine_nominal_thread_diameter0.138 INCHES IN
material_document_and_classificationAISI ASSN STD ALL MATERIAL RESPONSES OR 66 FED STD ALL MATERIAL RESPONSES OVERALL
NSN5305-00-432-4163
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ACA-1639 · 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
NONMACHINE THREAD STYLE: GIMLET POINT (TYPE A, AB OR BA)
NONDEFINITIVE SPEC/STD DATA: AB TYPE
HEAD STYLE: PAN
FASTENER LENGTH: 0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
HEAD DIAMETER: 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
NONMACHINE THREAD STYLEGIMLET POINT (TYPE A, AB OR BA)
NONDEFINITIVE SPEC/STD DATAAB TYPE
HEAD STYLEPAN
FASTENER LENGTH0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
HEAD DIAMETER0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL OVERALL
HEAD HEIGHT0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
MS24621-17Interchangeable
interchangeable cross-reference
interchangeable
856980Interchangeable
interchangeable cross-reference
interchangeable
12215Interchangeable
interchangeable cross-reference
interchangeable
2012-T 15Interchangeable
interchangeable cross-reference
interchangeable
503-S 15Interchangeable
interchangeable cross-reference
interchangeable
200115Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ACA-1639?
ACA-1639 is a SCREW,TAPPING.
What parts can replace ACA-1639?
There are 23 known substitutes for ACA-1639: MS24621-17, 856980, 12215 and 20 more. Substitute compatibility should be verified for your specific system.
Is ACA-1639 still available?
ACA-1639 is currently cancelled.
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