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31-9987-1 — MOUNTING PAD,ELECTRICAL-ELECTRON

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

31-9987-1: MOUNTING PAD,ELECTRICAL-ELECTRON.

MOUNTING PAD,ELECTRICAL-ELECTRON. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: HEADLESS (SETSCREW), point_style: FLAT, thread_class: 2A A, thread_length: 0.156 INCHES MAXIMUM IN, fastener_length: 0.156 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-791-4937, 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
31-9987-1
NSN: 5305-00-791-4937
NIINs: 007914937, 016005572
FSC: 5305 — Screws
CAGE: 14418 — UNISYS CORP DEFENSE SYSTEMS C S D FIELD ENGINEERING (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleHEADLESS (SETSCREW)
point_styleFLAT
thread_class2A A
thread_length0.156 INCHES MAXIMUM IN
fastener_length0.156 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter0.112 INCHES IN
thread_quantity_per_inch40
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-00-791-4937
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 31-9987-1 · 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
•
FASTENER LENGTH: 0.156 INCHES NOMINAL IN
•
THREAD LENGTH: 0.156 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.112 INCHES IN
•
HEAD STYLE: HEADLESS (SETSCREW)
•
THREAD DIRECTION: RIGHT-HAND
•
POINT STYLE: FLAT
•
INTERNAL DRIVE STYLE: SLOT
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS
FASTENER LENGTH0.156 INCHES NOMINAL IN
THREAD LENGTH0.156 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.112 INCHES IN
HEAD STYLEHEADLESS (SETSCREW)
THREAD DIRECTIONRIGHT-HAND
POINT STYLEFLAT
INTERNAL DRIVE STYLESLOT
THREAD CLASS2A A
THREAD QUANTITY PER INCH40
MATERIALSTEEL CORROSION RESISTING OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
752-3512-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
10315843Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 31-9987-1?
31-9987-1 is a MOUNTING PAD,ELECTRICAL-ELECTRON.
What parts can replace 31-9987-1?
There are 2 known substitutes for 31-9987-1: 752-3512-2, 10315843. Substitute compatibility should be verified for your specific system.
What is the NSN for 31-9987-1?
31-9987-1 is cataloged in the U.S. Government catalog under NSN 5305-00-791-4937. 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.