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Technical Data Sheet
PartsTable / COMPONENT / 1339AS731-1
1339AS731-1 ✓ 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

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN, material: STEEL OVERALL, drive_type: CROSS RECESS, eyelet_length: 0.322 INCHES NOMINAL IN, stud_head_height: 0.440 INCHES NOMINAL IN, surface_treatment: CADMIUM AND CHROMATE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-995-8345, 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
1339AS731-1
NSN: 5325-00-995-8345
FSC: 5325
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
diameter0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
materialSTEEL OVERALL
drive_typeCROSS RECESS
eyelet_length0.322 INCHES NOMINAL IN
stud_head_height0.440 INCHES NOMINAL IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
stud_assembly_styleSTUD ASSEMBLY
securing_device_typeSPRING
eyelet_outside_diameter0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
turnlock_stud_head_styleFILLISTER COUNTERSUNK
material_accommodated_thickness0.180 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN
surface_treatment_document_and_classificationQQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5325-00-995-8345
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1339AS731-1 · 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
•
EYELET OUTSIDE DIAMETER: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
EYELET LENGTH: 0.322 INCHES NOMINAL IN
•
SECURING DEVICE TYPE: SPRING
•
TURNLOCK STUD HEAD STYLE: FILLISTER COUNTERSUNK
•
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD: 0.722 INCHES MINIMUM AND 0.737 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
EYELET OUTSIDE DIAMETER0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
EYELET LENGTH0.322 INCHES NOMINAL IN
SECURING DEVICE TYPESPRING
TURNLOCK STUD HEAD STYLEFILLISTER COUNTERSUNK
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD0.722 INCHES MINIMUM AND 0.737 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
STUD HEAD HEIGHT0.440 INCHES NOMINAL IN
STUD ASSEMBLY STYLESTUD ASSEMBLY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
BACR11Y2Interchangeable
interchangeable cross-reference
interchangeable
0128392Interchangeable
interchangeable cross-reference
interchangeable
G65011Interchangeable
interchangeable cross-reference
interchangeable
50083594Interchangeable
interchangeable cross-reference
interchangeable
26S8-6Interchangeable
interchangeable cross-reference
interchangeable
HS4431-7Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1339AS731-1?
1339AS731-1 is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace 1339AS731-1?
There are 11 known substitutes for 1339AS731-1: BACR11Y2, 0128392, G65011 and 8 more. Substitute compatibility should be verified for your specific system.
Is 1339AS731-1 still available?
1339AS731-1 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026