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1131-943 — SCREW,SELF-DRILLING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1131-943: SCREW,SELF-DRILLING.

The SCREW,SELF-DRILLING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 410 OVERALL, head_style: HEXAGON EXTENDED WASHERHEXAGON EXTENDED WASHER, head_height: 0.115 INCHES MINIMUM AND 0.115 INCHES MINIMUM AND 0.141 INCHES MAXIMUM0.141 INCHES MAXIMUM IN, point_style: SELF-DRILLINGSELF-DRILLING, pilot_length: 0.1812 INCHES MINIMUM AND 0.1812 INCHES MINIMUM AND 0.2008 INCHES MAXIMUM0.2008 INCHES MAXIMUM IN, fastener_length: 0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-181-0650, 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
1131-943
NSN: 5310-01-181-0650
NIINs: 011810650, 015612237
FSC: 5310 — Nuts and Washers
CAGE: 31361 — WOODWARD, INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 410 OVERALL
head_styleHEXAGON EXTENDED WASHERHEXAGON EXTENDED WASHER
head_height0.115 INCHES MINIMUM AND 0.115 INCHES MINIMUM AND 0.141 INCHES MAXIMUM0.141 INCHES MAXIMUM IN
point_styleSELF-DRILLINGSELF-DRILLING
pilot_length0.1812 INCHES MINIMUM AND 0.1812 INCHES MINIMUM AND 0.2008 INCHES MAXIMUM0.2008 INCHES MAXIMUM IN
fastener_length0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN
thread_directionRIGHT-HANDRIGHT-HAND
surface_treatmentZINC OVERALL
width_between_flats0.244 INCHES MINIMUM AND 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM0.250 INCHES MAXIMUM IN
internal_drive_styleTORXTORX
spline_major_diameter0.40 INCHES NOMINAL0.40 INCHES NOMINAL IN
end_item_identificationMRAP BUFFALO MK2A2MRAP BUFFALO MK2A2
NSN5310-01-181-0650
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1131-943 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
SUBSTITUTES & CROSS-REFERENCES 2
1131953Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
1001070038Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1131-943?
1131-943 is a SCREW,SELF-DRILLING.
What parts can replace 1131-943?
There are 2 known substitutes for 1131-943: 1131953, 1001070038. Substitute compatibility should be verified for your specific system.
What is the NSN for 1131-943?
1131-943 is cataloged in the U.S. Government catalog under NSN 5310-01-181-0650. 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.