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402288 — COUPLER,DIRECTIONAL

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

402288: COUPLER,DIRECTIONAL.

The COUPLER,DIRECTIONAL is a the manufacturer industrial component. Key specifications include unit_type: COAXIAL LINE AND WAVEGUIDE, head_style: HEXAGON, design_type: BIDIRECTIONAL, grip_length: 1.000 INCHES NOMINAL IN, head_height: 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN, thread_class: 3A A. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-182-1523, 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
402288
NSN: 5306-00-182-1523
NIINs: 001821523, 009860507, 010215777, 012980250, 016547567
FSC: 5306 — Bolts
CAGE: 77294 — PIPER INDUSTRIAL MANUFACTURING COMPANY, LLC DIV PIPER INDUSTRIAL MANUFACTURING COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4140 OR STEEL COMP 4130 OR STEEL COMP 4037 OVERALL
unit_typeCOAXIAL LINE AND WAVEGUIDE
head_styleHEXAGON
design_typeBIDIRECTIONAL
grip_length1.000 INCHES NOMINAL IN
head_height0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
thread_class3A A
usage_designMAIN LINE AND SECONDARY LINE TERMINAL FITTING
grip_diameter0.1889 INCHES MINIMUM AND 0.1894 INCHES MAXIMUM IN
overall_width1.875 INCHES NOMINAL IN
thread_length0.406 INCHES MINIMUM IN
overall_height6.065 INCHES NOMINAL IN
NSN5306-00-182-1523
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 402288 · 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
•
SURFACE FINISH: 63.0 MICROINCHES GRIP
•
HEAD HEIGHT: 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.406 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
•
THREAD LENGTH: 0.406 INCHES MINIMUM IN
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 5TH MATERIAL RESPONSE OR AMS 6300 ASSN STD 6TH MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH63.0 MICROINCHES GRIP
SURFACE FINISH63.0 MICROINCHES BEARING SURFACE OF HEAD
HEAD HEIGHT0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
FASTENER LENGTH1.406 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
THREAD LENGTH0.406 INCHES MINIMUM IN
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 5TH MATERIAL RESPONSE OR AMS 6300 ASSN STD 6TH MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEHEXAGON
SUBSTITUTES & CROSS-REFERENCES 1
AN173-13ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 402288?
402288 is a COUPLER,DIRECTIONAL.
What parts can replace 402288?
There is 1 known substitute for 402288: AN173-13A. Substitute compatibility should be verified for your specific system.
What is the NSN for 402288?
402288 is cataloged in the U.S. Government catalog under NSN 5306-00-182-1523. 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.